Adsorptive removal of bulky dye molecules from water with mesoporous polyaniline-derived carbon

• Hyung Jun An,
• Jong Min Park,
• Nazmul Abedin Khan and
• Sung Hwa Jhung

Beilstein J. Nanotechnol. 2020, 11, 597–605, doi:10.3762/bjnano.11.47

• adsorbents. The pore size distributions were calculated with nonlocal density functional theory (NLDFT). The hydrophobicity of the studied adsorbents was evaluated by measuring the relative quantities of adsorbed water and n-octane at 30 °C with thermogravimetric analysis (TGA, Perkin-Elmer TGA 4000 system

Facile biogenic fabrication of hydroxyapatite nanorods using cuttlefish bone and their bactericidal and biocompatibility study

• Satheeshkumar Balu,
• Manisha Vidyavathy Sundaradoss,
• Swetha Andra and
• Jaison Jeevanandam

Beilstein J. Nanotechnol. 2020, 11, 285–295, doi:10.3762/bjnano.11.21

• ) nanorods using cuttlefish bone powder as a precursor (CB-Hap NRs). The obtained CB-Hap NRs were investigated using transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and thermogravimetric analysis (TGA) techniques to evaluate their

• the TGA data revealed the thermal stability of Hap NRs. In addition, the antibacterial study showed a significant inhibitory effect of CB-Hap NRs against S. aureus (zone of inhibition – 14.5 ± 0.5 mm) and E. coli (13 ± 0.5 mm), whereas the blood compatibility test showed that the CB-Hap NRs exhibited

• analysis Figure 3 shows the thermogravimetric analysis (TGA) of cuttlefish bone and CB-Hap nanorod powder. Both CB and CB-Hap NRs show a similar gradual weight loss of 6% from 38 to 583 °C due to the evaporation of water and organic substances of cuttlefish [32]. A drastic weight loss of 22% was observed

Size effects of graphene nanoplatelets on the properties of high-density polyethylene nanocomposites: morphological, thermal, electrical, and mechanical characterization

• Tuba Evgin,
• Alpaslan Turgut,
• Georges Hamaoui,
• Zdenko Spitalsky,
• Nicolas Horny,
• Matej Micusik,
• Mihai Chirtoc,
• Mehmet Sarikanat and
• Maria Omastova

Beilstein J. Nanotechnol. 2020, 11, 167–179, doi:10.3762/bjnano.11.14

• -based nanocomposites. The parameters for the thermal stabilities predicted by TGA are given in Table 3. TGA curves of the samples are shown in Figure 7. Figure 7 shows that pure HDPE and the three HDPE/GnP nanocomposites all demonstrated a single-step thermal decomposition behavior between almost 440 °C

• each sample. Thermogravimetric analysis (TGA) of the samples was performed using a Q500 system from TA Company. TGA was carried out at a heating rate of 10 °C/min from room temperature to 700 °C under a nitrogen atmosphere. Differential scanning calorimetry (DSC) analysis was performed using a

• thermal conductivity of the matrix). Relative mechanical properties of the HDPE/GnP nanocomposites: a) Young’s moduli and b) tensile strengths. TGA thermographs of the HDPE/GnP nanocomposites with a) G1, b) G2, and c) G3 filler. The insets show derivative thermogravimetric (DTG) curves. Apparent surface

Simple synthesis of nanosheets of rGO and nitrogenated rGO

• Pallellappa Chithaiah,
• Madhan Mohan Raju,
• Giridhar U. Kulkarni and
• C. N. R. Rao

Beilstein J. Nanotechnol. 2020, 11, 68–75, doi:10.3762/bjnano.11.7

• -hybridized carbon atoms in the rGO domains. The 2D-band is the second order of the D-band. The Raman results are consistent with previous reports [5]. Thermogravimetric analysis (TGA) was carried out to investigate the thermal stability of the rGO and N-rGO nanosheets. The study was performed in an oxygen

• force microscopy (AFM), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). X-ray diffraction patterns of the samples were collected in the range of 10–70° (2θ) using a Bruker D8 diffractometer with a Cu Kα source (λ = 0.154178 nm). The morphology of the samples was examined using a Tescan

• discharge cycle. XRD patterns of (a) rGO and (b) N-rGO nanosheets. Raman spectra of (a) rGO and (b) N-rGO nanosheets. TGA curves of (a) rGO and (b) N-rGO nanosheets. (a, b) SEM images, (c) EDS pattern and chemical composition (inset), and (d) TEM image and SAED pattern (inset) of the rGO nanosheets. (a, b

pH-Controlled fluorescence switching in water-dispersed polymer brushes grafted to modified boron nitride nanotubes for cellular imaging

• Saban Kalay,
• Yurij Stetsyshyn,
• Volodymyr Donchak,
• Khrystyna Harhay,
• Ostap Lishchynskyi,
• Halyna Ohar,
• Yuriy Panchenko,
• Stanislav Voronov and
• Mustafa Çulha

Beilstein J. Nanotechnol. 2019, 10, 2428–2439, doi:10.3762/bjnano.10.233

• thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), ultraviolet–visible spectrophotometry (UV–vis), laser scanning confocal microscopy (LSCM) and scanning electron microscopy (SEM). The DLS results demonstrated that P(AA-co-FA)-functionalized BNNTs

• BNNTs were dried and stored as a powder. Characterization of BNNTs Thermogravimetric analysis (TGA) TGA analysis was performed using a Perkin Elmer Pyris 1 TGA instrument with Thermal Analysis Gas Station and Pyris Version 11.1.1.0497 software. The samples were analyzed under N2 gas flow, which was

• spectroscopic, gravimetric and imaging techniques including FTIR, UV–vis, DLS, TGA, LSCM and SEM. The fabrication of the oligoperoxide-functionalized BNNTs was described in detail in our previous publication [12] and here we focus on the synthesis and properties of the P(AA-co-FA)-functionalized BNNTs. The

Design and facile synthesis of defect-rich C-MoS₂/rGO nanosheets for enhanced lithium–sulfur battery performance

• Chengxiang Tian,
• Juwei Wu,
• Zheng Ma,
• Bo Li,
• Pengcheng Li,
• Xiaotao Zu and
• Xia Xiang

Beilstein J. Nanotechnol. 2019, 10, 2251–2260, doi:10.3762/bjnano.10.217

• sulfur in the samples were analyzed by thermogravimetric (TGA) on a Netzsch STA 449C analyzer in air for the amorphous carbon and rGO or in N2 atmosphere for the sulfur at a temperature ramp rate of 10 °C·min−1. Lithium polysulfide adsorption tests The concentration of the fabricated Li2S6 solution was

• specific surface area. The sulfur contents in the different composites as tested by TGA were about 75 wt % as shown in Figure 5c. The capability to adsorption polysulfides of pristine MoS2, C-MoS2/rGO and C-MoS2/rGO-6 was also measured as shown in Figure 5d. From the inset photograph, C-MoS2/rGO-6

Long-term entrapment and temperature-controlled-release of SF₆ gas in metal–organic frameworks (MOFs)

• Hana Bunzen,
• Andreas Kalytta-Mewes,
• Leo van Wüllen and
• Dirk Volkmer

Beilstein J. Nanotechnol. 2019, 10, 1851–1859, doi:10.3762/bjnano.10.180

• molecules left in the pores, thus ensuring that the whole pore volume was available for trapping the SF6 guest. The bulk sample was analyzed before and after the gas loading by conventional analytical methods, including FTIR, powder X-ray diffraction (XRD) and thermogravimetric analysis (TGA). SF6-loading

• highest loading was achieved after 18 hours at 250 °C (sample 3). Prolonging the loading time did not lead to a higher loading. Therefore, sample 3 was used in the following studies. To estimate the amount of the guest loaded into the MOF, we used TGA (Figure 1 and Figure S2 in Supporting Information File

• SF6 was gradually released from 150 to 390 °C (Figure S3 in Supporting Information File 1). Therefore, this temperature range was used to quantify the amount of loaded SF6 from the TGA data (Table 1). The activation energy for the guest release was estimated by temperature-modulated TGA to be as high

The impact of crystal size and temperature on the adsorption-induced flexibility of the Zr-based metal–organic framework DUT-98

• Simon Krause,
• Volodymyr Bon,
• Hongchu Du,
• Rafal E. Dunin-Borkowski,
• Ulrich Stoeck,
• Irena Senkovska and
• Stefan Kaskel

Beilstein J. Nanotechnol. 2019, 10, 1737–1744, doi:10.3762/bjnano.10.169

• Information File 1, Figures S4–S7). Thermogravimetric analysis (TGA) of activated DUT-98 samples shows a decrease in the decomposition temperature from 440–420 °C with decreasing crystal size (Supporting Information File 1, Figure S11). However, the general shape of the TGA curves is very similar, indicating

TiO₂/GO-coated functional separator to suppress polysulfide migration in lithium–sulfur batteries

• Ning Liu,
• Lu Wang,
• Taizhe Tan,
• Yan Zhao and
• Yongguang Zhang

Beilstein J. Nanotechnol. 2019, 10, 1726–1736, doi:10.3762/bjnano.10.168

• crystallized with a low degree of crystallinity after spray drying. Thermogravimetric analysis (TGA) of the TiO2/GO composite is presented in Figure 2c. When the temperature was increased from room temperature to 120 °C, a weight decrease of 8.8% was noticed due to the elimination of a small amount of adsorbed

• mV. Schematic illustration of a Li/S battery with a TiO2/GO-coated functional separator. (a) XRD patterns of the as-spun and as-dealloyed Ti10Al90 alloy foils. (b) Raman spectra of TiO2, GO and the TiO2/GO composite. (c) TGA curve and (d) N2 adsorption–desorption isotherms and pore size distribution

Novel hollow titanium dioxide nanospheres with antimicrobial activity against resistant bacteria

• Carol López de Dicastillo,
• Cristian Patiño,
• María José Galotto,
• Yesseny Vásquez-Martínez,
• Claudia Torrent,
• Daniela Alburquenque,
• Alejandro Pereira and
• Juan Escrig

Beilstein J. Nanotechnol. 2019, 10, 1716–1725, doi:10.3762/bjnano.10.167

• chemical composition was also performed by Fourier-transform infrared spectroscopy (FTIR) in order to study the main functional groups of the sample (data found in Supporting Information File 1). Thermogravimetric analysis (TGA) curves representing the mass loss with respect to temperature of SPVP, coated

• expected, the TGA curves of structures containing PVP clearly evidenced both typical PVP degradation processes: i) the carbonic backbone decomposition around 200 °C; and ii) pyrrolidone group decomposition between 350 and 470 °C [24][25][26]. TGA was used to verify two important facts: i) The calcination

• process effectively removed the PVP polymer, since CSTiO2 presented the same TGA curve as the commercial TiO2 NPs. TGA curves of CSTiO2 did not show any PVP degradation process thereby demonstrating that CSTiO2 was PVP-free. ii) The aluminum oxide and titanium dioxide deposited during the ALD processes

Highly ordered mesoporous silica film nanocomposites containing gold nanoparticles for the catalytic reduction of 4-nitrophenol

• Mohamad Azani Jalani,
• Leny Yuliati,
• Siew Ling Lee and
• Hendrik O. Lintang

Beilstein J. Nanotechnol. 2019, 10, 1368–1379, doi:10.3762/bjnano.10.135

• of sodium borohydride (NaBH4). Results and Discussion Thermal decomposition of [Au3Pz3]C10TEG Thermogravimetric analysis (TGA) was used to examine the process of weight loss as a function of temperature change [34]. The thermal behavior of the [Au3Pz3]C10TEG was further supported by its TGA

• 200 kV. For the TEM tomography, the sample was visualized using a Hitachi HT7700 instrument for high-resolution imaging at low accelerating voltage (80 kV) where the 3D reconstruction was performed using a Hitachi EMIP tomography acquisition. Thermogravimetric analysis (TGA) was performed using a

• Mettler-Toledo TGA/SDTA851e device at a heating rate of 10 °C min−1. For the fabrication, the sol–gel solution was spin-coated on a quartz plate using a Laurell spin coater, model WS-400-6NPP-LITE. Calcination was carried out under atmospheric conditions using a Nabertherm model LE6/11 muffle furnace

The effect of magneto-crystalline anisotropy on the properties of hard and soft magnetic ferrite nanoparticles

• Hajar Jalili,
• Bagher Aslibeiki,
• Ali Ghotbi Varzaneh and
• Volodymyr A. Chernenko

Beilstein J. Nanotechnol. 2019, 10, 1348–1359, doi:10.3762/bjnano.10.133

• the CoFe2O4 samples was checked by thermogravimetric analysis (TGA). Figure 7 shows two weight-loss stages. The first weight loss (about 2.8%), observed in the temperature range of 30–200 °C, is attributed to the vaporization of water from the sample. Since the possible decomposition of spinel ferrite

• . The diffraction patterns were analyzed using the FullProf-Suite (Version 6.0) software. Thermogravimetric analysis (TGA) was carried out in the temperature range from 30 to 650 °C with a heating rate of 10 °C/min under N2 flow using a TGA/SDTA 851 Mettler Toledo thermogravimetric analyzer. Fourier

• correspond to the tetrahedral A-sites and octahedral B-sites, respectively. TGA curve of the CoFe2O4 sample. Room-temperature magnetization curves of the CoxFe3−xO4 samples measured. The inset shows the magnetization behavior at low fields. The M–1/H2 dependence of the CoxFe3−xO4 samples at high field

Scavenging of reactive oxygen species by phenolic compound-modified maghemite nanoparticles

• Małgorzata Świętek,
• Yi-Chin Lu,
• Rafał Konefał,
• Liliana P. Ferreira,
• M. Margarida Cruz,
• Yunn-Hwa Ma and
• Daniel Horák

Beilstein J. Nanotechnol. 2019, 10, 1073–1088, doi:10.3762/bjnano.10.108

• -FeO were located below this range, and only one weak peak at ca. 896 cm−1 was ascribed to pure γ-Fe2O3 [25]. The absorption peak above 3000 cm−1 corresponds to the O–H stretching vibration (Figure 3a). According to the TGA results, the γ-Fe2O3 weight loss occurred in two temperature ranges (Figure 3b

• magnetization of the γ-Fe2O3@Hep colloid (by 2%) at 260 K was observed compared to the saturation magnetization of γ-Fe2O3 at the same particle concentration (inset in Figure 3c). This decrease was caused by the increased content of the nonmagnetic fraction in the particles. The TGA result of the γ-Fe2O3@Hep

• ; however, the peaks were slightly shifted to lower values. For example, peaks at 1038 and 1072 cm−1 in the spectra of the modified chitosan-coated particles corresponded to the peaks at 1028 and 1064 cm−1 in the spectrum of the modified chitosans (Figure 3a), respectively. Additionally, the TGA thermograms

Structural and optical properties of penicillamine-protected gold nanocluster fractions separated by sequential size-selective fractionation

• Xiupei Yang,
• Zhengli Yang,
• Fenglin Tang,
• Jing Xu,
• Maoxue Zhang and
• Martin M. F. Choi

Beilstein J. Nanotechnol. 2019, 10, 955–966, doi:10.3762/bjnano.10.96

• source at 1253.6 eV (10 kV, 20 mA). Thermogravimetric analysis (TGA) measurements were conducted with a Perkin-Elmer TGA 6 thermogravimetric analyzer (Waltham, MA, USA). In addition, the UV–vis absorption spectra of the crude AuNC product and the AuNC fractions were recorded on a Cary 100 Scan UV–vis

• (TGA) of the AuNC samples was carried out and the weight loss of the crude AuNCs product, F36%, F54%, F72%, and F90% fractions were calculated as well. Based on the TGA and MS results, the average molecular formula of the four fractions could be determined as Au38(SR)18, Au28(SR)15, Au18(SR)12, and

• (the smaller NCs are protected by relative more hydrophilic ligand). The Au/S ratio decreases with the decrease in the cluster core size which is also verified by the TGA results. TGA data showed that the percentage of ligands in AuNCs increased as the cluster size decreased. A small amount of Na and

Tungsten disulfide-based nanocomposites for photothermal therapy

• Tzuriel Levin,
• Hagit Sade,
• Rina Ben-Shabbat Binyamini,
• Maayan Pour,
• Iftach Nachman and
• Jean-Paul Lellouche

Beilstein J. Nanotechnol. 2019, 10, 811–822, doi:10.3762/bjnano.10.81

• performed using OMNIC 9 spectra software (Thermo Scientific, Waltham, MA, US). Thermogravimetric analysis (TGA) was performed by employing a TGA/DSC1 analyzer (Mettler-Toledo, Greifensee, Switzerland). All thermograms were recorded in a nitrogen (50 mL/min) environment at a heating rate of 10 °C·min−1 over

• nanoparticles. The preparation procedures are facile and make use of readily available reagents and equipment. Electron microscopy, FTIR, zeta potential, TGA, and ICP analyses demonstrated the attachment of CAN-mag nanoparticles to the nanotubes. CAN-mag attachment around the nanotubes was not conformal, and in

• enabled the attachment of PEI and PAA onto the nanocomposite, as shown by TEM, FTIR, TGA, and zeta potential. The ability for further attachment of polymers and other molecules can be utilized to enhance the therapeutic activity. One way is the attachment of a second PTT agent, such as a polypyrrole, and

An efficient electrode material for high performance solid-state hybrid supercapacitors based on a Cu/CuO/porous carbon nanofiber/TiO₂ hybrid composite

• Mamta Sham Lal,
• Thirugnanam Lavanya and
• Sundara Ramaprabhu

Beilstein J. Nanotechnol. 2019, 10, 781–793, doi:10.3762/bjnano.10.78

• . Thermogravimetric analysis was carried out using SDT Q600 with a TGA/DTA 6200 thermogravimetric analyzer from room temperature to 1000 °C under N2 flow. Electrochemical measurements A CH Instruments device (model CHI 900B) was employed to examine the electrochemical properties of the samples. The working electrode

• composite, TGA analysis was performed from room temperature to 1000 °C in inert atmosphere at a heating rate of 5 °C/min. Figure 9 shows the TGA curve of the Cu/CuO/PCNF/TiO2 composite. The weight loss below 200 °C is due to the removal of the absorbed water molecules. The weight loss around 700 °C is due

Towards rare-earth-free white light-emitting diode devices based on the combination of dicyanomethylene and pyranine as organic dyes supported on zinc single-layered hydroxide

• Jeff L. Nyalosaso,
• Rachod Boonsin,
• Pierre Vialat,
• Damien Boyer,
• Geneviève Chadeyron,
• Rachid Mahiou and
• Fabrice Leroux

Beilstein J. Nanotechnol. 2019, 10, 760–770, doi:10.3762/bjnano.10.75

• before the measurement. Dye molecules used for the preparation of the organic phosphor film. (a) Normalized emission spectra of blue LED light and selected dyes in ethanol solution: DCM and HPTS and (b) their predicted combined spectrum. (a) SEM image, (b) XRD pattern and (c) TGA/DTA of zinc

Outstanding chain-extension effect and high UV resistance of polybutylene succinate containing amino-acid-modified layered double hydroxides

• Adam A. Marek,
• Vincent Verney,
• Christine Taviot-Gueho,
• Grazia Totaro,
• Laura Sisti,
• Annamaria Celli and
• Fabrice Leroux

Beilstein J. Nanotechnol. 2019, 10, 684–695, doi:10.3762/bjnano.10.68

• spectroscopy (FTIR) and thermogravimetric analysis (TGA). As expected, the UV–vis spectra showed absorbance in the UVC and UVB regions and the potential role as UV stabilizers. In a second part, PBS composites were prepared with 5 wt % of LDH filler by melt blending and once again fully characterized (XRD, TGA

• associated with the glass-to-rubber transition. The crystallization temperature (Tc) and the enthalpy of crystallization (∆Hc) were measured during the cooling scan. Thermogravimetric analysis (TGA) of LDH fillers and composites was performed in air atmosphere (gas flow 30 mL min−1) using a Perkin Elmer TGA7

• , C–N) overlap in the range of 1700–1480 cm−1 and the lattice vibration of M–O in the platelet structure can be depicted at a low wavenumber (800–650 cm−1). The experimental chemical composition of all synthesized LDHs has been estimated based on TGA analysis and collected in Table 1. All the

Ceria/polymer nanocontainers for high-performance encapsulation of fluorophores

• Kartheek Katta,
• Dmitry Busko,
• Yuri Avlasevich,
• Katharina Landfester,
• Stanislav Baluschev and
• Rafael Muñoz-Espí

Beilstein J. Nanotechnol. 2019, 10, 522–530, doi:10.3762/bjnano.10.53

• ). Thermogravimetric analysis of the freeze-dried sample was conducted using a Mettler Toledo TGA-851 at a heating rate of 10 °C·min−1. Fluorescence spectra were recorded for the dispersions containing 0.75 wt % capsule content by using in a custom-built setup containing a diode laser with wavelength 635 nm (Roithner

• (sample NC-CeO2 at ambient conditions). Characteristics of the samples reported in this work. Supporting Information Supporting Information File 80: Chemical structure of TDI, absorption and emission spectra of TDI, EDX spectra, TGA, and additional photoluminescence emission spectra of samples

• . Acknowledgements The source of this article is the doctoral dissertation of the first author, Dr. Katheek Katta (Uniform Resource Name: urn:nbn:de:hebis:77-diss-1000007157). Michael Steiert, Petra Räder, Gunnar Glaßer, and Katrin Kirchhoff are acknowledged for XRD, TGA, EDX, and high-resolution TEM measurements

A porous 3D-RGO@MWCNT hybrid material as Li–S battery cathode

• Yongguang Zhang,
• Jun Ren,
• Yan Zhao,
• Taizhe Tan,
• Fuxing Yin and
• Yichao Wang

Beilstein J. Nanotechnol. 2019, 10, 514–521, doi:10.3762/bjnano.10.52

• immobilize sulfur and polysulfides within S-3D-RGO@MWCNT, reducing the shuttle effect and improving the cycling life of Li–S batteries. The thermogravimetric analysis (TGA) analysis (Figure 4f) shows that the S-3D-RGO@MWCNT composite exhibits a very high weight loss (62 wt %) between 30 and 300 °C

• (HRTEM, JEOL JEM-2100F) images were used for investigating surface topology. The content of sulfur in the S-3D-RGO@MWCNT composite was confirmed using thermogravimetric analysis (TGA, SHIMADZU DTG-60) in Ar atmosphere. Raman spectra were recorded on Raman spectrometer (Raman, Renishaw) using 532 nm

• @MWCNT; (c) TGA of S-3D-RGO@MWCNT; (d) The XPS survey spectrum of S-3D-RGO@MWCNT composite; high-resolution XPS spectra of (e) C 1s, (f) S 2p. CV curves of the S-3D-RGO@MWCNT cathode at 0.1 mV·s−1 in the first four cycles. (a) CV measurement of the S-3D-RGO@MWCNT cathode (1st, 50th, 100th, 150th and

Removal of toxic heavy metals from river water samples using a porous silica surface modified with a new β-ketoenolic host

• Said Tighadouini,
• Smaail Radi,
• Abderrahman Elidrissi,
• Khadija Haboubi,
• Maryse Bacquet,
• Stéphanie Degoutin,
• Mustapha Zaghrioui and
• Yann Garcia

Beilstein J. Nanotechnol. 2019, 10, 262–273, doi:10.3762/bjnano.10.25

• characterized by elemental analysis, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) images, thermogravimetric analysis (TGA) and nitrogen adsorption–desorption isotherms. Physical methods. Atomic adsorption measurements were performed on a Varian A.A. 400 spectrophotometer

• , respectively, demonstrate the modification of SiNH2 with L1. Compared to the blank silica, the surface of the new material (SiNL) shown by SEM (Figure 2) became rough, which confirms the success of organic moieties filling the surface. The thermal stability of SiG, SiNH2 and SiNL was evaluated by TGA (Figure 3

• different metals. Stability and reusability of the adsorbent. Our hybrid material can be reused more than five times without significant loss in adsorption efficiency (Table 4). This can be explained by the high stability of organic groups onto SiNL which was confirmed by TGA, showing no distinct changes in

Thermal control of the defunctionalization of supported Au₂₅(glutathione)₁₈ catalysts for benzyl alcohol oxidation

• Zahraa Shahin,
• Hyewon Ji,
• Rodica Chiriac,
• Nadine Essayem,
• Franck Rataboul and
• Aude Demessence

Beilstein J. Nanotechnol. 2019, 10, 228–237, doi:10.3762/bjnano.10.21

• diagrams and no indication of reflection of bulk gold (Figure S4, Supporting Information File 1). These observations mean that there is no modification of the support and that the quantity of gold is too small to be detected. Thermal studies of the materials were done by thermogravimetric analysis (TGA

• ) under air on pure Au25(SG)18 gold clusters, gold clusters deposited on ZrO2 and ZrO2 alone. From the TGA curve of the clusters, a first gradual weight loss of 6.5% is observed before 200 °C, corresponding to the evaporation of the solvent (Figure 1a). Then a second gradual weight loss of 46.2% happens

• to completely remove the glutathione molecules from the gold surface. For the TGA of the ZrO2 support, 2.4% weight loss was observed at low temperature that corresponds to trace water (Figure 2). After the deposition of 1 wt % Au using Au25(SG)18 on ZrO2, a first weight loss of 2.4% is observed and a

pH-mediated control over the mesostructure of ordered mesoporous materials templated by polyion complex micelles

• Emilie Molina,
• Mélody Mathonnat,
• Jason Richard,
• Patrick Lacroix-Desmazes,
• Martin In,
• Philippe Dieudonné,
• Thomas Cacciaguerra,
• Corine Gérardin and
• Nathalie Marcotte

Beilstein J. Nanotechnol. 2019, 10, 144–156, doi:10.3762/bjnano.10.14

• determination of the volume-averaged hydrodynamic diameters (Dhv); the polydispersity index (PDI) values were obtained from the cumulant method. The chemical composition of the hybrid materials was calculated by combining thermogravimetric analysis (TGA), which allows quantifying the silica content, and N and C

• elemental analyses (EA), which allow determining the quantity of OC and PEO-b-PAA in the material. The results were expressed as N/AA and EO/Si ratios given with ±5% relative error. TGA was performed on a Perkin Elmer STA 6000 instrument at a heating rate of 10 °C·min−1 under an air flow (20 mL·min−1) up to

New micro/mesoporous nanocomposite material from low-cost sources for the efficient removal of aromatic and pathogenic pollutants from water

• Emmanuel I. Unuabonah,
• Robert Nöske,
• Jens Weber,
• Christina Günter and
• Andreas Taubert

Beilstein J. Nanotechnol. 2019, 10, 119–131, doi:10.3762/bjnano.10.11

• , the samples made at 750 °C and higher also contain plate-like or fiber-like features. Thermogravimetric and differential thermal analysis Figure 7 shows representative thermogravimetric analysis/differential thermal analysis (TGA/DTA) data obtained from measurements in nitrogen. Consistent with the

• data shown above, there are clear differences between samples produced at reaction temperatures up to 450 °C and the samples obtained at higher temperatures. The samples made between 500 and 900 °C only show a weak and very gradual weight loss of ≈5–6% of the total mass at the end of the TGA/DTA

• processes cannot be separated here. TGA/DTA data analysis therefore indicates that the reaction temperature is indeed a key parameter to obtain a stable material that will resist rapid attrition during use. Comparison with the nitrogen sorption data suggests that a reaction temperature of ≈500 °C is

A novel polyhedral oligomeric silsesquioxane-modified layered double hydroxide: preparation, characterization and properties

• Xianwei Zhang,
• Zhongzhu Ma,
• Hong Fan,
• Carla Bittencourt,
• Jintao Wan and
• Philippe Dubois

Beilstein J. Nanotechnol. 2018, 9, 3053–3068, doi:10.3762/bjnano.9.284

• anions and the metal-hydroxide sheets. This largely reduces the contribution of the water layer accommodated in the interlayer region to the basal spacing [15][19][33]. Here, it is proposed that the less strongly bound interlayer water, which is further verified later by TGA results, might be another

• Thermal stability The thermal decomposition behavior was investigated to evaluate the thermal stability of LDHs, and the TGA thermograms are presented in Figure 10, with the measured data being summarized in Table 3. As can be seen in Figure 10a, the decomposition of NLDH under N2 atmosphere mainly

• slopes of these lines using the following expression: The fitting results and Eα data are summarized in Table 4. Results show that the apparent activation energy increases as a whole with increasing conversion. Combined with the TGA data and the data of α as a function of T, the Eα values of NLDH can be