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Onjwaya AO, Malati ML, Ngila JC, Dlamini LN. Interfacial engineering of a multijunctional In 2O 3/WO 3@Ti 4N 3T x S-scheme photocatalyst with enhanced photoelectrochemical properties. Dalton Trans 2024; 53:7694-7710. [PMID: 38597481 DOI: 10.1039/d4dt00135d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
Achieving high photoelectrochemical conversion efficiency requires the logical layout of a composite photocatalyst with optimal charge separation and transfer with ideal light harvesting capabilities to enhance the photocatalytic performance and the degradation rate towards organic pollutants. Herein, a novel In2O3/WO3@Ti4N3Tx S-scheme heterojunction was successfully synthesized and confirmed through valence band VB-XPS and Mott Schottky combined analysis. The formed MXene-doped In2O3/WO3@Ti4N3Tx S-scheme significantly enhances the charge flow and spatial separation with an improved oxidation and reduction ability. An in-built interfacial electric field at the WO3-In2O3 boundary enhanced the light-harvesting capacity, whereas Ti4N3Tx MXene offers a unique electron trapping effect which effectively lowers high charge carrier recombination rate-related photocatalytic deficit. It preserves the exceptional redox potency of the photocatalyst by providing a directed acceleration and effective separation of the photogenerated charges. A high carrier density (ND = 7.83 × 1021 cm-3) with a lower negative flat band (VFB = -0.064 V vs. Ag/AgCl) was obtained by Mott-Schottky analysis for 3 wt% In2O3/WO3@Ti4N3Tx, an indicator that a low overpotential is needed to activate photocatalytic reactions. This study, therefore, provides a novel thought for the design and fabrication of an S-scheme heterojunction for photocatalytic reactions for mineralization of organic pollutants in water and clean energy production.
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Affiliation(s)
- Antony Okinyi Onjwaya
- University of Johannesburg, Doornfontein Campus, Department of Chemical Science, P.O. Box 17011, Doornfontein Campus, 2028, Johannesburg, South Africa.
| | - Majahekupheleni Livileyise Malati
- University of Johannesburg, Doornfontein Campus, Department of Chemical Science, P.O. Box 17011, Doornfontein Campus, 2028, Johannesburg, South Africa.
| | - Jane Catherine Ngila
- University of Johannesburg, Doornfontein Campus, Department of Chemical Science, P.O. Box 17011, Doornfontein Campus, 2028, Johannesburg, South Africa.
| | - Langelihle Nsikayezwe Dlamini
- University of Johannesburg, Doornfontein Campus, Department of Chemical Science, P.O. Box 17011, Doornfontein Campus, 2028, Johannesburg, South Africa.
- Centre for Nanomaterials Science Research, University of Johannesburg, South Africa
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Alfonso-Herrera LA, Rodríguez-Girón JS, de Sampedro HIG, Sánchez-Martínez D, Navarrete-López AM, Beltrán HI. Elucidating Structural Stability, Bandgap, and Photocatalytic Hydrogen Evolution of (H 2O/DMF)@HKUST-1 Host-Guest Systems. Chempluschem 2024; 89:e202300579. [PMID: 38116999 DOI: 10.1002/cplu.202300579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/19/2023] [Accepted: 12/20/2023] [Indexed: 12/21/2023]
Abstract
The H2O@HKUST-1 and DMF@HKUST-1 systems were experimental and computationally assessed, employing XRD/TGA/FT-IR/DFT-calculations, evidencing that H2O or DMF coordinated to Cu, modulating HKUST-1 photocatalytic properties. DMF@HKUST-1 has narrower bandgap promoting higher-crystallinity and light-harvesting. H2O@HKUST-1 showed smaller particle sizing and sharp morphology. Theoretical models, (H2O)1@HKUST-1 and (DMF)1@HKUST-1, containing one coordinated molecule, elucidated bandgap modulation associated with infiltration. H2O@HKUST-1/DMF@HKUST-1 presented bandgaps [eV] of 3.6/3.4, by Tauc plots, and 3.55/3.26, by theoretical calculations, narrowing bandgap, compared with non-solvated HKUST-1(HKUST-1NS). Both composites raised the valence band (VB) and lowered the conduction band (CB), but DMF@HKUST-1 most raised VB. Topological analysis revealed that guests i) with higher electronic density, raised VB, and ii) induced π-backbonding, lowering CB. DMF@HKUST-1 presented a higher photocatalytic hydrogen evolution (μmol), 26.45, in the first 30 min of the reaction, nevertheless, H2O@HKUST-1 presented a competitive activity, of 17.32. In large periods, H2O@HKUST-1/DMF@HKUST-1 showed practically the same hydrogen evolution, 45.50/49.03.
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Affiliation(s)
- Luis A Alfonso-Herrera
- Departamento de Ciencias Básicas, DCBI, UAM Unidad Azcapotzalco, Av. San Pablo 420, Col. Nueva Rosario, Alc. Azcapotzalco, 02128, CDMX, México
| | - Jesús S Rodríguez-Girón
- Departamento de Ecomateriales y Energía, Facultad de Ingeniería Civil, Universidad Autónoma de Nuevo León, UANL, Av. Universidad S/N Ciudad Universitaria, 64455, San Nicolás de Los Garza, Nuevo León, México
| | - Héctor I González de Sampedro
- Departamento de Ciencias Básicas, DCBI, UAM Unidad Azcapotzalco, Av. San Pablo 420, Col. Nueva Rosario, Alc. Azcapotzalco, 02128, CDMX, México
| | - Daniel Sánchez-Martínez
- Departamento de Ecomateriales y Energía, Facultad de Ingeniería Civil, Universidad Autónoma de Nuevo León, UANL, Av. Universidad S/N Ciudad Universitaria, 64455, San Nicolás de Los Garza, Nuevo León, México
| | - Alejandra M Navarrete-López
- Departamento de Ciencias Básicas, DCBI, UAM Unidad Azcapotzalco, Av. San Pablo 420, Col. Nueva Rosario, Alc. Azcapotzalco, 02128, CDMX, México
| | - Hiram I Beltrán
- Departamento de Ciencias Básicas, DCBI, UAM Unidad Azcapotzalco, Av. San Pablo 420, Col. Nueva Rosario, Alc. Azcapotzalco, 02128, CDMX, México
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Photocatalytic Degradation of Phenol and its Derivatives over ZnFe Layered Double Hydroxide. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Jeyavani V, Mukherjee SP. Crystal Phase and Morphology-Controlled Synthesis of Tungsten Oxide Nanostructures for Remarkably Ultrafast Adsorption and Separation of Organic Dyes. Inorg Chem 2022; 61:18119-18134. [DOI: 10.1021/acs.inorgchem.2c02715] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Vijayakrishnan Jeyavani
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pashan, Pune411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad201002, India
| | - Shatabdi Porel Mukherjee
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pashan, Pune411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad201002, India
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Altowyan AS, Shaban M, Faidey ZM, Abdelkarem K, Al-Dossari M, Abd El-Gawaad NS, Kordy MGM. Design and Characterization of Zeolite/Serpentine Nanocomposite Photocatalyst for Solar Hydrogen Generation. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6325. [PMID: 36143637 PMCID: PMC9502782 DOI: 10.3390/ma15186325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/13/2022] [Accepted: 08/15/2022] [Indexed: 06/16/2023]
Abstract
In this work, a low-cost, high-yield hydrothermal treatment was used to produce nanozeolite (Zeo), nanoserpentine (Serp), and Zeo/Serp nanocomposites with weight ratios of 1:1 and 2:1. At 250 °C for six hours, the hydrothermal treatment was conducted. Various methods are used to explore the morphologies, structures, compositions, and optical characteristics of the generated nanostructures. The morphological study revealed structures made of nanofibers, nanorods, and hybrid nanofibril/nanorods. The structural study showed clinoptilolite monoclinic zeolite and antigorite monoclinic serpentine with traces of talcum mineral and carbonates. As a novel photoelectrochemical catalyst, the performance of the Zeo/Serp (2:1) composite was evaluated for solar hydrogen generation from water splitting relative to its constituents. At -1 V, the Zeo/Serp (2:1) composite produced a maximum current density of 8.44 mA/g versus 7.01, 6.74, and 6.6 mA/g for hydrothermally treated Zeo/Serp (1:1), Zeo, and Serp, respectively. The Zeo/Serp (2:1) photocatalysts had a solar-to-hydrogen conversion efficiency (STH) of 6.5% and an estimated hydrogen output rate of 14.43 mmole/h.g. Consequently, the current research paved the way for low-cost photoelectrochemical catalytic material for efficient solar hydrogen production by water splitting.
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Affiliation(s)
- Abeer S. Altowyan
- Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Mohamed Shaban
- Nanophotonics and Applications Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
- Department of Physics, Faculty of Science, Islamic University of Madinah, P.O. Box 170, Al Madinah Al Monawara 42351, Saudi Arabia
| | - Zeinab M. Faidey
- Nanophotonics and Applications Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
- Geology Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Khaled Abdelkarem
- Nanophotonics and Applications Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Mawaheb Al-Dossari
- Department of Physics, Faculty of Science, King Khalid University, Abha 62529, Saudi Arabia
| | - N. S. Abd El-Gawaad
- Faculty of Science, King Khalid University, Mohayel Asser, Abha 61421, Saudi Arabia
| | - Mohamed G. M. Kordy
- Nanophotonics and Applications Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt
- Biochemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62521, Egypt
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Moscow S, Kavinkumar V, Sriramkumar M, Jothivenkatachalam K, Saravanan P, Rajamohan N, Vasseghian Y, Rajasimman M. Impact of Erbium (Er) and Yttrium (Y) doping on BiVO 4 crystal structure towards the enhancement of photoelectrochemical water splitting and photocatalytic performance. CHEMOSPHERE 2022; 299:134343. [PMID: 35307389 DOI: 10.1016/j.chemosphere.2022.134343] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 03/03/2022] [Accepted: 03/14/2022] [Indexed: 06/14/2023]
Abstract
An efficient BiVO4nanocatalyst with Erbium (Er) and Yttrium (Y) doping was synthesized via a facile microwave irradiation route and the obtained materials were further characterized through various techniques such as p-XRD, FT-IR, FE-SEM, HR-TEM, UV-Vis DRS, PL, LSV, and EISanalysis. The obtained results revealed that the rare metals induce the stabilization of the monoclinic-tetragonal crystalline structure with a distinct morphology. The yttrium doped BiVO4 (Y-BiVO4) monoclinic-tetragonal exhibited anefficient photoelectrochemical water splitting and photocatalytic performanceare compared to bare BiVO4. TheY-BiVO4 indicated increased results of photocurrent of 0.43 mA/cm2and bare BiVO40.24 mA/cm2. Also, the Y-doped BiVO4 nanocatalyst showed the maximum photocatalytic activity for the degradation of MB, MO, and RhB. A maximum degradation of 93%, 85%, and 91% was achieved for MB, MO, and RhB respectively, within 180 min under the visible light illumination. The photocatalytic decomposition of acetaldehyde also was performed. The improved photoelectrochemical water splitting and photocatalytic activity are due to the narrowing the bandgap, leading to extending the photoabsorption capability and reducing the recombination rate of photoexcited electron-hole pairs through the formation inner energy state of the rare earth metals. The current study disclosed that the synthesis of nanomaterials with crystal modification could be a prospectivecontender forhydrogen energy production as well as to the photocatalytic degradation of organic pollutants.To the best of our knowledge, both photocatalytic and photoelectrochemical studies were never been reported before for this type of material.
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Affiliation(s)
- Subramanian Moscow
- Materials Research Laboratory for Energy and Environmental Applications, Department of Chemistry, Anna University, UCE-BIT Campus, Tiruchirappalli, 620 024, Tamilnadu, India.
| | - Veerappan Kavinkumar
- Materials Research Laboratory for Energy and Environmental Applications, Department of Chemistry, Anna University, UCE-BIT Campus, Tiruchirappalli, 620 024, Tamilnadu, India
| | - Masilamani Sriramkumar
- Materials Research Laboratory for Energy and Environmental Applications, Department of Chemistry, Anna University, UCE-BIT Campus, Tiruchirappalli, 620 024, Tamilnadu, India
| | - Kandasamy Jothivenkatachalam
- Materials Research Laboratory for Energy and Environmental Applications, Department of Chemistry, Anna University, UCE-BIT Campus, Tiruchirappalli, 620 024, Tamilnadu, India.
| | - Panchamoorthy Saravanan
- Department of Petrochemical Technology, UCE - BIT Campus, Anna University, Tiruchirappalli, 620 024, Tamilnadu, India
| | | | - Yasser Vasseghian
- Department of Chemistry, Soongsil University, Seoul, 06978, South Korea
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Moscow S, Kavinkumar V, Sriramkumar M, Kalaikathir SPR, Jothivenkatachalam K, Fu Y, Anandan S. Synthesis of Sn and Zr‐Doped BiVO
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Nanocatalyst with Enhanced Photocatalytic and Photoelectrochemical Activity. ChemistrySelect 2022. [DOI: 10.1002/slct.202104000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Subramanian Moscow
- Department of Chemistry Materials Research Laboratory for Energy and Environmental Applications Anna University- BIT Campus Tiruchirappalli 620 024 Tamilnadu India
| | - Veerappan Kavinkumar
- Department of Chemistry Materials Research Laboratory for Energy and Environmental Applications Anna University- BIT Campus Tiruchirappalli 620 024 Tamilnadu India
| | - Masilamani Sriramkumar
- Department of Chemistry Materials Research Laboratory for Energy and Environmental Applications Anna University- BIT Campus Tiruchirappalli 620 024 Tamilnadu India
| | | | - Kandasamy Jothivenkatachalam
- Department of Chemistry Materials Research Laboratory for Energy and Environmental Applications Anna University- BIT Campus Tiruchirappalli 620 024 Tamilnadu India
| | - Yen‐Pei Fu
- Department of Materials Science and Engineering National Dong Hwa University, Shou-Feng Hualien 97401 Taiwan
| | - Srinivasan Anandan
- Center for Nano-materials,International Advanced Research Centre for Powder Metallurgy & New Materials (ARCI) Bolapur (P.O.) Hyderabad 500 005 Andhra Pradesh India
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Umejuru E, Prabakaran E, Pillay K. Coal Fly Ash Decorated with Graphene Oxide-Tungsten Oxide Nanocomposite for Rapid Removal of Pb 2+ Ions and Reuse of Spent Adsorbent for Photocatalytic Degradation of Acetaminophen. ACS OMEGA 2021; 6:11155-11172. [PMID: 34056271 PMCID: PMC8153921 DOI: 10.1021/acsomega.0c04194] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 01/28/2021] [Indexed: 05/03/2023]
Abstract
Coal fly ash was decorated with a graphene oxide-tungsten oxide nanorods nanocomposite (CFA/GO/WO3NRs nanocomposite) via a hydrothermal method and applied for the remediation of lead (Pb2+ ions). The Pb2+ ion-loaded spent adsorbent (CFA/GO/WO3NRs + Pb2+ nanocomposite) was reused for the photodegradation of acetaminophen. CFA/GO/WO3NRs + Pb2+ nanocomposite displayed rapid removal of Pb2+ ions. Pseudo-second-order kinetics and the Langmuir isotherm model described the adsorption data. The adsorption capacity of the CFA/GO/WO3NRs nanocomposite was 41.51 mg/g for the removal of Pb2+ ions. Additionally, the Pb2+ ion-loaded spent adsorbent significantly influenced the degradation of acetaminophen by photocatalysis where 93% degradation was observed. It is worthy to note the reuse application of Pb2+ ion-loaded spent adsorbent as a photocatalyst, which will significantly reduce the secondary waste obtained from conventional adsorption methods.
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Affiliation(s)
- Emmanuel
Christopher Umejuru
- Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, Johannesburg 2028, South Africa
| | - Eswaran Prabakaran
- Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, Johannesburg 2028, South Africa
| | - Kriveshini Pillay
- Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, Johannesburg 2028, South Africa
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Facile synthesis and characterization of WO3/CuWO4 nanocomposites for the removal of toxic methylene blue dye. KOREAN J CHEM ENG 2021. [DOI: 10.1007/s11814-021-0756-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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González Rodríguez LM, Pinedo Escobar JA, Piedra López JG, De Haro Del Rio DA, Suarez Vázquez SI, Carrillo Martínez CJ, Solis CG, Chulim AC. Synthesis, characterization and photocatalytic activity evaluation of WO3, TiO2 and WO3/TiO2 supported on zeolite faujasite. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2020. [DOI: 10.1515/ijcre-2020-0095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe present investigation is focused on the preparation, characterization, and photocatalytic activity evaluation of TiO2/zeolite, WO3/zeolite, WO3/TiO2/zeolite, and WO3/TiO2 composites. Zeolite fujasite (FAU) was synthesized by the hydrothermal method, while the semiconductor/zeolite composites by a straightforward physical mixture and calcination treatment. The photocatalytic activity of the materials was evaluated through the methyl orange (MO) degradation under near-UV irradiation (365 nm). The photocatalysts were characterized by X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscope (SEM), Energy-dispersive X-ray Spectroscopy (EDX), UV–vis diffuse reflectance spectroscopy and nitrogen physisorption. Results indicated that TiO2, WO3, and Zeolite Y kept their crystalline phases after the preparation method. TiO2 and WO3 particles were distributed on zeolite surface. Also, no significant changes in the band gap energies of the photocatalysts were found. The surface area of zeolite FAU decreased with the addition of TiO2 and WO3. The best MO degradation under near-UV irradiation was obtained with WO3/TiO2 heterojunction and TiO2 P25, no synergistic effect was found between semiconductors and zeolite FAU. Additionally, the kinetic data of the photocatalytic elimination of MO with all photocatalysts under near-UV radiation was investigated with several models: Zero-order, First-Order, Second Order, Modified Freundlich and Parabolic Diffusion, they were consistent with Modified Freundlich model. The effect of initial pH and photocatalyst weight was explored for TiO2/Zeolite composite and it was found that the best MO degradation was obtained at natural pH of 10.3 and 0.2 g of composite was the optimal amount of photocatalyst. Finally, the positive hole formation in all photocatalysts was detected by UV–vis spectroscopy and it was discovered that the highest density of positive holes was obtained with TiO2/zeolite composite.
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Affiliation(s)
- Luis Mario González Rodríguez
- Unidad Profesional Interdisciplinaria de Ingeniería Campus Zacatecas, Instituto Politécnico Nacional, Blvd. El Bote s/n Cerro del Gato, Ejido La Escondida, Col. Cd Administrativa, Zacatecas, 98160, México
| | - José Alfonso Pinedo Escobar
- Unidad Académica de Ciencias Químicas, Universidad Autónoma de Zacatecas, Campus Siglo XXI Edificio 6, Carr. a Gdl km 6.0, Ejido La Escondida, Zacatecas, 98160, México
| | - Jessica Guadalupe Piedra López
- Unidad Profesional Interdisciplinaria de Ingeniería Campus Zacatecas, Instituto Politécnico Nacional, Blvd. El Bote s/n Cerro del Gato, Ejido La Escondida, Col. Cd Administrativa, Zacatecas, 98160, México
| | - David Alejandro De Haro Del Rio
- Universidad Autónoma de Nuevo León, Facultad de Ciencias Químicas, Ave. Universidad S/N, Cd. Universitaria, San Nicolás de los GarzaNL, C.P. 66455, México
| | - Santiago Ivan Suarez Vázquez
- Universidad Autónoma de Nuevo León, Facultad de Ingeniería Civil, Ave. Universidad S/N, Cd. Universitaria, San Nicolás de los GarzaNL, C.P. 66455, México
| | - Cristina Jared Carrillo Martínez
- Unidad Académica de Ciencias Químicas, Universidad Autónoma de Zacatecas, Campus Siglo XXI Edificio 6, Carr. a Gdl km 6.0, Ejido La Escondida, Zacatecas, 98160, México
| | - Christian Gomez Solis
- Universidad de Guanajuato, División de Ciencias e Ingeniería, León, Guanajuato, 37150, Mexico
| | - Alvaro Can Chulim
- Universidad Autónoma de Nayarit, Unidad Académica de Agricultura, Carr. Tepic-Compostela km 9.Xalisco, Tepic, Nayarit, 63155, México
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Thilagavathi T, Venugopal D, Marnadu R, Chandrasekaran J, Alshahrani T, Shkir M. An Investigation on Microstructural, Morphological, Optical, Photoluminescence and Photocatalytic Activity of WO3 for Photocatalysis Applications: An Effect of Annealing. J Inorg Organomet Polym Mater 2020. [DOI: 10.1007/s10904-020-01731-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Raza A, Shen H, Haidry AA, Sun L, Liu R, Cui S. Studies of Z-scheme WO3-TiO2/Cu2ZnSnS4 ternary nanocomposite with enhanced CO2 photoreduction under visible light irradiation. J CO2 UTIL 2020. [DOI: 10.1016/j.jcou.2019.12.020] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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13
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Thalgaspitiya WRK, Kapuge TK, He J, Rathnayake D, Kerns P, Suib SL. Mesoporous Molybdenum-Tungsten Mixed Metal Oxide: A Solid Acid Catalyst for Green, Highly Efficient sp 3-sp 2 C-C Coupling Reactions. ACS APPLIED MATERIALS & INTERFACES 2020; 12:5990-5998. [PMID: 31917542 DOI: 10.1021/acsami.9b21633] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A mesoporous molybdenum tungsten mixed metal oxide with high surface area (173 m2/g) was synthesized by using metal dissolution coupled with a surfactant assisted reverse micelle formation synthesis method. Comprehensive characterization of the mixed oxide was performed by using PXRD, Raman, BET, SEM, EDX, TEM, and XPS. Thus, the formation of α-Mo0.5W0.5O3 with a homogeneous distribution of Mo and W throughout the material was seen. Furthermore, multiple oxidation states of molybdenum (Mo6+ and Mo5+) and a single oxidation state of tungsten (W6+) were observed. The weak/moderate acidic sites present in the mixed metal oxide resulted in excellent catalytic properties toward the sp3-sp2 carbon-carbon coupling reactions. The coupling of benzyl alcohol and toluene was completed within 15 min at 110 °C with 99% yield.
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Affiliation(s)
- Wimalika R K Thalgaspitiya
- Department of Chemistry , University of Connecticut , Unit 3060, 55 North Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Tharindu Kankanam Kapuge
- Department of Chemistry , University of Connecticut , Unit 3060, 55 North Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Junkai He
- Institute of Materials Science , University of Connecticut , 97 North Eagleville Road, Unit 3136 , Storrs , Connecticut 06269 , United States
| | - Dinithi Rathnayake
- Department of Chemistry , University of Connecticut , Unit 3060, 55 North Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Peter Kerns
- Department of Chemistry , University of Connecticut , Unit 3060, 55 North Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Steven L Suib
- Institute of Materials Science , University of Connecticut , 97 North Eagleville Road, Unit 3136 , Storrs , Connecticut 06269 , United States
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Humayun M, Ullah H, Cao J, Pi W, Yuan Y, Ali S, Tahir AA, Yue P, Khan A, Zheng Z, Fu Q, Luo W. Experimental and DFT Studies of Au Deposition Over WO 3/g-C 3N 4 Z-Scheme Heterojunction. NANO-MICRO LETTERS 2019; 12:7. [PMID: 34138054 PMCID: PMC7770730 DOI: 10.1007/s40820-019-0345-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 11/25/2019] [Indexed: 05/12/2023]
Abstract
A typical Z-scheme system is composed of two photocatalysts which generate two sets of charge carriers and split water into H2 and O2 at different locations. Scientists are struggling to enhance the efficiencies of these systems by maximizing their light absorption, engineering more stable redox couples, and discovering new O2 and H2 evolutions co-catalysts. In this work, Au decorated WO3/g-C3N4 Z-scheme nanocomposites are fabricated via wet-chemical and photo-deposition methods. The nanocomposites are utilized in photocatalysis for H2 production and 2,4-dichlorophenol (2,4-DCP) degradation. It is investigated that the optimized 4Au/6% WO3/CN nanocomposite is highly efficient for production of 69.9 and 307.3 µmol h-1 g-1 H2 gas, respectively, under visible-light (λ > 420 nm) and UV-visible illumination. Further, the fabricated 4Au/6% WO3/CN nanocomposite is significant (i.e., 100% degradation in 2 h) for 2,4-DCP degradation under visible light and highly stable in photocatalysis. A significant 4.17% quantum efficiency is recorded for H2 production at wavelength 420 nm. This enhanced performance is attributed to the improved charge separation and the surface plasmon resonance effect of Au nanoparticles. Solid-state density functional theory simulations are performed to countercheck and validate our experimental data. Positive surface formation energy, high charge transfer, and strong non-bonding interaction via electrostatic forces confirm the stability of 4Au/6% WO3/CN interface.
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Affiliation(s)
- Muhammad Humayun
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
- China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Habib Ullah
- Environment and Sustainability Institute (ESI), University of Exeter, Penryn Campus, Penryn, Cornwall, TR10 9FE, UK
| | - Junhao Cao
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Wenbo Pi
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Yang Yuan
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Sher Ali
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Asif Ali Tahir
- Environment and Sustainability Institute (ESI), University of Exeter, Penryn Campus, Penryn, Cornwall, TR10 9FE, UK
| | - Pang Yue
- College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Abbas Khan
- Department of Chemistry, Abdul Wali Khan University, Mardan, Khyber Pakhtunkhwa, 23200, Pakistan
| | - Zhiping Zheng
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Qiuyun Fu
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Wei Luo
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China.
- China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China.
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15
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Zhang H, Qiao J, Li G, Zhang M, Li S, Wang J, Song Y. Construction of coated Z-scheme Pd-BaZrO 3@WO 3 composite with enhanced sonocatalytic activity for diazinon degradation in aqueous solution. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 663:97-109. [PMID: 30710788 DOI: 10.1016/j.scitotenv.2019.01.196] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 12/22/2018] [Accepted: 01/15/2019] [Indexed: 06/09/2023]
Abstract
The coated Z-scheme Pd-BaZrO3@WO3 composite as a new-type sonocatalyst with highly sonocatalytic performance is first constructed through sol-gel and hydro-thermal synthesis methods. The chemical configuration, structure and component are characterized by a series of characterization methods. The sonocatalytic degradation of diazinon as a model pollutant is studied to estimate the sonocatalytic performance of coated Z-scheme Pd-BaZrO3@WO3 composite. Some affecting factors such as Pd-BaZrO3 and WO3 mass proportions, ultrasonic (US) irradiation time, reusability and catalyst dosage are researched in detail through UV-vis spectra and gas chromatography (GC). The produced intermediates are detected in the degradation process of diazinon by using gas chromatography-mass spectrometer (GC-MS). The possible reaction mechanism of coated Z-scheme Pd-BaZrO3@WO3 sonocatalyst in sonocatalytic degradation process is also explored. Subsequently, the hydroxyl radicals (OH) and holes (h+) are discriminated to further elaborate the possible sonocatalytic mechanism. The experimental results manifest that the coated Z-scheme Pd-BaZrO3@WO3 sonocatalyst displays a preeminent sonocatalytic performance under ultrasonic irradiation because it can efficaciously suppress recombination of electrons (e-) and holes (h+), extend light response scope and provide almost 100% oxidization surface. In addition, the introduced palladium (Pd) nanorods connecting BaZrO3 and WO3 can expedite e- transfer. Under optimal conditions, the most of diazinon molecules can be disintegrated in the existence of the coated Z-scheme Pd-BaZrO3@WO3 under ultrasonic irradiation for 150 min. This study provides a feasible method for the treatment of environmental pollutions.
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Affiliation(s)
- Hongbo Zhang
- College of Chemistry, Liaoning University, Shenyang 110036, PR China
| | - Jing Qiao
- College of Chemistry, Liaoning University, Shenyang 110036, PR China
| | - Guanshu Li
- College of Environment, Liaoning University, Shenyang 110036, PR China
| | - Meng Zhang
- College of Chemistry, Liaoning University, Shenyang 110036, PR China
| | - Siyi Li
- College of Chemistry, Liaoning University, Shenyang 110036, PR China
| | - Jun Wang
- College of Chemistry, Liaoning University, Shenyang 110036, PR China.
| | - Youtao Song
- College of Environment, Liaoning University, Shenyang 110036, PR China.
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16
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Haiduk Y, Khort A, Lapchuk N, Savitsky A. Study of WO3–In2O3 nanocomposites for highly sensitive CO and NO2 gas sensors. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.02.023] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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17
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Senthil RA, Osman S, Pan J, Sun M, Khan A, Yang V, Sun Y. A facile single-pot synthesis of WO3/AgCl composite with enhanced photocatalytic and photoelectrochemical performance under visible-light irradiation. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.01.056] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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18
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Khan R, Riaz A, Rabeel M, Javed S, Jan R, Akram MA. TiO2@NbSe2 decorated nanocomposites for efficient visible-light photocatalysis. APPLIED NANOSCIENCE 2019. [DOI: 10.1007/s13204-019-01020-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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19
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Kavinkumar V, Jaihindh DP, Verma A, Jothivenkatachalam K, Fu YP. Influence of cobalt substitution on the crystal structure, band edges and photocatalytic properties of hierarchical Bi2WO6 microspheres. NEW J CHEM 2019. [DOI: 10.1039/c9nj00170k] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
An efficient Bi2WO6 catalyst with Co2+ substitution was synthesized via a facile hydrothermal route.
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Affiliation(s)
| | | | - Atul Verma
- Department of Materials Science and Engineering
- National Dong Hwa University
- Hualien 97401
- Taiwan
| | | | - Yen-Pei Fu
- Department of Materials Science and Engineering
- National Dong Hwa University
- Hualien 97401
- Taiwan
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20
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Kavinkumar V, Verma A, Masilamani S, Kumar S, Jothivenkatachalam K, Fu YP. Investigation of the structural, optical and crystallographic properties of Bi2WO6/Ag plasmonic hybrids and their photocatalytic and electron transfer characteristics. Dalton Trans 2019; 48:10235-10250. [DOI: 10.1039/c9dt01807g] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have fabricated an efficient Bi2WO6-Ag plasmonic hybrid via the photoreduction technique and the obtained materials were well characterized with sophisticated instruments.
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Affiliation(s)
| | - Atul Verma
- Department of Materials Science and Engineering
- National Dong Hwa University
- Shou-Feng
- Taiwan
| | | | - Sanath Kumar
- Department of Materials Science and Engineering
- National Dong Hwa University
- Shou-Feng
- Taiwan
| | | | - Yen-Pei Fu
- Department of Materials Science and Engineering
- National Dong Hwa University
- Shou-Feng
- Taiwan
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21
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Kim J, Do JY, Park NK, Hong JP, Kang M. Adsorption/desorption behavior of carbonyl sulfide gas on Scheelite type MWO4 adsorbent. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2018.06.040] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Rajeswari P, Dhanuskodi S, Jothi Venkatachalam K. Impact of microwave-assisted synthesis on the morphology and rhodamine B oxidation properties of ZnO nanocomposites. APPLIED NANOSCIENCE 2018. [DOI: 10.1007/s13204-018-0769-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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23
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Dhanabal R, Velmathi S, Bose AC. Fabrication of RuO 2-Ag 3PO 4 heterostructure nanocomposites: Investigations of band alignment on the enhanced visible light photocatalytic activity. JOURNAL OF HAZARDOUS MATERIALS 2018; 344:865-874. [PMID: 29190584 DOI: 10.1016/j.jhazmat.2017.11.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 11/09/2017] [Accepted: 11/17/2017] [Indexed: 06/07/2023]
Abstract
The RuO2-Ag3PO4 heterostructured nanocomposite was successfully synthesized by facile in situ deposition of porous ruthenium oxide (RuO2) nanoparticles on the surface of the silver phosphate (Ag3PO4). Under visible light irradiation, the 0.5wt.% RuO2-Ag3PO4 heterostructure photocatalyst exhibits enhanced photocatalytic efficiency compared to other composites of RuO2-Ag3PO4 and Ag3PO4. The optimized 0.5wt.% RuO2-Ag3PO4 nanocomposites exhibited 1.5 times enhanced photocatalytic activity towards the degradation of methylene blue (MB) than Ag3PO4. Moreover, the degradation rate of 0.5wt.% RuO2-Ag3PO4 nanocomposite towards the cationic dyes MB and rhodamine B (RhB) was nearly 6.6 times and 4.7 times higher than that towards the anionic dye methyl orange (MO). The formed heterojunction electric field of 310mV at the interface between RuO2 and Ag3PO4 heterostructure induces downward band bending of Ag3PO4. Also, this electric field increases the separation efficiency of electrons-holes resulting higher degradation efficiency. The quenching effect of scavengers test confirms that holes are reactive species and the RuO2-Ag3PO4 nanocomposite is highly stable, exhibited 88% of MB degradation after 4 recycles. The RuO2-Ag3PO4 nanocomposites inhibit self oxidation of Ag3PO4 resulting improved efficiency and stability.
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Affiliation(s)
- Rengasamy Dhanabal
- Nanomaterials Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli, 620 015, India
| | - Sivan Velmathi
- Organic and Polymer Synthesis Laboratory, Department of Chemistry, National Institute of Technology, Tiruchirappalli, 620 015, India
| | - Arumugam Chandra Bose
- Nanomaterials Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli, 620 015, India.
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24
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Reddy PAK, Reddy PVL, Kwon E, Kim KH, Akter T, Kalagara S. Recent advances in photocatalytic treatment of pollutants in aqueous media. ENVIRONMENT INTERNATIONAL 2016; 91:94-103. [PMID: 26915711 DOI: 10.1016/j.envint.2016.02.012] [Citation(s) in RCA: 158] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 02/07/2016] [Accepted: 02/07/2016] [Indexed: 05/07/2023]
Abstract
Photocatalysis can be an excellent solution for resolving the world's energy and environmental problems. It has a wide range of applications for the decontamination of diverse hazardous pollutants in aqueous media. Technological progress in this research field has been achieved toward the improvement of the solar sensitivity to enhance the efficiency of pollutant decontamination. As a result, various strategies have been introduced to upgrade photocatalytic performance with the modification of prototypical photocatalyst such as doping, dye sensitization, semiconductor coupling, mesoporous supports, single site, and nano-based catalysts. In this review, a brief survey is presented to describe those strategies based on the evaluation made against various pollutants (such as pharmaceuticals, pesticides, heavy metals, detergents, and dyes) in aqueous media.
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Affiliation(s)
- P Anil Kumar Reddy
- Indian Institute of Chemical Technology, Tarnaka, Hyderabad, Telangana 500076, India
| | - P Venkata Laxma Reddy
- Program in Environmental Science and Engineering, University of Texas El Paso, El Paso, TX 799038, USA
| | - Eilhann Kwon
- Department of Environment and Energy, Sejong University, Seoul 143-747, Republic of Korea
| | - Ki-Hyun Kim
- Department of Civil & Environmental Engineering, Hanyang University, 222, Wangsimni-Ro, Seoul 133-791, Republic of Korea.
| | - Tahmina Akter
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968, USA
| | - Sudhakar Kalagara
- Department of Chemistry, University of Texas at El Paso, El Paso, TX 79968, USA
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25
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26
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Lu Y, Liu G, Zhang J, Feng Z, Li C, Li Z. Fabrication of a monoclinic/hexagonal junction in WO3 and its enhanced photocatalytic degradation of rhodamine B. CHINESE JOURNAL OF CATALYSIS 2016. [DOI: 10.1016/s1872-2067(15)61023-3] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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27
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Aslam M, Qamar MT, Soomro MT, Ismail IMI, Rehan ZA, Ashraf MW, Hameed A. The effect of cerium alteration on the photocatalytic performance of WO3 in sunlight exposure for water decontamination. RSC Adv 2016. [DOI: 10.1039/c5ra22002e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In an effort to enhance the photocatalytic activity of cubic WO3 in sunlight exposure, its surface was modified by impregnating the Ce3+ ions ranging from 1% to 25% with a step of 5% with respect to the weight of WO3.
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Affiliation(s)
- M. Aslam
- Centre of Excellence in Environmental Studies (CEES)
- King Abdulaziz University
- Jeddah 21589
- Kingdom of Saudi Arabia
| | - M. Tariq Qamar
- Centre of Excellence in Environmental Studies (CEES)
- King Abdulaziz University
- Jeddah 21589
- Kingdom of Saudi Arabia
- Chemistry Department
| | - M. Tahir Soomro
- Centre of Excellence in Environmental Studies (CEES)
- King Abdulaziz University
- Jeddah 21589
- Kingdom of Saudi Arabia
| | - Iqbal M. I. Ismail
- Centre of Excellence in Environmental Studies (CEES)
- King Abdulaziz University
- Jeddah 21589
- Kingdom of Saudi Arabia
- Chemistry Department
| | - Zulfiqar Ahmad Rehan
- Chemistry Department
- Faculty of Science
- King Abdulaziz University
- Jeddah 21589
- Kingdom of Saudi Arabia
| | - M. Waqar Ashraf
- Department of Mathematics & Natural Sciences
- Prince Mohammad Bin Fahd University
- Al Khobar 31952
- Saudi Arabia
| | - A. Hameed
- Centre of Excellence in Environmental Studies (CEES)
- King Abdulaziz University
- Jeddah 21589
- Kingdom of Saudi Arabia
- National Centre for Physics
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28
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Amreetha S, Dhanuskodi S, Nithya A, Jothivenkatachalam K. Three way electron transfer of a C–N–S tri doped two-phase junction of TiO2nanoparticles for efficient visible light photocatalytic dye degradation. RSC Adv 2016. [DOI: 10.1039/c5ra25017j] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
C–N–S tridoped TiO2nanoparticles were synthesized by a sol–gel method using thiourea as a compound source of carbon (C), nitrogen (N) and sulphur (S).
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Affiliation(s)
- S. Amreetha
- Nonlinear Optical Materials Laboratory
- School of Physics
- Bharathidasan University
- Tiruchirappalli 620 024
- India
| | - S. Dhanuskodi
- Nonlinear Optical Materials Laboratory
- School of Physics
- Bharathidasan University
- Tiruchirappalli 620 024
- India
| | - A. Nithya
- Department of Chemistry
- Anna University
- BIT Campus
- Tiruchirappalli 620 024
- India
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29
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Chandra Mohan S, Bhattacharjee D, Chandra Deka R, Jothivenkatachalam K. Combined experimental and theoretical investigations on the encapsulation of nickel(ii)tet-a complex in zeolite Y and its photocatalytic activity. RSC Adv 2016. [DOI: 10.1039/c6ra15179e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Photocatalytic mechanism of the 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane [tet-a] nickel(ii) encapsulated in zeolite Y.
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30
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Gong H, Ma R, Mao F, Liu K, Cao H, Yan H. Light-induced spatial separation of charges toward different crystal facets of square-like WO3. Chem Commun (Camb) 2016; 52:11979-11982. [DOI: 10.1039/c6cc06363b] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Light-induced preferential migration of electrons and holes to the minor (200) and (020) facets and the dominant (002) facets of square-like WO3, respectively, resulted in the square-like WO3 nanoplates with Pt loaded mainly on dominant (002) facets shows higher photocatalytic activity than that Pt loaded on the minor facets.
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Affiliation(s)
- Huihua Gong
- College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Ruirui Ma
- College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Fang Mao
- College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Kewei Liu
- College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Hongmei Cao
- College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Hongjian Yan
- College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
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31
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Nithya A, JeevaKumari HL, Rokesh K, Ruckmani K, Jeganathan K, Jothivenkatachalam K. A versatile effect of chitosan-silver nanocomposite for surface plasmonic photocatalytic and antibacterial activity. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 153:412-22. [DOI: 10.1016/j.jphotobiol.2015.10.020] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 10/24/2015] [Accepted: 10/26/2015] [Indexed: 10/22/2022]
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32
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Li G, Varga T, Yan P, Wang Z, Wang C, Chambers SA, Du Y. Crystallographic dependence of photocatalytic activity of WO3thin films prepared by molecular beam epitaxy. Phys Chem Chem Phys 2015; 17:15119-23. [DOI: 10.1039/c5cp01344e] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The (111) surface of WO3is found to have the highest photocatalytic reactivity, followed by (110) and (001).
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Affiliation(s)
- Guoqiang Li
- Fundamental & Computational Sciences Directorate
- Pacific Northwest National Laboratory
- Richland
- USA
- Key Laboratory of Photovoltaic Materials of Henan Province
| | - Tamas Varga
- Environmental Molecular Sciences Laboratory
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Pengfei Yan
- Environmental Molecular Sciences Laboratory
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Zhiguo Wang
- Department of Applied Physics
- University of Electronic Science and Technology of China
- Chengdu
- P. R. China
| | - Chongmin Wang
- Environmental Molecular Sciences Laboratory
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Scott A. Chambers
- Fundamental & Computational Sciences Directorate
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Yingge Du
- Environmental Molecular Sciences Laboratory
- Pacific Northwest National Laboratory
- Richland
- USA
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33
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Mousavi SM, Mahjoub AR, Abazari R. Green synthesis of ZnO hollow sphere nanostructures by a facile route at room temperature with efficient photocatalytic dye degradation properties. RSC Adv 2015. [DOI: 10.1039/c5ra19507a] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The present work has prepared ZnO hollow spherical nanoparticles using a straightforward synthetic route and has innovatively made use of carbon spheres as a template at room temperature.
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Affiliation(s)
| | | | - Reza Abazari
- Department of Chemistry
- Tarbiat Modares University
- Tehran
- Iran
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34
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Rahimnejad S, He JH, Chen W, Wu K, Xu GQ. Tuning the electronic and structural properties of WO3 nanocrystals by varying transition metal tungstate precursors. RSC Adv 2014. [DOI: 10.1039/c4ra10650d] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
WO3 nanoplates derived from NiWO4 were found to have the highest concentration of oxygen vacancy, narrowest band gap, longest electron–hole recombination time, and in turn the highest rate of photodegradation of azo dye methylene blue.
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Affiliation(s)
- Sara Rahimnejad
- Department of Chemistry
- National University of Singapore
- , Singapore
- SPURc
- Singapore 138602, Singapore
| | - Jing Hui He
- Department of Chemistry
- National University of Singapore
- , Singapore
- SPURc
- Singapore 138602, Singapore
| | - Wei Chen
- Department of Chemistry
- National University of Singapore
- , Singapore
- Department of Physics
- National University of Singapore
| | - Kai Wu
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing, P. R. China
- SPURc
| | - Guo Qin Xu
- Department of Chemistry
- National University of Singapore
- , Singapore
- SPURc
- Singapore 138602, Singapore
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