Journal ArticleDOI
Photocatalytic hydrogen evolution on P-type tetragonal zircon BiVO4
Junpeng Wang,Junpeng Wang,Yanan Song,Jing Hu,Yu Li,Zeyan Wang,Ping Yang,Wang Gang,Qian Ma,Quande Che,Ying Dai,Baibiao Huang +11 more
TLDR
In this paper, a tetragonal zircon BiVO4 (P-BiVO4) was grown on fluorine-doped tin oxide (FTO) glass via hydrothermal method.Abstract:
Tetragonal zircon BiVO4 (P-BiVO4) were grown on fluorine-doped tin oxide (FTO) glass via hydrothermal method. The cathodic photocurrent and Mott-Schottky analysis indicate that the tetragonal zircon BiVO4 is a p-type semiconductor. Inductively coupled plasma (ICP) analysis and X-ray photoelectron spectrum showed that there are Bi vacancies and interstitial oxygen exist in the crystal, which are the origin of the p-type conductivity. The flat band potential of the P-BiVO4 is about 1.33 V (vs Ag/AgCl) inferred from Mott-Schottky plots. Combining with diffuse reflection spectrum and valence band X-ray photoelectron spectrum, the calculated conduction band value of the P-BiVO4 is about 0.06 V vs RHE, slightly higher than the reduction potential of hydrogen. However, the P-BiVO4 exhibit hydrogen production activity under Xe light irradiation even though its conduction band level is not negative enough. This can be attributed to the hot carrier processes in p-type semiconductors.read more
Citations
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Bi2WO6-x nanosheets with tunable Bi quantum dots and oxygen vacancies for photocatalytic selective oxidation of alcohols
TL;DR: In this paper, a facile hydrothermal treatment combining in-situ redox reaction route was used to synthesize Bi2WO6-x nanosheets with tunable Bi quantum dots and oxygen vacancies for selective oxidation of aromatic alcohols to carbonyl compounds in aqueous medium under visible-light irradiation.
Journal ArticleDOI
Synthesis and application of Fe3O4/FeWO4 composite as an efficient and magnetically recoverable visible light-driven photocatalyst for the reduction of Cr(VI)
TL;DR: In this paper, the photocatalytic improvement mechanism of 20% Fe3O4/FeWO4 was proposed to improve the efficiency of aqueous Cr(VI) under visible light (λ < 420 nm) irradiation.
Journal ArticleDOI
Experimental and DFT Insights on Microflower g-C3N4/BiVO4 Photocatalyst for Enhanced Photoelectrochemical Hydrogen Generation from Lake Water
Mohamad Fakhrul Ridhwan Samsudin,Habib Ullah,Robabeh Bashiri,Norani Muti Mohamed,Suriati Sufian,Yun Hau Ng +5 more
TL;DR: In this paper, an experimental and density functional theory analysis of the composite g-C3N4/BiVO4 microflower photocatalysts is comprehensively discussed, and a remarkable photoelectrocatalytic solar...
Journal ArticleDOI
Tailoring the Morphological Structure of BiVO4 photocatalyst for Enhanced Photoelectrochemical Solar Hydrogen Production from Natural Lake water
Mohamad Fakhrul Ridhwan Samsudin,Robabeh Bashiri,Norani Muti Mohamed,Yun Hau Ng,Suriati Sufian +4 more
TL;DR: In this article, a monoclinic bismuth vanadate (BiVO4) photocatalyst was used in a tandem photoelectrochemical cell (PEC) to produce hydrogen from abundant natural lake water.
Journal ArticleDOI
Enhanced photocatalytic degradation performance of BiVO4/BiOBr through combining Fermi level alteration and oxygen defect engineering
Chun Liu,Shuai Mao,Ming-da Shi,Xianyong Hong,Dongting Wang,Fengyun Wang,Mingzhu Xia,Qun Chen +7 more
TL;DR: In this article , a novel BiVO 4 /BiOBr-Ov Z-scheme heterojunction has been prepared, where the existence of oxygen vacancies leads to altering the photogenerated carrier transfer path from type-II to Z-Scheme.
References
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Journal ArticleDOI
Efficient photochemical water splitting by a chemically modified n-TiO2.
TL;DR: A chemically modified n-type TiO2 is synthesized by controlled combustion of Ti metal in a natural gas flame and performs water splitting with a total conversion efficiency of 11% and a maximum photoconversion efficiency of 8.35% when illuminated at 40 milliwatts per square centimeter.
Journal ArticleDOI
Nanoporous BiVO4 Photoanodes with Dual-Layer Oxygen Evolution Catalysts for Solar Water Splitting
Tae Woo Kim,Kyoung-Shin Choi +1 more
TL;DR: It is demonstrated that a nanoporous morphology effectively suppresses bulk carrier recombination without additional doping, manifesting an electron-hole separation yield of 0.90 at 1.23 volts (V) versus the reversible hydrogen electrode (RHE).
Journal ArticleDOI
Self-Supported Nanoporous Cobalt Phosphide Nanowire Arrays: An Efficient 3D Hydrogen-Evolving Cathode over the Wide Range of pH 0–14
TL;DR: The topotactic fabrication of self-supported nanoporous cobalt phosphide nanowire arrays on carbon cloth via low-temperature phosphidation of the corresponding Co(OH)F/CC precursor offers excellent catalytic performance and durability under neutral and basic conditions.
Journal ArticleDOI
P-type electrical conduction in transparent thin films of CuAlO2
TL;DR: In this paper, the authors describe a strategy for identifying oxide materials that should combine p-type conductivity with good optical transparency, and illustrate the potential of this approach by reporting the properties of thin films of CuAlO2, a transparent oxide having room-temperature p- type conductivity up to 1'S'cm−1.
Journal ArticleDOI
A Novel Aqueous Process for Preparation of Crystal Form-Controlled and Highly Crystalline BiVO4 Powder from Layered Vanadates at Room Temperature and Its Photocatalytic and Photophysical Properties
TL;DR: In this paper, highly crystalline monoclinic and tetragonal BiVO4 photocatalysts were obtained by the reaction of layered potassium vanadate powder (KV3O8 and K3V5O14) with Bi(NO3)3 for 3 days in aqueous media at room temperature.
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