Construction of S-scheme Bi2WO6/g-C3N4 heterostructure nanosheets with enhanced visible-light photocatalytic degradation for ammonium dinitramide

Lian, Xiaoyan; Xue, Weilan; Dong, Shuai; Liu, Enzhou; Li, Hui; Xu, Kangzhen

doi:10.1016/j.jhazmat.2021.125217

Cited by 166 publications

(28 citation statements)

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“…S‐scheme photocatalysts demonstrate efficient performances for reactive oxygen species (ROS) evolution in pollutant decomposition and sterilization processes, e.g., CoFe 2 O 4 /g‐C 3 N 4 , 0D/2D CeO 2 /g‐C 3 N 4 , S‐pCN/WO 2.72 , Sb 2 WO 6 /g‐C 3 N 4 , OVs‐Bi 2 O 3 /Bi 2 SiO 5 , In 2 O 3– x (OH) y /Bi 2 MoO 6 , and BP/BiOBr, Bi 2 MoO 6 /CdS, BiOCl/CuBi 2 O 4 , Bi 2 WO 6 /g‐C 3 N 4 , SnNb 2 O 6 /Ag 3 VO 4 , BiOBr/BiOAC 1–– x Br x , BiOI/Bi 2 WO 6 , Bi 2 O 3 /TiO 2 , In 2 S 3 /Bi 2 O 2 CO 3 , ZnO–V 2 O 5 –WO 3 , S‐doped g‐C 3 N 4 /TiO 2 , BiVO 4 /Ag 3 VO 4 , CdS/UiO‐66, α‐Fe 2 O 3 /Bi 2 WO 6 , Cd 0.5 Zn 0.5 S/g‐C 3 N 4 , Sb 2 WO 6 /BiOBr, and Bi 2 MoO 6 /g‐C 3 N 4 /Au. [ 28,76–97 ] Li et al utilized thin black phosphorus (BP) to couple BiOBr nanosheets to construct S‐scheme BP/BiOBr nanoheterojunction for H 2 O 2 evolution, [ 80 ] as shown in Figure a. H 2 O 2 evolution rate over 10BP/BiOBr is 2.6 times than that over BiOBr.…”

Section: S‐scheme Photocatalystsmentioning

confidence: 99%

“…[ 83 ] In Figure a,b, ammonium dinitramide was photocatalytically decomposed over S‐scheme Bi 2 WO 6 /g‐C 3 N 4 with efficient evolution of ·O 2 − and ·OH; removal rate of ammonium dinitramide over the Bi 2 WO 6 /g‐C 3 N 4 achieved 98.93% within 80 min under visible light illumination. [ 84 ] Moreover, powerful active oxygen species production efficiency can be used for high efficiency sterilization. Yu et al designed a 0D/2D S‐scheme system including CeO 2 quantum dots and g‐C 3 N 4 (CeO 2 /PCN) by in‐situ wet chemistry along with heating.…”

Section: S‐scheme Photocatalystsmentioning

confidence: 99%

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S‐Scheme Photocatalytic Systems

et al. 2021

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Recently, step‐scheme (S‐scheme) photocatalysts have received widespread attention in the field of solar fuel development and transformation because of efficient charge spatial separation along with strong redox capabilities. Herein, the development history of S‐scheme photocatalysts is summarized and reviewed, from Z‐scheme photocatalysts to S‐scheme photocatalysts. Advantages of S‐scheme photocatalysts are also discussed in depth and detail, including design principles and construction strategies as well as charge transfer mechanisms. In addition, identification characterizations for S‐scheme photocatalysts and their solar energy conversion applications are also reviewed. Finally, conclusions and outlooks for solar energy conversion challenges are demonstrated. It provides insights and up‐to‐date information to enable the scientific community to fully tap into the potential of S‐scheme photocatalysts in renewable energy generation and environmental remediation.

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Section: S‐scheme Photocatalystsmentioning

confidence: 99%

Section: S‐scheme Photocatalystsmentioning

confidence: 99%

S‐Scheme Photocatalytic Systems

et al. 2021

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In situ Irradiated XPS Investigation on S‐Scheme TiO₂@ZnIn₂S₄ Photocatalyst for Efficient Photocatalytic CO₂ Reduction

Wang

Cheng

Zhang

et al. 2021

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Recently, a novel step-scheme (S-scheme) heterojunction was proposed and has attracted researchers' attention. [23][24][25][26][27][28][29][30][31][32][33][34][35][36] Usually, S-scheme heterojunction consists of reduction photocatalyst (RP) and oxidation photocatalyst (OP). Besides, the directional migration of free electrons will lead to band bending and internal electric field (IEF) at their interface owing to the work function difference. Notably, under the influence of IEF, the photogenerated electrons of OP with weak reduction ability can recombine with the photogenerated holes of RP with weak oxidation ability; while those with strong redox abilities are preserved. Therefore, reasonable construction of TiO 2 -based S-scheme heterojunction is of great significance to improve photocatalytic reaction performance. Apart from the charge carrier separation, the morphology of photocatalysts is another important factor to influence the photocatalytic performance. [15,17,19,37,38] Photocatalysts with hollow structures have attracted great attention owing to manifold advantages including larger specific surface area, abundant active sites, shortened diffusion distance as well as improved light reflection and scattering. [37,[39][40][41][42][43][44] Therefore, the design of hollow S-scheme heterojunction photocatalyst is of vital importance to enhance photocatalytic performance.ZnIn 2 S 4 , as a typical reduction photocatalyst, stands out for its layered structure, narrow bandgap, suitable redox potentials, and good chemical stability. And it has been used for various photocatalytic applications including hydrogen production, CO 2 reduction, and organic degradation. [45][46][47][48][49][50][51] Unfortunately, pristine ZnIn 2 S 4 photocatalyst shows low photocatalytic efficiency owing to the fast recombination of photogenerated charge carriers. [45][46][47][48][49] Considering the suitable match of band gap of ZnIn 2 S 4 and TiO 2 for S-scheme heterojunction, [27,52] we construct the hollow TiO 2 @ZnIn 2 S 4 core-shell structure. Up to now, to the best of our knowledge, it has never been reported.Herein, we grow ZnIn 2 S 4 nanosheets on the outer surface of TiO 2 hollow spheres by in situ chemical bath deposition reaction. This rational design is not only able to provide large specific surface areas and abundant reaction sites for PCR reaction, but also can effectively suppress the recombination of useful photogenerated electrons and holes. As a result, the optimized TiO 2 @ZnIn 2 S 4 heterojunction exhibits high PCR performance, and the total CO 2 photoreduction conversion rates (the sum yield of CO, CH 3 OH and CH 4 ) are obviously higher than those of blank ZnIn 2 S 4 , TiO 2 , and ex situ prepared TiO 2 -ZnIn 2 S 4 composite. Finally, S-scheme mechanism is also thoroughly analyzed and discussed in this work.Reasonable design of efficient hierarchical photocatalysts has gained significant attention. Herein, a step-scheme (S-scheme) core-shell TiO 2 @ZnIn 2 S 4 heterojunction is designed for photocatalytic CO 2 redu...

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“…It was speculated that W atoms were adjacent to the oxygen vacancies-rich region, resulting in high electron concentration around vacancies [ 34 ]. These results further proved the intimate interface contact between Sov−BWO and T−ZIS [ 35 ]. Moreover, the strong electronic interaction was achieved by the S 2− doping and construction of electron bridge, which was conducive to the spatial separation and transport of charge in Sov−50BWO/T−ZIS Z-scheme heterojunction.…”

Section: Resultsmentioning

confidence: 52%

Investigation of the Kinetics and Reaction Mechanism for Photodegradation Tetracycline Antibiotics over Sulfur-Doped Bi2WO6-x/ZnIn2S4 Direct Z-Scheme Heterojunction

Jiang

Huang

Wei³

et al. 2021

Nanomaterials

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The rational design of direct Z-scheme heterostructural photocatalysts using solar energy is promising for energy conversion and environmental remediation, which depends on the precise regulation of redox active sites, rapid spatial separation and transport of photoexcited charge and a broad visible light response. The Bi2WO6 materials have been paid more and more attention because of their unique photochemical properties. In this study, S2− doped Bi2WO6-x coupled with twin crystal ZnIn2S4 nanosheets (Sov−BWO/T−ZIS) were prepared as an efficient photocatalyst by a simple hydrothermal method for the removal of tetracycline hydrochloride (TCH). Multiple methods (XRD, TEM, XPS, EPR, UV vis DRS, PL etc.) were employed to systematically investigate the morphology, structure, composition and photochemical properties of the as-prepared samples. The XRD spectrum indicated that the S2− ions were successfully doped into the Sov−BWO component. XPS spectra and photoelectrochemical analysis proved that S2− served as electronic bridge and promoted captured electrons of surface oxygen vacancies transfer to the valence band of T−ZIS. Through both experimental and in situ electron paramagnetic resonance (in situ EPR) characterizations, a defined direct Z-scheme heterojunction in S-BWO/T−ZIS was confirmed. The improved photocatalytic capability of S-BWO/T−ZIS results ascribed that broadened wavelength range of light absorption, rapid separation and interfacial transport of photoexcited charge, precisely regulated redox centers by optimizing the interfacial transport mode. Particularly, the Sov−50BWO/T−ZIS Z-scheme heterojunction exhibited the highest photodegradation rate was 95% under visible light irradiation. Moreover, this heterojunction exhibited a robust adsorption and degradation capacity, providing a promising photocatalyst for an organic pollutant synergistic removal strategy.

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Construction of S-scheme Bi2WO6/g-C3N4 heterostructure nanosheets with enhanced visible-light photocatalytic degradation for ammonium dinitramide

Cited by 166 publications

References 62 publications

S‐Scheme Photocatalytic Systems

S‐Scheme Photocatalytic Systems

In situ Irradiated XPS Investigation on S‐Scheme TiO₂@ZnIn₂S₄ Photocatalyst for Efficient Photocatalytic CO₂ Reduction

Investigation of the Kinetics and Reaction Mechanism for Photodegradation Tetracycline Antibiotics over Sulfur-Doped Bi2WO6-x/ZnIn2S4 Direct Z-Scheme Heterojunction

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Construction of S-scheme Bi2WO6/g-C3N4 heterostructure nanosheets with enhanced visible-light photocatalytic degradation for ammonium dinitramide

Cited by 166 publications

References 62 publications

S‐Scheme Photocatalytic Systems

S‐Scheme Photocatalytic Systems

In situ Irradiated XPS Investigation on S‐Scheme TiO2@ZnIn2S4 Photocatalyst for Efficient Photocatalytic CO2 Reduction

Investigation of the Kinetics and Reaction Mechanism for Photodegradation Tetracycline Antibiotics over Sulfur-Doped Bi2WO6-x/ZnIn2S4 Direct Z-Scheme Heterojunction

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In situ Irradiated XPS Investigation on S‐Scheme TiO₂@ZnIn₂S₄ Photocatalyst for Efficient Photocatalytic CO₂ Reduction