The novel Z-scheme heterojunction photocatalyst WO/CeO was prepared by hydrothermal synthesis. The photocatalytic properties of WO/CeO were evaluated by photocatalytic hydrogen evolution under visible light. The result shows that the 15 wt% WO/CeO composite has the best hydrogen production efficiency of about 0.2061 mmol gh, which was 1.93 times higher than that the obtained pure CeO. The characterization results demonstrated that the existence of Z-scheme heterojunction structure at the contact interface of WO and CeO was the origin of the enhanced photocatalytic performance for hydrogen evolution, which could greatly increase the accumulation of photo-generated electrons and the separation efficiency of charge carrier. In accordance with density functional theory (DFT) calculation, we further confirmed the formation of Z-scheme heterojunction structures. This work is anticipated to expand the ideas for modifying CeO semiconductor materials to improve the rate of photocatalytic hydrogen production.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jcis.2020.06.075 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Morphology control and enhanced activity of (Cu-S)MOF@ZnS heterostructures for photocatalytic H production.
J Colloid Interface Sci
December 2024
Department of Chemistry, Fu Jen Catholic University, New Taipei City 24205, Taiwan.
A novel metal-organic framework (MOF), (Cu-S)MOF, with a copper-sulfur planar structure was applied to photocatalytic H production application. (Cu-S)MOF@ZnS nanocomposite was synthesized using a microwave-assisted hydrothermal approach. The formation of (Cu-S)MOF and wurtzite ZnS in the composite nanoparticles was analyzed by X-ray diffraction (XRD), field emission-scanning electron microscopy (FESEM), and high-resolution transmission electron microscope (HRTEM).
View Article and Find Full Text PDFCarbon, hydrogen, nitrogen and chlorine isotope fractionation during 3-chloroaniline transformation in aqueous environments by direct photolysis, TiO photocatalysis and hydrolysis.
Water Res
December 2024
School of Water Resources and Environment and Research Center of Environmental Science and Engineering, Sino-Hungarian Joint Laboratory of Environmental Science and Health, China University of Geosciences (Beijing), 29 Xueyuan Road, Haidian District, 100083 Beijing, China; Department of Technical Biogeochemistry, Helmholtz Centre for Environmental Research-UFZ, Permoserstraße 15 04318 Leipzig, Germany; Isodetect GmbH, Deutscher Platz 5b, 04103 Leipzig, Germany. Electronic address:
This study investigates carbon, hydrogen, nitrogen and chlorine isotope fractionation during the transformation of 3-chloroaniline (3-CA) via direct photolysis, TiO photocatalytic degradation at neutral condition and hydrolysis at pH 3, pH 7 and pH 11. Direct photolysis and ∙OH reaction (UV/HO) showed similar inverse isotope fractionation (ε) for carbon (1.9 ± 0.
View Article and Find Full Text PDFPhotocatalytic Oxidative Coupling of Methane to Ethane Using CO2 as a Soft Oxidant Over the Au/TiO2-Vo Nanosheets.
Angew Chem Int Ed Engl
December 2024
University of Science and Technology of China, Hefei National Research Center for Physical Sciences at Microscale, jinzhai road, hefei, CHINA.
Herein, we first report a photocatalytic OCM using CO2 as a soft oxidant for C2H6 production under mild conditions, where an efficient photocatalyst with unique interface sites is constructed to facilitate CO2 adsorption and activation, while concurrently boosting CH4 dissociation. As a prototype, the Au quantum dots anchored on oxygen-deficient TiO2 nanosheets are fabricated, where the Au-Vo-Ti interface sites for CO2 adsorption and activation are collectively disclosed by in situ Kelvin probe force microscopy, quasi in situ X-ray photoelectron spectroscopy and theoretical calculations. Compared with single metal site, the Au-Vo-Ti interface sites exhibit the lower CO2 adsorption energy and decrease the energy barrier of the *CO2 hydrogenation step from 1.
View Article and Find Full Text PDFBimetallic Mesoporous MCM-41 Nanoparticles with Ta/(Ti, V, Co, Nb) with Catalytic and Photocatalytic Properties.
Nanomaterials (Basel)
December 2024
Institute of Physical Chemistry-Ilie Murgulescu of the Romanian Academy, 202 Splaiul Independentei, 060021 Bucharest, Romania.
Bimetallic (Ta/Ti, V, Co, Nb) mesoporous MCM-41 nanoparticles were obtained by direct synthesis and hydrothermal treatment. The obtained mesoporous materials were characterized by XRD, XRF, N adsorption/desorption, SEM, TEM, XPS, Raman, UV-Vis, and PL spectroscopy. A more significant effect was observed on the mesoporous structure, typically for MCM-41, and on optic properties if the second metal (Ti, Co) did not belong to the same Vb group with Ta as V and Nb.
View Article and Find Full Text PDFLaser Synthesis and Photocatalytic Properties of Bismuth Oxyhalides Nanoparticles.
Nanomaterials (Basel)
December 2024
Laboratory of Advanced Materials and Technology, Tomsk State University, Tomsk 634050, Russia.
Photocatalysis offers a powerful approach for water purification from toxic organics, hydrogen production, biosolids processing, and the conversion of CO into useful products. Further advancements in photocatalytic technologies depend on the development of novel, highly efficient catalysts and optimized synthesis methods. This study aimed to develop a laser synthesis technique for bismuth oxyhalide nanoparticles (NPs) as efficient and multifunctional photocatalysts.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!