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Search for "pollutant" in Full Text gives 76 result(s) in Beilstein Journal of Nanotechnology.

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

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  • the differently exposed crystal faces have different atomic and electronic structures and surface energy. This results in differences in the adsorption capacity regarding pollutant molecules and in the electron transfer properties of TiO2 [8][9]. It is widely believed that the exposed (001) face has a
  • photocatalytic degradation performance of all samples was tested with MB as the target pollutant. Figure 7 representatively shows the temporal evolution of the UV–vis spectra during the photodegradation of aqueous MB over the 2-S2 sample (a) and the variation of the MB concentration C/C0 with time in the
  • of TiO2 to water or organic pollutant molecules is determined by the amount of and the space between oxygen vacancies (or Ti3+) on the surface of the TiO2 particles [50]. The adsorption coefficient (Ae) and the ratio of oxygen vacancies almost uniformly change with RS/Ti. This indicates that the
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Published 01 Nov 2019

Review of advanced sensor devices employing nanoarchitectonics concepts

  • Katsuhiko Ariga,
  • Tatsuyuki Makita,
  • Masato Ito,
  • Taizo Mori,
  • Shun Watanabe and
  • Jun Takeya

Beilstein J. Nanotechnol. 2019, 10, 2014–2030, doi:10.3762/bjnano.10.198

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  • . This sensitivity is sufficient for the detection and monitoring of this persistent pollutant in drinking water. As mentioned previously, the discrimination of chiral substances is a rather tough goal in sensor design. However, the detection of chiral amino acids is an unavoidable matter in technologies
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Published 16 Oct 2019

Materials nanoarchitectonics at two-dimensional liquid interfaces

  • Katsuhiko Ariga,
  • Michio Matsumoto,
  • Taizo Mori and
  • Lok Kumar Shrestha

Beilstein J. Nanotechnol. 2019, 10, 1559–1587, doi:10.3762/bjnano.10.153

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  • rejections of water pollutant surrogates from water [229][230][231]. Considering the high tuning capability of pore-size and functional groups decorating the inner pores of COFs, the separation membranes made out of COFs are promising for water purification technologies including desalination [232
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Published 30 Jul 2019

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

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  • organic pollutant degradation [15]. However, according to previous studies, one limitation to its photocatalytic activity is that the photocatalytic process mainly occurs on the surface of the photocatalyst, which is a problem because the TiO2 nanoparticles readily agglomerate [10]. According to the
  • industries is considered as an key organic pollutant due to its chemical stability, non-biodegradability, high light resistance and oxidation degradation, which may cause long-term damage to ecosystems. Therefore, the photocatalytic activity of the photocatalyst was studied under visible light with RhB as
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Published 16 Jul 2019

Janus-micromotor-based on–off luminescence sensor for active TNT detection

  • Ye Yuan,
  • Changyong Gao,
  • Daolin Wang,
  • Chang Zhou,
  • Baohua Zhu and
  • Qiang He

Beilstein J. Nanotechnol. 2019, 10, 1324–1331, doi:10.3762/bjnano.10.131

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  • catalytic Janus micromotors demonstrates the potential for water pollutant analysis. Results and Discussion The Janus UCNP-functionalized hollow polyelectrolyte capsule micromotors were prepared via a template-assisted method as schematically shown in Figure 1a. Briefly, eight bilayers of poly(allylamine
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Published 28 Jun 2019

A highly efficient porous rod-like Ce-doped ZnO photocatalyst for the degradation of dye contaminants in water

  • Binjing Hu,
  • Qiang Sun,
  • Chengyi Zuo,
  • Yunxin Pei,
  • Siwei Yang,
  • Hui Zheng and
  • Fangming Liu

Beilstein J. Nanotechnol. 2019, 10, 1157–1165, doi:10.3762/bjnano.10.115

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  • rods and optimal synthesis conditions were determined by testing samples with different Ce/ZnO molar ratios calcined at 500 °C for 3 hours via a one-step pyrolysis method. The photocatalytic activity was assessed by the degradation of a common dye pollutant found in wastewater, rhodamine B (RhB), using
  • to improve its photocatalytic activity by modifying its surface morphology [10][11]. Wang et al. [12] prepared Ce-doped ZnO with different doping levels by using a one-step solution method, using methylene blue as the target pollutant for photodegradation. After exposure to light for 200 minutes, the
  • aqueous solutions of ZnO and CZO-4 (8 ppm) were used to measure the specific chemical compositions. Conclusion In this study, we synthesized spherical ZnO and a series of rod-like Ce/ZnO catalysts via high temperature pyrolysis to investigate their photocatalytic performance using RhB as a model pollutant
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Published 03 Jun 2019

Synthesis of novel C-doped g-C3N4 nanosheets coupled with CdIn2S4 for enhanced photocatalytic hydrogen evolution

  • Jingshuai Chen,
  • Chang-Jie Mao,
  • Helin Niu and
  • Ji-Ming Song

Beilstein J. Nanotechnol. 2019, 10, 912–921, doi:10.3762/bjnano.10.92

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  • metal-free organic catalysts with visible-light response, has been extensively used in pollutant elimination, hydrogen production and photoreduction of CO2 because of its facile fabrication, superior physicochemical stability, appropriate energy band structure, and low cost [7][8][9]. Nevertheless, the
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Published 18 Apr 2019

Development of an anti-pollution coating process technology for the application of an on-site PV module

  • Sejin Jung,
  • Wonseok Choi,
  • Jung Hyun Kim and
  • Jang Myoun Ko

Beilstein J. Nanotechnol. 2019, 10, 332–336, doi:10.3762/bjnano.10.32

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  • angles of the fabricated functional coating films were measured using a contact angle analyzer (Phoenix 300 Touch, S.E.O. Co., South Korea). The anti-pollution characteristics were measured using permanent markers instead of actual pollutants. This method is useful for checking the level of pollutant
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Published 01 Feb 2019

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

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  • minimizing the sum of squared differences between the experimental and predicted values of the dependent variable using the quasi-Newton least squares algorithm. Pathogenic pollutant removal To evaluate the efficiency of 2Z-HYCA for pathogen removal from water in a real application, commercial Eva® drinking
  • interesting both from stability and surface area aspects. Pollutant removal from aqueous solutions Removal of 4-nitrophenol We have previously reported that a first-generation HYCA material prepared via a low-temperature calcination process in air very efficiently adsorbs cationic pollutants such as Pb2+, Cd2
  • of the highly negatively charged original HYCA material [1] and provides sites for the adsorption of anionic pollutants, such as 4-nitrophenol.While used as a model compound here, 4-nitrophenol is an organic anionic pollutant of high interest because acute exposure to 4-nitrophenol causes blood
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Published 09 Jan 2019

Impact of the anodization time on the photocatalytic activity of TiO2 nanotubes

  • Jesús A. Díaz-Real,
  • Geyla C. Dubed-Bandomo,
  • Juan Galindo-de-la-Rosa,
  • Luis G. Arriaga,
  • Janet Ledesma-García and
  • Nicolas Alonso-Vante

Beilstein J. Nanotechnol. 2018, 9, 2628–2643, doi:10.3762/bjnano.9.244

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  • a different approach, Marien et al. observed a relation between the morphological features of TNTs and a higher yield in the degradation of Paraquat [27]. They proposed that the PCA of nanotubes is compromised by the length of these structures due to the diffusivity of the pollutant into the inner
  • along the [004] direction [44], accompanied by a higher photocatalytic performance in the degradation of an organic pollutant [45]. Lee et al. also reported an enhanced photoelectrochemical behavior in photovoltaic devices ascribed to the preferred crystalline orientation due to faster electron
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Published 04 Oct 2018

Nanocellulose: Recent advances and its prospects in environmental remediation

  • Katrina Pui Yee Shak,
  • Yean Ling Pang and
  • Shee Keat Mah

Beilstein J. Nanotechnol. 2018, 9, 2479–2498, doi:10.3762/bjnano.9.232

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  • sulphate groups. Alternatively, amine modification aids the chelating action on the desired pollutant anions, thereby enhancing the adsorption capacity of the nanocellulose adsorbent materials. Metal ions can adsorb onto the adsorbent via electrostatic interaction and ion exchange since amino groups are
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Published 19 Sep 2018

Hierarchical heterostructures of Bi2MoO6 microflowers decorated with Ag2CO3 nanoparticles for efficient visible-light-driven photocatalytic removal of toxic pollutants

  • Shijie Li,
  • Wei Jiang,
  • Shiwei Hu,
  • Yu Liu,
  • Yanping Liu,
  • Kaibing Xu and
  • Jianshe Liu

Beilstein J. Nanotechnol. 2018, 9, 2297–2305, doi:10.3762/bjnano.9.214

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  • attributed to the high charge-separation capacity, which results from the matched band alignment of the two components. The cycling experiments showed a good durability of Ag2CO3/Bi2MoO6. Holes were found to be the dominant active species accounting for the pollutant degradation. This compound is a promising
  • candidate for wastewater treatment. Keywords: antibiotic removal; Bi2MoO6; heterojunction; silver carbonate (Ag2CO3); Introduction Industrial pollutants, such as industrial dyes and antibiotics, in wastewaters pose a huge threat to the environment [1][2]. Thus, many methods for pollutant removal have been
  • Bi2MoO6, which originates from the increased charge separation at the interface [22][23][24][25][26][27][28][29][30]. Recently, Ag-based compounds (e.g., Ag3PO4, Ag3VO4, Ag2CrO4, and Ag2CO3) [34][35][36] have emerged as good VLD photocatalysts for pollutant removal. Ag2CO3 exhibits a high visible-light
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Published 27 Aug 2018

Synthesis of a MnO2/Fe3O4/diatomite nanocomposite as an efficient heterogeneous Fenton-like catalyst for methylene blue degradation

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

Beilstein J. Nanotechnol. 2018, 9, 1940–1950, doi:10.3762/bjnano.9.185

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  • nanocomposite is synthesized and then used as heterogeneous Fenton-like catalyst to degrade the organic pollutant methylene blue (MB) with the activation of PMS. The characterization results show that the Fe3O4 nanoparticles and nanoflower-like MnO2 are evenly distributed layer-by-layer on the surface of
  • can not be degraded spontaneously, thus various methods focusing on the removal of organic pollutant, including adsorption, photocatalysis and advanced oxidation processes, have been extensively studied over the past decades [2][4][5]. Among these methods, advanced oxidation processes (AOP) are
  • methylene blue (MB) as the target pollutant, because MB is a typical organic dye with well-known toxicity and a threat to water environments [19]. The structural characterization and recyclability of the nanocomposite are also investigated. To the best of our knowledge, there are no reports about the
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Published 06 Jul 2018

Cr(VI) remediation from aqueous environment through modified-TiO2-mediated photocatalytic reduction

  • Rashmi Acharya,
  • Brundabana Naik and
  • Kulamani Parida

Beilstein J. Nanotechnol. 2018, 9, 1448–1470, doi:10.3762/bjnano.9.137

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  • considerable attention. The applications of photocatalysis, such as water splitting, CO2 reduction, pollutant degradation, organic transformation reactions, N2 fixation, etc., towards solving the energy crisis and environmental issues are briefly discussed in the Introduction of this review. The advantages of
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Published 16 May 2018

Ag2WO4 nanorods decorated with AgI nanoparticles: Novel and efficient visible-light-driven photocatalysts for the degradation of water pollutants

  • Shijie Li,
  • Shiwei Hu,
  • Wei Jiang,
  • Yanping Liu,
  • Yu Liu,
  • Yingtang Zhou,
  • Liuye Mo and
  • Jianshe Liu

Beilstein J. Nanotechnol. 2018, 9, 1308–1316, doi:10.3762/bjnano.9.123

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  • Abstract To develop efficient and stable visible-light-driven (VLD) photocatalysts for pollutant degradation, we synthesized novel heterojunction photocatalysts comprised of AgI nanoparticle-decorated Ag2WO4 nanorods via a facile method. Various characterization techniques, including XRD, SEM, TEM, EDX
  • still achieves the highest apparent rate constant (0.0292 min−1 for MO degradation and 0.0129 min−1 for 4-CP degradation) among all these samples. The mineralization of organic pollutants is crucial for pollutant treatment [46]. Thus, the total organic carbon (TOC) removal efficiency of RhB over 0.3AgI
  • the CB of AgI (and more holes left behind in the valence band (VB)) could readily attack the pollutant molecules, resulting in the remarkable photocatalytic performance of AgI/Ag2WO4. Conclusion In summary, a novel heterojunction photocatalyst comprised of AgI nanoparticle-decorated Ag2WO4 nanorods
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Published 27 Apr 2018

Review on nanoparticles and nanostructured materials: history, sources, toxicity and regulations

  • Jaison Jeevanandam,
  • Ahmed Barhoum,
  • Yen S. Chan,
  • Alain Dufresne and
  • Michael K. Danquah

Beilstein J. Nanotechnol. 2018, 9, 1050–1074, doi:10.3762/bjnano.9.98

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Published 03 Apr 2018

Surface-plasmon-enhanced ultraviolet emission of Au-decorated ZnO structures for gas sensing and photocatalytic devices

  • T. Anh Thu Do,
  • Truong Giang Ho,
  • Thu Hoai Bui,
  • Quang Ngan Pham,
  • Hong Thai Giang,
  • Thi Thu Do,
  • Duc Van Nguyen and
  • Dai Lam Tran

Beilstein J. Nanotechnol. 2018, 9, 771–779, doi:10.3762/bjnano.9.70

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  • and support the design of efficient NO2 gas sensing and photocatalysis devices. The effects of Au NPs on the performance of ZnO-based gas sensors were also investigated at an optimized operating temperature of 120 °C towards pollutant gases in a wide range of concentrations. The enhanced sensitivity
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Published 01 Mar 2018

A review of carbon-based and non-carbon-based catalyst supports for the selective catalytic reduction of nitric oxide

  • Shahreen Binti Izwan Anthonysamy,
  • Syahidah Binti Afandi,
  • Mehrnoush Khavarian and
  • Abdul Rahman Bin Mohamed

Beilstein J. Nanotechnol. 2018, 9, 740–761, doi:10.3762/bjnano.9.68

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  • removed because of its propensity to dissolve in water. Thus, the difficulty in NO elimination is the main challenge in NOx gas removal. In fact, NO is the main pollutant, representing about 90% of total NOx [2]. The main source of NOx emissions is dominated by stationary sources, which originate from
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Published 27 Feb 2018

Perovskite-structured CaTiO3 coupled with g-C3N4 as a heterojunction photocatalyst for organic pollutant degradation

  • Ashish Kumar,
  • Christian Schuerings,
  • Suneel Kumar,
  • Ajay Kumar and
  • Venkata Krishnan

Beilstein J. Nanotechnol. 2018, 9, 671–685, doi:10.3762/bjnano.9.62

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  • a colorless, non-photosensitizing pollutant, bisphenol A (BPA). The superior photocatalytic performance of the CTCN heterojunction could be attributed to the appropriate band positions, close interfacial contact between the constituents and extended light absorption (both UV and visible region), all
  • degradation of pollutants has been proposed and discussed. Keywords: CaTiO3; graphitic carbon nitride (g-C3N4); heterojunction photocatalyst; pollutant degradation; Introduction Photocatalysis is recognized as an attractive approach for environmental remediation and energy generation applications due to its
  • of a wide band gap material with a low band gap material [30]. Natarajan et al. have demonstrated the enhanced degradation of isoniazid (a pharmaceutical pollutant) over the g-C3N4–TiO2 nanocomposite via a direct Z-scheme charge transfer mechanism [31]. The enhanced photocatalytic activity has been
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Published 21 Feb 2018

Mechanistic insights into plasmonic photocatalysts in utilizing visible light

  • Kah Hon Leong,
  • Azrina Abd Aziz,
  • Lan Ching Sim,
  • Pichiah Saravanan,
  • Min Jang and
  • Detlef Bahnemann

Beilstein J. Nanotechnol. 2018, 9, 628–648, doi:10.3762/bjnano.9.59

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  • generated in this order by the stepwise oxidation of H2O. On the other hand, the stepwise reduction of O2 generates •O2−, H2O2 and •OH. The detection or quantification of these ROSs in the presence of a reactant pollutant is crucial for practical applications and such quantification can be correlated to the
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Published 19 Feb 2018

Influence of the preparation method on the photocatalytic activity of Nd-modified TiO2

  • Patrycja Parnicka,
  • Paweł Mazierski,
  • Tomasz Grzyb,
  • Wojciech Lisowski,
  • Ewa Kowalska,
  • Bunsho Ohtani,
  • Adriana Zaleska-Medynska and
  • Joanna Nadolna

Beilstein J. Nanotechnol. 2018, 9, 447–459, doi:10.3762/bjnano.9.43

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  • light-induced degradation of the model pollutant in aqueous solution. Keywords: heterogeneous photocatalysis; hydrothermal method; modified TiO2; neodymium; sol–hydrothermal method; Introduction Heterogeneous photocatalysis based on titanium dioxide (TiO2) has become the focus of numerous studies due
  • toluene concentration decreased in the dark experiment by approximately 6.5% for all samples, probably pollutant was adsorbed on the surface of TiO2 and on the walls of the reactor. A correlation between photocatalytic activity measured in both model reactions and the BET surface area was not observed
  • scavengers confirm that superoxide radicals were responsible for the visible-light degradation of the model pollutant in aqueous solution. Experimental Materials Titanium(IV) butoxide (97%, TBOT) and Nd(NO3)3·6H2O (99.99%) were purchased from Sigma-Aldrich, Poland. Nitric acid (65%) and hydrochloric acid (31
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Published 06 Feb 2018

Facile synthesis of ZnFe2O4 photocatalysts for decolourization of organic dyes under solar irradiation

  • Arjun Behera,
  • Debasmita Kandi,
  • Sanjit Manohar Majhi,
  • Satyabadi Martha and
  • Kulamani Parida

Beilstein J. Nanotechnol. 2018, 9, 436–446, doi:10.3762/bjnano.9.42

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  • can be described by the following equations: Hence the net reaction is Rh B/CR + •OH + •O2− → decolourization. Degradation of phenol In order to show its versatility, the ZFO-500 photocatalyst was also tested in degradation of colourless organic pollutants. We have used phenol as a model pollutant
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Published 05 Feb 2018

Sugarcane juice derived carbon dot–graphitic carbon nitride composites for bisphenol A degradation under sunlight irradiation

  • Lan Ching Sim,
  • Jing Lin Wong,
  • Chen Hong Hak,
  • Jun Yan Tai,
  • Kah Hon Leong and
  • Pichiah Saravanan

Beilstein J. Nanotechnol. 2018, 9, 353–363, doi:10.3762/bjnano.9.35

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  • irradiate photocatalytic degradation of organic pollutant (since CDs could act as a photosensitizer over the entire solar spectrum) and (ii) acknowledgement that the most reported bioprecursor-derived CDs and g-C3N4 composite are limited to the photocatalytic generation of H2 (instead limited attempts have
  • been performed on the removal of the organic pollutant since foremost discovery by Prasannan and Imae [8]). Collectively, considering all of the aforementioned problems, it provokes the idea that the combination of g-C3N4 with CDs produced from sugarcane juice can be used for the photocatalytic
  • degradation of endocrine disrupting chemicals (EDCs). Bisphenol A (BPA) was chosen as a model pollutant under natural sunlight irradiation. Herein, the structural and optical properties of samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), photoluminescence
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Published 30 Jan 2018

CdSe nanorod/TiO2 nanoparticle heterojunctions with enhanced solar- and visible-light photocatalytic activity

  • Fakher Laatar,
  • Hatem Moussa,
  • Halima Alem,
  • Lavinia Balan,
  • Emilien Girot,
  • Ghouti Medjahdi,
  • Hatem Ezzaouia and
  • Raphaël Schneider

Beilstein J. Nanotechnol. 2017, 8, 2741–2752, doi:10.3762/bjnano.8.273

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  • concentration of the pollutant. First, we investigated the influence of the catalyst concentration (25, 50 or 100 mg in 50 mL of RhB solution) (Figure 7a). Using 25 mg of the CdSe (2 wt %)/TiO2 photocatalyst, the dye decomposition required 255 min while the degradation could be achieved within 75 min using 100
  • photodegradation. Finally, although the operating conditions and the structure of the pollutant were different from those used in this study, the CdSe NR/TiO2 nanoparticle photocatalyst favorably compares with catalysts engineered from CdSe quantum dots and TiO2 nanoparticles or nanotubes [9][11][12][22][26][31
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Published 19 Dec 2017

Two-dimensional carbon-based nanocomposites for photocatalytic energy generation and environmental remediation applications

  • Suneel Kumar,
  • Ashish Kumar,
  • Ashish Bahuguna,
  • Vipul Sharma and
  • Venkata Krishnan

Beilstein J. Nanotechnol. 2017, 8, 1571–1600, doi:10.3762/bjnano.8.159

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  • sustainable source for energy generation and environmental remediation, photocatalytic water splitting and photocatalytic pollutant degradation have recently gained significant importance. Research in this field is aimed at solving the global energy crisis and environmental issues in an ecologically-friendly
  • properties, carbon-based nanocomposites have made a substantial contribution towards the generation of clean, renewable and viable forms of energy from light-based water splitting and pollutant removal. This review article provides a comprehensive overview of the recent research progress in the field of
  • ]. Hence, in the recent decade, heterogeneous photocatalysis has been widely explored for the conversion of solar energy into chemical energy and for pollutant removal from water [11][12]. Up to now, various interesting semiconductors such as TiO2, ZnO, WO3, CdS, Bi2O3, Fe2O3, SnO2, BiVO4, etc. have been
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Published 03 Aug 2017
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