Engineering BiVO4@Bi2S3 heterojunction by cosharing bismuth atoms toward boosted photocatalytic Cr(VI) reduction

Lian, Xinyi; Zhang, Ji‐Guang; Zhan, Yue; Zhang, Yanping; Yang, S. L.; Chen, Zhou; Dong, Yuanyuan; Fang, Weiping; Yi, Xiaodong

doi:10.1016/j.jhazmat.2020.124705

Cited by 75 publications

(15 citation statements)

References 69 publications

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“…38 16,42 In addition, the signal of Bi 2 S 3 is also not discovered in Figure S1b, due to the too low reaction temperature to form the Bi 2 S 3 /BiVO 4 heterojunction by TAA. 43,44 With the introduction of CQDs, the fringe of CdIn 2 S 4 nanosheets turns fuzzy for the uniform distribution of CQDs in Figure 1d,g.…”

Section: Computational Detailsmentioning

confidence: 99%

Type-II Heterojunction CdIn₂S₄/BiVO₄ Coupling with CQDs to Improve PEC Water Splitting Performance Synergistically

Wang

Zhou

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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Bismuth vanadate (BiVO 4 ) has been considered as a promising photoelectrocatalytic (PEC) semiconductor, but suffers from severe hole recombination, attributed to the short hole-diffusion length and the low carrier mobility. Herein, a type-II heterojunction CdIn 2 S 4 /BiVO 4 is designed to improve the photocurrent density from 1.22 (pristine BiVO 4 ) to 2.68 mA cm −2 at 1.23 V vs the reversible hydrogen electrode (RHE), accelerating the bulk separation of photogenerated carriers by the built-in field from the matched energy band. With the introduction of CQDs, CQDs/CdIn 2 S 4 /BiVO 4 increases the photocurrent density to 4.84 mA cm −2 , enhancing the light absorption and cathodically shifting its onset potential, due to the synergetic effect of the heterojunction and CQDs. Compared with BiVO 4 , CQDs/CdIn 2 S 4 /BiVO 4 promotes the bulk separation efficiency to 94.6% and the surface injection efficiency to 72.2%. Additionally, spin-coating of FeOOH on CQDs/CdIn 2 S 4 /BiVO 4 could further improve the PEC performance and keep a long stability for water splitting. The density function theory (DFT) calculations illustrated that the type-II heterojunction CdIn 2 S 4 /BiVO 4 could decrease the oxygen evolution reaction (OER) overpotential and accelerate bulk charge separation for the built-in field of the aligned band structure. KEYWORDS: bismuth vanadate (BiVO 4 ), type-II heterojunction, cadmium indium sulfide (CdIn 2 S 4 ), carbon quantum dots (CQDs), density function theory (DFT)

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Section: Computational Detailsmentioning

confidence: 99%

Type-II Heterojunction CdIn₂S₄/BiVO₄ Coupling with CQDs to Improve PEC Water Splitting Performance Synergistically

Wang

Zhou

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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“…maximizing their photocatalytic efficiency, which has been confirmed by our previous study. [11] Therefore, it is urgently needed to design and synthesize hybrid semiconductor with proper energy level alignment and lower resistance of charge transfer across the interface, which will enhance the photocatalytic activity.…”

Section: Doi: 101002/ente202200362mentioning

confidence: 99%

“…The photogenerated electrons and holes pass the interface between these heteroid semiconductor would suffer a high carrier transport activation energy and prevent them from maximizing their photocatalytic efficiency, which has been confirmed by our previous study. [ 11 ] Therefore, it is urgently needed to design and synthesize hybrid semiconductor with proper energy level alignment and lower resistance of charge transfer across the interface, which will enhance the photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Oxidative Coupling of Benzylamine to Schiff Base over 0D/2D CdS/CdIn₂S₄ Heterojunction

Huang

et al. 2022

Energy Tech

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Photocatalytic organic synthesis as a green pathway has become a promising extended branch of organic chemistry and received significant attention owing to its mild operational conditions and eco-friendly features. [1] Imine and its derivatives are vital intermediates to construct N-containing heterocyclic compounds for the fine chemical industry and pharmaceutical industry. Currently, it is an energy-consuming and environmentally harmful process in the industrial production of imines, where the condensation of amines with aldehydes to form imines are usually required organic solvents and elevated temperatures, which greatly limits their large-scale applications. [2] Alternatively, the efficient photocatalysis oxidation of amine to imine is a sustainable approach. However, the photocatalytic efficiency and synthesis yield related to the band structures of semiconductor materials are not satisfied the high requirements of potential industrialization. Thence, it is urgent to develop a more suitable semiconductor structure to enhance the utilization efficiency of photoinduced charge carriers and thus the photocatalytic oxidation performance of amine to imine.Recently, substantial efforts have been devoted to improving photocatalytic oxidation efficiency. A series of semiconductor materials have been widely developed in the photoinduced organic transformation of amine to imine, including bismuth oxyhalides, [3] bismuth molybdate, [4] tungsten sulfide, [5] graphitic carbon nitride, [6] TiO 2 , [7] metal-organic frameworks [8] and ZnIn 2 S 4 . [9] However, one of the challenges faced by photocatalytic imine synthesis is how to improve the imine yield and transformation rate. Constructing heterojunction semiconductor structure are deemed as one of the most effective strategies to boost the visible light absorption ability, photogenerated electron-hole pairs separation rate, and redox ability. For instance, Zhang and colleagues demonstrated that the photocatalytic coupling of amines and alcohols under visible light conditions was improved by employing the CdS quantum dots (QDs) decorated MIL-101 photocatalyst. The optimized CdS@MIL-101 exhibited 57% conversion of benzylamine with more than 99% selectivity of imine within 1 h. As proposed by Li et al., an all-solid-state Z-scheme photocatalyst of WO 3 •H 2 O/Pd/CdS ternary heterostructures was designed to extend light harvesting region, faster spatial separation of electron and holes, and elevate redox power. [10] As results, the WO 3 •H 2 O/Pd/CdS ternary heterostructures showed 7.3-fold and 1.7-fold increase in the percent conversion of the oxidative coupling of benzylamines to imines as compared to pristine WO 3 •H 2 O nanosheets and bare CdS nanoparticles, respectively. However, we notice that these two heterogeneous semiconductors face a strong coulomb electrostatic repulsive force at their interface. The photogenerated electrons and holes pass the interface between these heteroid semiconductor would suffer a high carrier transport activation energy and prevent the...

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“…The first category is semiconductors whose band gap is higher than or approximately equal to the band gap of BiVO 4 , such as Bi 4 Ti 3 O 12 11 and g-C 3 N 4 . 12 The second category is semiconductors whose band gap is lower than that of BiVO 4 , such as In 2 S 3 , 13 Cu 2 O, 14 Bi 2 S 3 , 15 CuInS 2 , 16 and Ag 3 PO 4 . 17 Although the separation degree of photogenerated electrons and photogenerated holes can be improved after BiVO 4 is compounded with the first category of semiconductor material, the UV-vis absorption spectrum of the composite material usually shifts to the short wavelength direction or almost does not move toward the long wavelength direction, which is not conducive to the utilization of the visible region in sunlight.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of BiVO₄ and BiVO₄/Ag₂O regarding their properties and photocatalytic degradation mechanism

et al. 2022

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Engineering BiVO4@Bi2S3 heterojunction by cosharing bismuth atoms toward boosted photocatalytic Cr(VI) reduction

Cited by 75 publications

References 69 publications

Type-II Heterojunction CdIn₂S₄/BiVO₄ Coupling with CQDs to Improve PEC Water Splitting Performance Synergistically

Type-II Heterojunction CdIn₂S₄/BiVO₄ Coupling with CQDs to Improve PEC Water Splitting Performance Synergistically

Photocatalytic Oxidative Coupling of Benzylamine to Schiff Base over 0D/2D CdS/CdIn₂S₄ Heterojunction

Comparative study of BiVO₄ and BiVO₄/Ag₂O regarding their properties and photocatalytic degradation mechanism

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Engineering BiVO4@Bi2S3 heterojunction by cosharing bismuth atoms toward boosted photocatalytic Cr(VI) reduction

Cited by 75 publications

References 69 publications

Type-II Heterojunction CdIn2S4/BiVO4 Coupling with CQDs to Improve PEC Water Splitting Performance Synergistically

Type-II Heterojunction CdIn2S4/BiVO4 Coupling with CQDs to Improve PEC Water Splitting Performance Synergistically

Photocatalytic Oxidative Coupling of Benzylamine to Schiff Base over 0D/2D CdS/CdIn2S4 Heterojunction

Comparative study of BiVO4 and BiVO4/Ag2O regarding their properties and photocatalytic degradation mechanism

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Type-II Heterojunction CdIn₂S₄/BiVO₄ Coupling with CQDs to Improve PEC Water Splitting Performance Synergistically

Type-II Heterojunction CdIn₂S₄/BiVO₄ Coupling with CQDs to Improve PEC Water Splitting Performance Synergistically

Photocatalytic Oxidative Coupling of Benzylamine to Schiff Base over 0D/2D CdS/CdIn₂S₄ Heterojunction

Comparative study of BiVO₄ and BiVO₄/Ag₂O regarding their properties and photocatalytic degradation mechanism