In-situ synthesis of Bi2S3 quantum dots for enhancing photodegradation of organic pollutants

Qu, Xiaofei; Gao, Zhaoqun; Li, Meihua; Zhai, Hongjie; Shi, Liang; Li, Yang; Song, Hongbing

doi:10.1016/j.apsusc.2019.144047

Cited by 21 publications

(5 citation statements)

References 48 publications

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“…Transition metal sulfides, with a wide range of sources, are used in biomedicine, optical devices, CO 2 reduction, photocatalysts and many other cutting-edge scientific aspects. [34][35][36][37] ZnS, as a classic transition metal sulfide, has been broadly applied in LED (light-emitting diodes), electroluminescence, photocatalysis, and many other aspects. [38] ZnS nanoparticles can easily synthetized by hydrothermal synthesis and it takes advantage of good thermal stability, low production cost and nonpoisonous.…”

Section: Introductionmentioning

confidence: 99%

In Situ Hydrothermal Synthesis of ZnS/TiO₂ Nanofibers S‐Scheme Heterojunction for Enhanced Photocatalytic H₂ Evolution

Wang

et al. 2022

Advanced Sustainable Systems

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Photocatalysts with step‐scheme (S‐scheme) heterojunctions exhibit huge potential in hydrogen evolution via photocatalytic water splitting, which is regarded as a promising technology to solve the energy crisis and environmental issues. In this work, S‐scheme heterojunction photocatalysts are constructed by in situ depositing ZnS nanoparticles on TiO2 nanofibers via hydrothermal method. A highly improved photocatalytic H2 evolution rate is achieved for the ZnS/TiO2 heterojunction as compared to the mono‐component ZnS and TiO2. Remarkably, the TiO2/ZnS‐5 (TZ‐5) sample possesses the highest H2 evolution rate of 5503.8 µmol g‐1 h‐1, which is 4.8 times of ZnS and 38.8 times of TiO2, respectively. The observed photocatalytic performance improvement is mainly attributed to the construction of an S‐scheme heterojunction, which results in the fast separation of the photogenerated e−–h+ pairs and enhanced redox capacity of the system. This work may provide inspirations and designing references for developing high‐performance S‐scheme heterojunction photocatalysts.

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Section: Introductionmentioning

confidence: 99%

In Situ Hydrothermal Synthesis of ZnS/TiO₂ Nanofibers S‐Scheme Heterojunction for Enhanced Photocatalytic H₂ Evolution

Wang

et al. 2022

Advanced Sustainable Systems

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“…Because of the energy shortage and the pressure of environmental protection, it is particularly important to develop new forms of energy other than fossil fuels. Photocatalytic hydrogen production has great potential because it is derived from natural sources such as water and solar energy, which are highly available, renewable and environmentally friendly (Suk et al 2012;Qu et al 2020). Since water splitting has been achieved on TiO 2 electrodes through a photoelectrochemical (PEC) approach to produce hydrogen, semiconductor technology for the photocatalytic decomposition of water has attracted the attention of many researchers (Fujishima and Honda 1972).…”

Section: Introductionmentioning

confidence: 99%

Study on the relationship between Bi2S3 with different morphologies and its photocatalytic hydrogen production performance

Lang

Xiao

et al. 2022

J Anal Sci Technol

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The morphology of a material is considered one of the primary aspects affecting its photocatalytic performance. Various methods have been developed to tailor the morphology of photocatalytic materials for photocatalytic water splitting. Bi2S3 is an excellent photoabsorption material with relatively narrow band gaps. Herein, Bi2S3 samples with different morphologies are successfully prepared via a simple one-step hydrothermal method and employed effectively as visible light-driven photocatalysts for hydrogen production. Electron microscopy technologies were used to characterize the morphology and microstructure of the Bi2S3 samples, which exhibit three kinds of morphologies, namely nanotubes, nanoflowers and nanorods. As a result, the Bi2S3 nanotubes have the largest BET specific surface area and lowest PL intensity, and these characteristics lead to having the best hydrogen production rate. Moreover, the catalysis mechanism is simply explained by studying the relationship between the morphology and microstructure of a material and its photocatalytic performance.

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“…Bi 4 NbO 8 Cl, a promising candidate for increasing lightharvesting with several merits including narrow band gap (~2.38 eV), layered structure, appropriate potential of energy band [15][16][17], appears in the sight of researchers. Due to its low band gap energy and layered structure, this material could absorb light with a wavelength under 520 nm and benefit to charge transfer [18].…”

Section: Introductionmentioning

confidence: 99%

“…Due to its low band gap energy and layered structure, this material could absorb light with a wavelength under 520 nm and benefit to charge transfer [18]. Some heterojunctions based on Bi 4 NbO 8 Cl have been prepared, such as Bi 2 S 3 /Bi 4 NbO 8 Cl [17] and g-C 3 N 4 / Bi 4 NbO 8 Cl [19]. Therefore, constructing ZnTiO 3 /Bi 4 N-bO 8 Cl heterojunction may be a useful measure to enhance photocatalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Construction of ZnTiO3/Bi4NbO8Cl heterojunction with enhanced photocatalytic performance

Gao

2020

Nanoscale Res Lett

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Constructing heterojunction is an effective strategy to enhance photocatalytic performance of photocatalysts. Herein, we fabricated ZnTiO 3 /Bi 4 NbO 8 Cl heterojunction with improved performance via a typical mechanical mixing method. The rhodamine (RhB) degradation rate over heterojunction is higher than that of individual ZnTiO 3 or Bi 4 NbO 8 Cl under Xenon-arc lamp irradiation. Combining ZnTiO 3 with Bi 4 NbO 8 Cl can inhibit the recombination of photo-excited carriers. The improved quantum efficiency was demonstrated by transient-photocurrent responses (PC), electrochemical impedance spectroscopy (EIS), photoluminescence (PL) spectra, and time-resolved PL (TRPL) spectra. This research may be valuable for photocatalysts in the industrial application.

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In-situ synthesis of Bi2S3 quantum dots for enhancing photodegradation of organic pollutants

Cited by 21 publications

References 48 publications

In Situ Hydrothermal Synthesis of ZnS/TiO₂ Nanofibers S‐Scheme Heterojunction for Enhanced Photocatalytic H₂ Evolution

In Situ Hydrothermal Synthesis of ZnS/TiO₂ Nanofibers S‐Scheme Heterojunction for Enhanced Photocatalytic H₂ Evolution

Study on the relationship between Bi2S3 with different morphologies and its photocatalytic hydrogen production performance

Construction of ZnTiO3/Bi4NbO8Cl heterojunction with enhanced photocatalytic performance

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In-situ synthesis of Bi2S3 quantum dots for enhancing photodegradation of organic pollutants

Cited by 21 publications

References 48 publications

In Situ Hydrothermal Synthesis of ZnS/TiO2 Nanofibers S‐Scheme Heterojunction for Enhanced Photocatalytic H2 Evolution

In Situ Hydrothermal Synthesis of ZnS/TiO2 Nanofibers S‐Scheme Heterojunction for Enhanced Photocatalytic H2 Evolution

Study on the relationship between Bi2S3 with different morphologies and its photocatalytic hydrogen production performance

Construction of ZnTiO3/Bi4NbO8Cl heterojunction with enhanced photocatalytic performance

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In Situ Hydrothermal Synthesis of ZnS/TiO₂ Nanofibers S‐Scheme Heterojunction for Enhanced Photocatalytic H₂ Evolution

In Situ Hydrothermal Synthesis of ZnS/TiO₂ Nanofibers S‐Scheme Heterojunction for Enhanced Photocatalytic H₂ Evolution