Engineering heterogeneous semiconductors for solar water splitting

Li, Xin; Yu, Jiaguo; Low, Jingxiang; Fang, Yueping; Xiao, Jing; Chen, Xiaobo

doi:10.1039/c4ta04461d

Cited by 1,722 publications

(864 citation statements)

References 661 publications

(403 reference statements)

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“…The reason for this large increase can be associated with the fact that silver is heavier than copper, giving softer modes, and the higher ionicity of BiAgOS, as discussed for the electronic structure description. Effective masses are related to the charge carrier mobilities through equation (6), where µ is the charge carrier mobility, e is the elementary charge, and τ is the collision time. Lower effective masses give better charge delocalization and charge mobility.…”

Section: Dielectric and Conducting Propertiesmentioning

confidence: 99%

Bismuth Silver Oxysulfide for Photoconversion Applications: Structural and Optoelectronic Properties

et al. 2017

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Single-phase bismuth silver oxysulfide, BiAgOS, was prepared by a hydrothermal method. Its structural, morphological and optoelectronic properties were investigated and compared with bismuth copper oxysulfide (BiCuOS). Rietveld refinement of the powder X-ray diffraction (XRD) measurements revealed that the BiAgOS and BiCuOS crystals have the same structure as ZrSiCuAs: the tetragonal space group P4/nmm. X-ray photoelectron spectroscopy (XPS) analyses confirmed that the BiAgOS has a high purity, in contrast with BiCuOS, which tends to have Cu vacancies. The Ag has a monovalent oxidation state, whereas Cu is present in the oxidation states of +1 and +2 in the BiCuOS system. Combined with experimental measurements, density functional theory calculations employing the range-separated hybrid HSE06 exchange-correlation functional with spin-orbit coupling quantitatively elucidated photophysical properties such as absorption coefficients, effective masses and dielectric constants. BiCu-OS and BiAgOS were found to have indirect bandgaps of 1.1 and 1.5 eV, respectively. Both possess high dielectric constants and low electron and hole effective masses. Therefore, these materials are expected to have high exciton dissociation capabilities and excellent carrier diffusion properties. This study reveals that BiAgOS is a promising candidate for photoconversion applications.

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Section: Dielectric and Conducting Propertiesmentioning

confidence: 99%

Bismuth Silver Oxysulfide for Photoconversion Applications: Structural and Optoelectronic Properties

et al. 2017

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“…On the other hand, photoelectrochemical systems for water splitting could be easily achieved using an external electric field, generally exhibiting a relatively high efficiency ( Figure 5). However, these systems are expensive for practical applications [55,59].…”

Section: Artificial Photosynthesismentioning

confidence: 99%

Industrial synthesis and characterization of nanophotocatalysts materials: titania

Ramos-Delgado

Gracia-Pinilla

Mangalaraja

et al. 2016

Nanotechnology Reviews

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Despite the recent synthesis and identification of a diverse set of new nanophotocatalysts that has exploded recently, titanium dioxide (TiO 2 ) remains among the most promising photocatalysts because it is inexpensive, non-corrosive, environmentally friendly, and stable under a wide range of conditions. TiO 2 has shown excellent promise for solar cell applications and for remediation of chemical pollutants and toxins. Over the past few decades, there has been a tremendous development of nanophotocatalysts for a variety of industrial applications (i.e. for water purification and reuse, disinfection of water matrices, air purification, deodorization, sterilization of soils). This paper details traditional and new industrial routes for the preparation of nanophotocatalysts and the characterization techniques used to understand the physical chemical properties of them, like surface area, ζ potential, crystal size, and phase crystallographic, morphology, and optical transparency. Finally we present some applications of the industrial nanophotocatalysts.

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“…Tantalum-based photocatalysts have attracted the researchers' attention due to their unique structure and high performance for photocatalytic reaction, especially in the separation of water under irradiation of UV [1][2]. The photocatalytic performance of the K 2 Ta 2 O 6 with the pyrochlore-like structure was better than the the pervokites-like structure of KTaO 3 with the irradiation of UV, due to the K 2 Ta 2 O 6 has the distorted [TaO6] structure [3].…”

Section: Introductionmentioning

confidence: 99%

Improving photocatalytic activity of K2Ta2O6 by Sulfur anion doping

Cao¹,

Li²,

Zhou³

et al. 2015

Proceedings of the 3rd International Conference on Material, Mechanical and Manufacturing Engineering

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Abstract. The photocatalysts of S-doped K 2 Ta 2 O 6 have been successfully synthesized by hydrothermal method. Effects of S doping to the K 2 Ta 2 O 6 on the structure and photocatalytic performance are systematically investigated. The S was successfully introduced into the lattice sites of Ta 5+ at the state of S 6+ . The morphology was unchanged when the S was incorporated into the K 2 Ta 2 O 6 . The band gap of K 2 Ta 2 O 6 was narrowed with the increase of S dopants. The photocatalytic test under UV-light irradiation indicated that the decomposing efficiency of MO and RhB was elevated with the incorporation of S. And the sample prepared from addition of 10% molar ratio of S precursor showed the highest photocatlytic performance.

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Engineering heterogeneous semiconductors for solar water splitting

Abstract: Recent progress and strategies toward solar water splitting over heterogeneous semiconductors are reviewed and the challenges and future perspectives are suggested.

Cited by 1,722 publications

References 661 publications

Bismuth Silver Oxysulfide for Photoconversion Applications: Structural and Optoelectronic Properties

Bismuth Silver Oxysulfide for Photoconversion Applications: Structural and Optoelectronic Properties

Industrial synthesis and characterization of nanophotocatalysts materials: titania

Improving photocatalytic activity of K2Ta2O6 by Sulfur anion doping

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