Highly dispersed TiO2 nanocrystals and WO3 nanorods on reduced graphene oxide: Z-scheme photocatalysis system for accelerated photocatalytic water disinfection

Zeng, Xiangkang; Wang, Zhouyou; Wang, Gen; Gengenbach, Thomas R.; McCarthy, David Thomas; Deletić, Ana; Yu, Jiaguo; Zhang, Xiwang

doi:10.1016/j.apcatb.2017.06.055

Cited by 237 publications

(68 citation statements)

References 62 publications

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“…(a) Possible electron transfer paths for O 2 reduction by TiO 2 /C‐dots/rGO; copyright (2017) Elsevier; (b) TEM image (top left), EDX mapping (top right) of WO 3 ‐rGO‐TiO 2 nanocomposites and schematic diagram for describing the Z‐scheme charge transfer and surface redox reactions for WO 3 ‐rGO‐TiO 2 (bottom); copyright (2017) Elsevier; (c) proposed synergistic photocatalytic bacterial inactivation mechanism by plasmonic Ag‐AgBr‐graphene composite photocatalyst; copyright (2016) Elsevier.…”

Section: Graphene‐based Nanocomposites For Photocatalytic Disinfectionmentioning

confidence: 99%

“…As far as the function of nanomaterial substrate is concerned, graphene has promoted the nucleation of ultrafine WO 3 nanorods and TiO 2 nanoparticles and their homogeneous dispersion with the assistance of glucose, which induced a Z‐scheme charge transfer pathway (Fig. (b)) . The slightly declined photocatalytic activity of the WO 3 ‐rGO‐TiO 2 after several runs has witnessed its perfect reusability.…”

Section: Graphene‐based Nanocomposites For Photocatalytic Disinfectionmentioning

confidence: 99%

“…3(b)). 63 The slightly declined photocatalytic activity of the WO 3 -rGO-TiO 2 after several runs has witnessed its perfect reusability. In an Ag-AgX-graphene composite, photo-induced electrons were soon captured by the graphene substrate, which impeded the reduction of Ag + to Ag and ensured the stability of the system for repetitive use (Fig.…”

Section: D-based Photocatalysts For Water Disinfectionmentioning

confidence: 99%

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Two‐dimensional nanomaterials for photocatalytic water disinfection: recent progress and future challenges

Liu

Zeng

et al. 2018

J of Chemical Tech & Biotech

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Photocatalysis has received ever‐growing attention as a promising alternative to traditional water treatment technologies for waterborne biohazard inactivation. Due to unique optical, electronic, physicochemical properties and feasibility of functional architecture assembly, two‐dimensional (2D) nanomaterials have become important in developing novel photocatalysts. This review summarizes the recent progress in configuring nanostructures with 2D materials as building blocks for photocatalytic water disinfection. In this review, five categories of 2D nanomaterials, that is, graphene, graphitic carbon nitride, 2D metal oxides and metallates, metal oxyhalides and transition metal dichalcogenides, for photocatalytic pathogen inactivation are introduced. First, the synthesis process, nanostructure engineering and disinfection performance of 2D‐based photocatalysts are reviewed in categories. In the following section, the bacteria destruction mechanism based on the generation and roles of reactive species (RSs) is presented. Moreover, the effects of the chemical characteristics of the water matrix on photocatalytic bactericidal performance are discussed. Finally, the challenges regarding the development and application of 2D‐based photocatalysts for highly efficient water sterilization are highlighted. © 2018 Society of Chemical Industry

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Section: Graphene‐based Nanocomposites For Photocatalytic Disinfectionmentioning

confidence: 99%

Section: Graphene‐based Nanocomposites For Photocatalytic Disinfectionmentioning

confidence: 99%

Section: D-based Photocatalysts For Water Disinfectionmentioning

confidence: 99%

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Two‐dimensional nanomaterials for photocatalytic water disinfection: recent progress and future challenges

Liu

Zeng

et al. 2018

J of Chemical Tech & Biotech

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“…[16][17][18][19][20][21][22][23][24] Tungsten carbide (WC) is a famous earth-abundant material with high hardness, high wear resistance, high melting point, and high catalytic activity, and has been widely used in cutting tools, electronics, medical equipment, catalysts and other fields. [25,26] At present, there are many methods for preparing WC, including ball milling, [27] microwave-assisted synthesis, [28] sol-gel, [29] hydrothermal [30] etc. For WC preparation, the carbon source is the most important material, it is of very important significance to explore suitable carbon source with low cost and easy industrialization.…”

Section: Introductionmentioning

confidence: 99%

A Novel Earth‐Abundant W‐WC Heterojunction as Efficient Co‐Catalyst for Enhanced Photocatalytic H₂ Evolution

Zhang

Wang

et al. 2020

ChemCatChem

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New functional materials are of significance for the industry development of coal and tungsten. Here, we reported a novel earth‐abundant W‐WC heterojunction on CdS as an efficient and cheap co‐catalyst for photocatalytic H2 evolution on CdS under visible light irradiation. The W‐WC is simply synthesized from industrial raw material of coal and ammonium tungstate by a simple one‐step calcination strategy. The photocatalytic activities tests show that W‐WC heterojunction has better co‐catalytic performance than W or WC alone, and the optimal photocatalytic activity of W‐WC/CdS reaches 3314 μmol/h/g, which are17.4 and 2.6 times larger than that of CdS and Pt/CdS alone, respectively. Electrochemical tests demonstrate the WC has large specific capacitance and acts as electron reservoir storing the photo‐excited electron from CdS, whereas W mainly acts as the catalytic center. The heterojunction formed between W and WC is favorable for the electron transferring. The different functions of W and WC along with the heterojunction between W and WC account for the superiority of W‐WC. The design and fabrication strategy of the W‐WC heterojunction co‐catalyst benefits for the industrial development of new material and photocatalysis.

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“…Nowadays, there is an increasing trend to develop carbon-based electron mediators such as graphene and carbon nanotubes owing to their high electrical conductivity [12][13][14]. Numerous studies have reported the use of graphene as an electron mediator because of high charge carrier separation capability.…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotubes Incorporated Z-Scheme Assembly of AgBr/TiO2 for Photocatalytic Hydrogen Production under Visible Light Irradiations

et al. 2019

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Photocatalytic H 2 production is a promising strategy toward green energy and alternative to carbon-based fuels which are the root cause of global warming and pollution. In this study, carbon nanotubes (CNTs) incorporated Z-scheme assembly of AgBr/TiO 2 was developed for photocatalytic H 2 production under visible light irradiations. Synthesized photocatalysts were characterized through transmission electron microscope (TEM), X-ray photoelectron spectra (XPS), X-ray diffractometer (XRD), Fourier transform infrared (FTIR), photoluminescence spectra (PL), Brunauer Emmet-Teller(BET), and UV-vis spectroscopy analysis techniques. The composite photocatalysts exhibited a H 2 production of 477 ppm which was three-folds higher than that produced by TiO 2 . The good performance was attributed to the strong interaction of three components and the reduced charge recombination, which was 89 and 56.3 times lower than the TiO 2 and AgBr/TiO 2 . Furthermore, the role of surface acidic and basic groups was assessed and the photocatalytic results demonstrated the importance of surface functional groups. In addition, the composites exhibited stability and reusability for five consecutive cycles of reaction. Thus, improved performance of the photocatalyst was credited to the CNTs as an electron mediator, surface functional groups, higher surface area, enhanced charge separation and extended visible light absorption edge. This work provides new development of Z-scheme photocatalysts for sustainable H 2 production.

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Highly dispersed TiO2 nanocrystals and WO3 nanorods on reduced graphene oxide: Z-scheme photocatalysis system for accelerated photocatalytic water disinfection

Cited by 237 publications

References 62 publications

Two‐dimensional nanomaterials for photocatalytic water disinfection: recent progress and future challenges

Two‐dimensional nanomaterials for photocatalytic water disinfection: recent progress and future challenges

A Novel Earth‐Abundant W‐WC Heterojunction as Efficient Co‐Catalyst for Enhanced Photocatalytic H₂ Evolution

Carbon Nanotubes Incorporated Z-Scheme Assembly of AgBr/TiO2 for Photocatalytic Hydrogen Production under Visible Light Irradiations

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Highly dispersed TiO2 nanocrystals and WO3 nanorods on reduced graphene oxide: Z-scheme photocatalysis system for accelerated photocatalytic water disinfection

Cited by 237 publications

References 62 publications

Two‐dimensional nanomaterials for photocatalytic water disinfection: recent progress and future challenges

Two‐dimensional nanomaterials for photocatalytic water disinfection: recent progress and future challenges

A Novel Earth‐Abundant W‐WC Heterojunction as Efficient Co‐Catalyst for Enhanced Photocatalytic H2 Evolution

Carbon Nanotubes Incorporated Z-Scheme Assembly of AgBr/TiO2 for Photocatalytic Hydrogen Production under Visible Light Irradiations

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A Novel Earth‐Abundant W‐WC Heterojunction as Efficient Co‐Catalyst for Enhanced Photocatalytic H₂ Evolution