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

• are almost completely removed during the hydrothermal synthesis and annealing process [41]. Full nitrogen sorption isotherms of the composites were measured to obtain the specific surface area and the pore size distribution. A type-IV isotherm with a type-H3 hysteresis loop in the relative pressure

• spectra and high-resolution XPS spectra of (d) Mo 3d and (e) S 3d of pristine MoS2, C-MoS2/rGO and C-MoS2/rGO-6 composites, and (f) high-resolution XPS spectra of C 1s C-MoS2/rGO and C-MoS2/rGO-6 composites, respectively. (a) N2 adsorption–desorption isotherms and (b) corresponding pore size distributions

Improved adsorption and degradation performance by S-doping of (001)-TiO₂

• Xiao-Yu Sun,
• Xian Zhang,
• Xiao Sun,
• Ni-Xian Qian,
• Min Wang and
• Yong-Qing Ma

Beilstein J. Nanotechnol. 2019, 10, 2116–2127, doi:10.3762/bjnano.10.206

• probed by Fourier-transform infrared (FTIR) spectroscopy (Vertex 80/Hyperion2000, Bruker, Germany). The Brunauer–Emmett–Teller (BET) specific surface areas were calculated based on the N2 adsorption–desorption isotherms measured at 77 K using a gas adsorption apparatus (Autosorb-iQ, Quantachrome

• of all samples were measured using nitrogen adsorption–desorption isotherms. Figure 8 only shows the results obtained for 2-S0, 2-S2 and 2-S5. The BJH desorption pore distribution (Dp) analysis results are shown in the inset. The SBET values and Dp values of all samples are listed in Table 6

• sample 2-S2 (a) and the variation of the MB concentration C/C0 with time in the presence of 2-S0, 2-S0.5, 2-S1, 2-S2, 2-S3, 2-S4 and 2-S5 and commercial P25 TiO2 irradiated by a xenon lamp (b). Nitrogen adsorption–desorption isotherms of samples 2-S0, 2-S and 2-S5. The inset shows the pore size

Synthesis of highly active ETS-10-based titanosilicate for heterogeneously catalyzed transesterification of triglycerides

• Muhammad A. Zaheer,
• David Poppitz,
• Khavar Feyzullayeva,
• Marianne Wenzel,
• Jörg Matysik,
• Radomir Ljupkovic,
• Aleksandra Zarubica,
• Alexander A. Karavaev,
• Andreas Pöppl,
• Roger Gläser and
• Muslim Dvoyashkin

Beilstein J. Nanotechnol. 2019, 10, 2039–2061, doi:10.3762/bjnano.10.200

• peak at 24.63°) reflects the high crystallinity of the prepared ETS-10 material. Data of the textural analysis by N2 sorption into the Na,K-ETS-10 sample is presented in Figure 4. The isotherms exhibit the Type I shape [37] (revealing the presence of solely micropores) and have a specific surface area

•  7B). The N2 sorption isotherms revealed an increasing impact of treatment on the textural properties of the titanosilicates with longer treatment time (Figure 9A) – the total pore volume increased from 0.127 cm3 g−1 for Na,K-ETS-10 to 0.132, 0.181 and 0.229 cm3 g−1 after 30, 45 and 60 min of contact

• isotherms to obtain the “hydrophilicity index” according to Thommes et al. [81] are planned. In the case of the calcined hierarchical titanosilicate C-P-ETS-10, a dramatic increase in activity is observed, as compared to Na,K-ETS-10 and P-ETS-10/60, showing full conversion already after 8 h. After 4 h, the

The influence of porosity on nanoparticle formation in hierarchical aluminophosphates

• Matthew E. Potter,
• Lauren N. Riley,
• Alice E. Oakley,
• Panashe M. Mhembere,
• June Callison and
• Robert Raja

Beilstein J. Nanotechnol. 2019, 10, 1952–1957, doi:10.3762/bjnano.10.191

• , the measurements here provide a reasonable estimate (Table S4, Supporting Information File 1). Further qualitative comparison of the isotherms for the Au-doped MP and HP at low pressure confirms the significantly lower surface area in the MP systems. The total pore volume follows a similar trend, with

• of microporous MP-SAPO-5 (A) and hierarchical HP-SAPO-5 (B). Nitrogen physisorption isotherms of gold-deposited microporous (A) and hierarchical (B) SAPO-5 systems showing that porosity is maintained in hierarchical HP-SAPO-5, but not in microporous MP-SAPO-5. The magnitude and imaginary component of

Charge-transfer interactions between fullerenes and a mesoporous tetrathiafulvalene-based metal–organic framework

• Manuel Souto,
• Joaquín Calbo,
• Samuel Mañas-Valero,
• Aron Walsh and
• Guillermo Mínguez Espallargas

Beilstein J. Nanotechnol. 2019, 10, 1883–1893, doi:10.3762/bjnano.10.183

• and type-IV isotherms (Figure 4a), as in the case of MUV-2, indicating the presence of micropores and mesopores in the framework. C60@MUV-2 has a Brunauer–Emmett–Teller (BET) surface area of 1040 m2/g, which is slightly lower than that of MUV-2 (1190 m2/g). Thus, porosity is retained after

• on the solid state by dispersing the crystals in KBr pellets. Nitrogen adsorption isotherms were measured using a TriStar II PLUS apparatus (Micromeritics) at 77 K. The BET surface area was calculated by using the Brunauer–Emmett–Teller equation. The high-pressure CO2 adsorption isotherms were

• the samples in KBr pellets. a) Nitrogen adsorption isotherms at 77 K and b) high-pressure CO2 adsorption isotherms at 298 K, on MUV-2 (black) and C60@MUV-2 (red). a) Minimum-energy crystal structure calculated for conformations A and B of host–guest C60@MUV-2 at the PBEsol level under periodic

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

• et al. on a redox-active flexible MOF [25]. Nitrogen isotherms at 77 K of both materials show a pronounced pressure reduction upon structural opening referred to by the authors as “negative gas pressure”. Such artificial pressure reduction upon structural expansion is also observed in DUT-98 and a

• a series of flexible MOFs with predominantly one-dimensional channels [29]. In that investigation, the pgo in DUT-8(Ni) and SNU-9 isotherms was found to be shifted to higher pressures upon cycling. In contrast, the cycling of MIL-53 and ELM-11 was found to only slightly impact the adsorption

• and adsorption-induced flexibility, N2 adsorption–desorption isotherms at 77 K were recorded on DUT-98(2)–(4) and compared to the initial isotherm of DUT-98(1) (Figure 3e–h). Interestingly, only DUT-98(1) exhibits a flexible behavior evident by the stepped isotherm and wide hysteresis. DUT-98(2

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

• 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

Upcycling of polyurethane waste by mechanochemistry: synthesis of N-doped porous carbon materials for supercapacitor applications

• Christina Schneidermann,
• Pascal Otto,
• Desirée Leistenschneider,
• Sven Grätz,
• Claudia Eßbach and
• Lars Borchardt

Beilstein J. Nanotechnol. 2019, 10, 1618–1627, doi:10.3762/bjnano.10.157

• vapor adsorption was performed exemplarily for the samples PUPC-800-3, PUUPC-800-1, and PUUPC-800-2 to demonstrate the effect of the porosity and the generated nitrogen functionalities on sorption, phase and wetting behavior. The water isotherms of all measured samples are assigned to a type V isotherm

• -energy ball milling and carbonization of a mixture of PU foam as the carbon source and potassium carbonate (K2CO3) as an activation reagent to form nitrogen-doped porous carbon as an electrode material for supercapacitors. (A, C) Nitrogen adsorption/desorption (filled symbols/empty symbols) isotherms

• ), PUUPC-4-800 (cyan) and PUUPC-5-800 (black). (A) Water vapor sorption isotherms (adsorption/desorption = filled symbols/empty symbols) measured at 25 °C and (B) magnification of the lower relative pressure range of the samples: PUUPC-800-1 (cyan), PUUPC-800-2 (green) and PUPC-800-3 (blue). (A) Cyclic

High-temperature resistive gas sensors based on ZnO/SiC nanocomposites

• Vadim B. Platonov,
• Marina N. Rumyantseva,
• Alexander S. Frolov,
• Alexey D. Yapryntsev and
• Alexander M. Gaskov

Beilstein J. Nanotechnol. 2019, 10, 1537–1547, doi:10.3762/bjnano.10.151

• instrument (Micromeritics). Prior to this, all samples were evacuated at a temperature of 300 °C to 4 × 10−1 Pa for 3 h. Based on the nitrogen adsorption isotherms obtained, the specific surface area, volume, and average pore size were calculated using BET (Brunauer–Emmett–Teller) and BJH (Barret–Johner

Synthesis of P- and N-doped carbon catalysts for the oxygen reduction reaction via controlled phosphoric acid treatment of folic acid

• Rieko Kobayashi,
• Takafumi Ishii,
• Yasuo Imashiro and
• Jun-ichi Ozaki

Beilstein J. Nanotechnol. 2019, 10, 1497–1510, doi:10.3762/bjnano.10.148

• from X-ray photoelectron spectra of P-series precursors (Table 1, for the naming scheme of the samples see section “Experimental”). The N2 adsorption isotherms together with the micropore size distribution curves are given in Figure S1 (Supporting Information File 1). The BET specific surface area

• values were calculated from these isotherms. The BET-SSAs of samples prepared at CPAT temperatures below 700 °C were estimated to be of several square meters per gram but rapidly increased at CPAT temperatures above 800 °C, with maximum values obtained at 1000 °C. This behavior was different from that of

• prepared by thoroughly rinsing P-series precursors with water to remove excess PA and subjecting them to carbonization at 1000 °C. The same operation was also performed for H-series precursors to afford HH-series carbon materials. The N2 adsorption isotherms are presented in Figure S5 (Supporting

Selective gas detection using Mn₃O₄/WO₃ composites as a sensing layer

• Yongjiao Sun,
• Zhichao Yu,
• Wenda Wang,
• Pengwei Li,
• Gang Li,
• Wendong Zhang,
• Lin Chen,
• Serge Zhuivkov and
• Jie Hu

Beilstein J. Nanotechnol. 2019, 10, 1423–1433, doi:10.3762/bjnano.10.140

• , respectively. The TEM results indicate that the Mn3O4 nanoparticles have attached on the surface of WO3. The BET surface area of pure and Mn3O4/WO3 composites was investigated based on N2 adsorption–desorption. Figure 4 presents the N2 adsorption isotherms and the corresponding desorption isotherms. As shown

• in the figure, the curves are type II isotherms with a H3 hysteresis loop, suggesting non-porous structures. The specific surface area of all samples are 14.82, 14.66, 14.23 and 13.98 m2/g, respectively, which slightly reduce with increasing Mn concentration. This result might be related to the

• of pure WO3 and Mn3O4/WO3 composites, and (b) the magnified region of the (402) peaks. SEM images of (a) WO3, (b) 1 atom %, (c) 3 atom % and (d) 5 atom % Mn3O4/WO3 composites. (a) TEM image and (b,c) HRTEM image of 5 atom % Mn3O4/WO3 composites. N2 adsorption–desorption isotherms of pure WO3 and

BiOCl/TiO₂/diatomite composites with enhanced visible-light photocatalytic activity for the degradation of rhodamine B

• Minlin Ao,
• Kun Liu,
• Xuekun Tang,
• Zishun Li,
• Qian Peng and
• Jing Huang

Beilstein J. Nanotechnol. 2019, 10, 1412–1422, doi:10.3762/bjnano.10.139

• and pore volume are shown in Table 1. Density functional theory (DFT) mode was undertaken to characterize the porosity of these samples. According to the N2 adsorption–desorption isotherms, we can see that all four samples belong to IV-type isotherms. BiOCl has an H2-type hysteresis loop, while

• potential in the field of organic wastewater treatment driven by solar energy. XRD patterns of the TiO2/diatomite, BiOCl and BTD (a) and BTD with different calcination temperatures (b). N2 adsorption–desorption isotherms (a) and pore size distribution plots (b) of the samples. XPS spectra of BTD, including

Warped graphitic layers generated by oxidation of fullerene extraction residue and its oxygen reduction catalytic activity

• Machiko Takigami,
• Rieko Kobayashi,
• Takafumi Ishii,
• Yasuo Imashiro and
• Jun-ichi Ozaki

Beilstein J. Nanotechnol. 2019, 10, 1391–1400, doi:10.3762/bjnano.10.137

• automatic surface area analyzer (BELSORP MINI, Microtrak BEL Inc., Japan) was used to measure the N2 adsorption isotherms at 77 K after evacuating the sample at 200 °C for 2 h under a dynamic vacuum. The Brunauer–Emmett–Teller (BET) theory was applied to determine the surface area (BET-SSAs) of the samples

• as calculated from the isotherms. An automatic static adsorption analyzer (BELSORP Max, Microtrac BEL Inc., Japan) was used to measure the O2 adsorption isotherms at −80 °C with a pressure range of 5 to 100 kPa. A differential scanning calorimeter (DSC8500, Perkin-Elmer) was used to measure the heat

Multicomponent bionanocomposites based on clay nanoarchitectures for electrochemical devices

• Giulia Lo Dico,
• Bernd Wicklein,
• Lorenzo Lisuzzo,
• Giuseppe Lazzara,
• Pilar Aranda and
• Eduardo Ruiz-Hitzky

Beilstein J. Nanotechnol. 2019, 10, 1303–1315, doi:10.3762/bjnano.10.129

• isotherms (Figure S2a,b in Supporting Information File 1). The BET specific surface area of the samples Film-1 and Foam-1 was 5 and 58 m2·g−1, respectively. The microstructure of the films was characterized by X-ray diffraction (XRD). The diffractogram of Film-1 displays the main reflections of both

• immobilization via covalent bonding is essential for the preservation of the enzyme structure and bioactivity [38][58]. The presence of GOx in the lumen of HNTs was also evidenced by measuring nitrogen adsorption/desorption isotherms (Figure S7, Supporting Information File 1). Compared to pristine HNTs, a

• isotherms obtained on a Micromeritics ASAP 2010 analyser. The samples were degassed at 120 °C under vacuum. The stability of the bionanocomposites in water was assessed by immersing a piece of the film in bi-distilled water for two months and noting the weight loss. The relative density (ρrel) of the

Playing with covalent triazine framework tiles for improved CO₂ adsorption properties and catalytic performance

• Giulia Tuci,
• Andree Iemhoff,
• Housseinou Ba,
• Lapo Luconi,
• Andrea Rossin,
• Vasiliki Papaefthimiou,
• Regina Palkovits,
• Jens Artz,
• Cuong Pham-Huu and
• Giuliano Giambastiani

Beilstein J. Nanotechnol. 2019, 10, 1217–1227, doi:10.3762/bjnano.10.121

• focussed on 4,5-dicyanoimidazole (DCI, III) as a novel and highly N-rich monomer to be used for CTF synthesis as such (III→CTF3), or in equimolar mixture with one of the two other building blocks (IV→CTF4; V→CTF5). N2 physisorption isotherms recorded on CTF3–5 present classical type-I(b) profiles [46] that

• has been used in equimolar amount with either I or II, while keeping the ZnCl2/monomer(s) molar ratio constant at 5:1. Isotherms recorded on mixed CTFs (CTF4,5) account for materials with markedly higher gas-uptake capacities compared to CTF3. Indeed, the use of a co-monomer for III in the

• conditions. CO2 adsorption properties of CTF1–5 The wide morphological and chemical diversity of the as-synthesized CTF samples prompted us to evaluate their CO2 adsorption and separation capacities. To this aim, all materials were firstly activated under ultrahigh vacuum and CO2 isotherms were recorded at T

Porous N- and S-doped carbon–carbon composite electrodes by soft-templating for redox flow batteries

• Maike Schnucklake,
• László Eifert,
• Jonathan Schneider,
• Roswitha Zeis and
• Christina Roth

Beilstein J. Nanotechnol. 2019, 10, 1131–1139, doi:10.3762/bjnano.10.113

• the nitrogen sorption isotherms of the carbonized felt and the N-doped composite electrode is shown. The curves appear distinctively different with a significant hump observed for the doped electrode. With the soft-templating approach it is possible to enhance the surface area of the felts by a factor

• -dispersive X-ray spectroscopy (EDX) analyses were performed with an X-Max 50 silicon drift detector (Oxford Instruments) at an acceleration voltage of 10 kV. Nitrogen adsorption and desorption isotherms were recorded at 77 K using a high-resolution Micromeritics 3Flex instrument. Prior to the measurement the

• electrode and corresponding colored mappings of carbon, nitrogen, oxygen and sulfur. Nitrogen sorption isotherms of the synthesized composite electrode with nitrogen doping (upper line) and the carbonized carbon felt (lower line). High-resolution XPS spectra including the fitting of the carbonized carbon

Glucose-derived carbon materials with tailored properties as electrocatalysts for the oxygen reduction reaction

• Rafael Gomes Morais,
• Natalia Rey-Raap,
• José Luís Figueiredo and
• Manuel Fernando Ribeiro Pereira

Beilstein J. Nanotechnol. 2019, 10, 1089–1102, doi:10.3762/bjnano.10.109

• the response of the electrocatalyst towards the oxygen reduction reaction. Results and Discussion Effect of microporosity The nitrogen adsorption–desorption isotherms and the pore size distributions obtained by applying the quenched solid density functional theory (QSDFT) are presented in Figure 1a

• and 1b, respectively. Activated carbons display isotherms of type I according to the International Union of Pure and Applied Chemistry (IUPAC) classification, attributed to microporous materials. As expected, the volume of nitrogen adsorbed at low relative pressure increases with the time of

• caused to the textural properties due to the surface chemistry changes, nitrogen adsorption–desorption isotherms were obtained (Figure 6). The pore size distributions determined by applying the QSDFT are shown in Supporting Information File 1, Figure S9. Like activated samples shown in Figure 1, modified

Tailoring the stability/aggregation of one-dimensional TiO₂(B)/titanate nanowires using surfactants

• Atiđa Selmani,
• Johannes Lützenkirchen,
• Kristina Kučanda,
• Dario Dabić,
• Engelbert Redel,
• Ida Delač Marion,
• Damir Kralj,
• Darija Domazet Jurašin and
• Maja Dutour Sikirić

Beilstein J. Nanotechnol. 2019, 10, 1024–1037, doi:10.3762/bjnano.10.103

• of 800 nm. The specific surface area of the TNWs, determined from nitrogen adsorption isotherms (BET), was equal to 24.1 m2 g−1. The surface of the TNWs consists of active surface groups that can be either uncharged, positive or negatively charged depending on the pH of the solution. The isoelectric

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

• , to study the porous structures and surface area, N2 adsorption–desorption isotherms and the pore size distribution were analyzed for the Cu/CuO/PCNF/TiO2 composites. To determine the performance of the supercapacitors, the surface area and pore size distribution are two important factors to provide

• and (c) Cu/CuO/PCNF/TiO2 composites and (b, d) corresponding magnified images of (a, c). Inset (b, d) particle size distribution of Cu and TiO2, respectively. (a) N2 adsorption–desorption isotherms of the Cu/CuO/PCNF/TiO2 composite at 77 K and the (b) differential pore volume of the Cu/CuO/PCNF/TiO2

On the transformation of “zincone”-like into porous ZnO thin films from sub-saturated plasma enhanced atomic layer deposition

• Alberto Perrotta,
• Julian Pilz,
• Stefan Pachmajer,
• Antonella Milella and
• Anna Maria Coclite

Beilstein J. Nanotechnol. 2019, 10, 746–759, doi:10.3762/bjnano.10.74

• humidity, resulting in classical adsorption/desorption isotherms, generally categorized according to the IUPAC classification [45][46][47][48]. A type-I isotherm is associated with porous materials with a narrow distribution of pore size with a diameter below 2 nm (nanoporous or microporous materials), and

• isotherms suggested the presence of pores with diameters close to mesoporosity (i.e., 2 nm). Moreover, the crystal orientation of the resulting ZnO layers can be varied from powder to (100) preferential orientation in the out-of-plane direction, showing the possibility to control the resulting ZnO crystal

Ultrathin hydrophobic films based on the metal organic framework UiO-66-COOH(Zr)

• Miguel A. Andrés,
• Clemence Sicard,
• Christian Serre,
• Olivier Roubeau and
• Ignacio Gascón

Beilstein J. Nanotechnol. 2019, 10, 654–665, doi:10.3762/bjnano.10.65

• pattern, SEM image and N2 sorption isotherms at 77 K). Langmuir films of pure MOF sMPs obtained at the air–water interface using diluted suspensions in chloroform showed a lack of reproducibility, which could be ascribed to poor suspension stability, mostly associated with particle aggregation (see

• previously done for Langmuir film fabrication of other materials [38][39][40]. However, although the suspension stability was clearly improved using a 1:4 THF/CHCl3 volume ratio, the reproducibility of the π–A isotherms was not favorable. This result motivated us to seek other means to improve the MOF sMPs

• wt % were tested. Due to the low MOF amounts used, a BA concentration of less than 5 wt % was insufficient for the formation of a BA Langmuir film. For higher BA concentrations, the normalized surface pressure/area isotherms showed lift-off at lower areas per MOF mass in comparison to the bare UiO-66

Improving control of carbide-derived carbon microstructure by immobilization of a transition-metal catalyst within the shell of carbide/carbon core–shell structures

• Teguh Ariyanto,
• Jan Glaesel,
• Andreas Kern,
• Gui-Rong Zhang and
• Bastian J. M. Etzold

Beilstein J. Nanotechnol. 2019, 10, 419–427, doi:10.3762/bjnano.10.41

• °C [29]. Influence of nickel loading on the pore structure of the final carbon material Figure 6a shows the resulting nitrogen-sorption isotherms for varying amounts of nickel loading. The material without graphitization catalyst (CDC-Ni0) shows an isotherm with a wider knee in the low-pressure range

One-step nonhydrolytic sol–gel synthesis of mesoporous TiO₂ phosphonate hybrid materials

• Yanhui Wang,
• P. Hubert Mutin and
• Johan G. Alauzun

Beilstein J. Nanotechnol. 2019, 10, 356–362, doi:10.3762/bjnano.10.35

• formed of densely aggregated, roughly spherical, nanoparticles. For P/Ti ratios of 0.1 and 0.2, the particles were smaller and formed denser aggregates than for lower P/Ti ratios. The nitrogen adsorption–desorption isotherms of the different samples are displayed in Figure 6, except for the TiP0.2 sample

• isotherms of TiO2 and of the hybrid samples are mainly of type IVa, characteristic of mesoporous adsorbents, with an H2 hysteresis loop indicating complex pore structures [38]. The TiP0.02 and TiP0.05 isotherms also showed Type II features (lack of plateau at high relative pressure) suggesting the presence

• powder XRD patterns were collected with a PANalytical X’Pert Pro MPD diffractometer (Cu Kα1 = 0.1540598 nm). The SEM images were obtained with a Hitachi S-4800 electron microscope. EDX was done on an Oxford Instruments X-MaxN SDD instrument. Nitrogen adsorption and desorption isotherms were measured at

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

• thermodynamical properties including pH, adsorption isotherms, competitive adsorption, selectivity and regeneration were studied to investigate the effect of ketoenol–pyridine–furan–silica (SiNL) on the removal of Zn(II), Pb(II), Cd(II) and Cu(II) from aqueous solutions. An increase in adsorption as a function of

• 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

• increase in the retention capacity as a function of the increase in the initial concentration of Zn(II), Pb(II), Cd(II) and Cu(II) metals. The maximum adsorption was achieved gradually after an initial concentration of each metal of about 40 mg·L−1. The adsorption isotherms allow the metal uptake per unit

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

• . The textural properties of the materials were determined from the nitrogen sorption isotherms recorded at 77 K using a Micrometics Tristar 3000 apparatus. Prior to analysis, the samples were outgassed for 14 h under vacuum (0.08 mbar) at 250 °C for calcined materials and at 45 °C for hybrid materials

• ) and (210) diffraction planes of long-range ordered hexagonally packed cylindrical structures (Table S1a, Supporting Information File 1). It should also be mentioned that the N2 sorption isotherms (Figure S3 in Supporting Information File 1) exhibited the typical type-IV shape of mesoporous materials

• was observed for materials synthesized at pH 6.9 (Table S1a and Figure S2 in Supporting Information File 1). This is in accordance with the loss of long range-ordered hexagonal structure, as observed in TEM images. In the sorption isotherms, the sharp adsorption step assigned to mesopore filling in