Synthesis and photocatalytic mechanism of visible-light-driven Ag/AgBr/(I/S) composites for organic dyes degradation

Li, Li; Yang, Xiande; Xie, Chuanfang; Wang, Yongqian; Liang, Wei; Yang, Jing

doi:10.1016/j.optmat.2021.111947

Cited by 14 publications

(4 citation statements)

References 59 publications

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“…The two stages are supposedly related to the dye adsorption process [11] and photocatalytic degradation reaction [39]. The dye adsorption process by catalysts can be demonstrated in the dark condition [40][41][42]. In this work, the kinetic process in the dark is clearly divided into two stages, indicating the coexistence of the adsorption process and degradation reaction under the dark condition.…”

Section: Resultsmentioning

confidence: 63%

“…Compared with the scavenger-free sample, with a degradation rate of 89% at 40 min, the photocatalytic degradation rate decreases to 10% and 4% after the addition of methanol and EDTA, respectively. The result indicates that both •OH and h + are the major reactive species [40,41]. The MO molecules could be degraded into CO 2 , H 2 O, NO 3 − , SO 4 2− , and other incomplete products after the reaction with active radicals [18].…”

Section: Resultsmentioning

confidence: 99%

“…EDTA and methanol were added in the photocatalytic degradation of MO to investigate the main active species, such as h + , •OHs [40,41]. The experiments were carried out under the illumination of xenon lamp.…”

Section: Photocatalytic Degradation Of Dyementioning

confidence: 99%

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In Situ Partial Sulfidation for Preparing Cu/Cu2−xS Core/Shell Nanorods with Enhanced Photocatalytic Degradation

Zhong

Wang

et al. 2022

Catalysts

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Herein, we report an approach to prepare Cu/Cu2−xS core/shell nanorods by in situ sulfidation of copper nanorods. Firstly, copper nanorods with tunable longitudinal surface plasmon resonances were synthesized by a seed-mediated method using Au nanoparticles as seeds. A convenient in situ sulfidation method was then applied to convert the outermost layer of Cu nanorods into Cu2−xS, to increase their stability and surface activity in photocatalytic applications. The thickness of Cu2−xS layer can be adjusted by controlling the amount of S source. The Cu/Cu2−xS core/shell nanorods exhibits two characteristic surface plasmon resonances located in visible and near-infrared regions, respectively. The photocatalytic performances of Cu nanorods and their derivatives were evaluated by measuring the degradation rate of methyl orange dyes. Compared with Cu nanorods, the Cu/Cu2−xS core/shell nanorods demonstrate more than a 13.6-fold enhancement in the degradation rate at 40 min. This work suggests a new direction for constructing derivative nanostructures of copper nanorods and exploring their applications.

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Section: Resultsmentioning

confidence: 63%

Section: Resultsmentioning

confidence: 99%

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In Situ Partial Sulfidation for Preparing Cu/Cu2−xS Core/Shell Nanorods with Enhanced Photocatalytic Degradation

Zhong

Wang

et al. 2022

Catalysts

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“…These free radicals work together to degrade pollutants in the water. TiO 2 is considered as one of the most promising photocatalysts (Li et al, 2022). Due to its advantages of environmental friendliness and simple preparation, more and more researchers are devoted in the eld of photocatalytic degradation of organic pollutants in water.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of CaWO 4 as a photocatalyst for degradation of methylene blue and carmine under ultraviolet light irradiation

Yuan

Sun

et al. 2022

Preprint

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Due to its advantages of high efficiency, simplicity of operation, and no secondary pollution, photocatalysis is considered as a promising method for wastewater treatment. Most synthesized photocatalysts are structure complex and costly. Thus, in this study, a novel CaWO4 sample was synthesized by a co-precipitation method in one step and proved as a preferable photocatalytic material by a series of characterization methods. The synthesized CaWO4 can be used as a catalyst to degrade dyes as methylene blue (MB) and carmine (CR), under UV light without the addition of oxidants. The effects of water matrix, including pH value, solid-liquid ratio, light intensity, and initial concentration of pollutants on photocatalytic degradation were studied. According to the results of scavengers experiments, holes and hydroxyl radicals dominate the degradation of MB while hydroxyl radical and superoxide anion are mainly responsible for the degradation of CR. Furthermore, i-t curves demonstrate the CaWO4 has good photoelectric response capability. It means that photogenerated electrons generated on the surface of the CaWO4 can form electron hole pairs, thereby forming hydroxyl radical and superoxide anion to degrade dyes. In addition, the CaWO4 has good cycling performance in the process of degrading MB. Results indicate that minerals-based photocatalyst can be synthesized in one step by simple coprecipitation and exhibit good photocatalytic effect. It provides a new idea for the study of photocatalytic degradation of dyes by mineral-like materials.

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Transformation of corn cob waste into mesoporous carbon by template-free method and construction of TiO2-mesoporous carbon nanocomposite for MO dye degradation

Shinde,

Nille,

Shinde

et al. 2023

J Mater Sci: Mater Electron

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Synthesis and photocatalytic mechanism of visible-light-driven Ag/AgBr/(I/S) composites for organic dyes degradation

Cited by 14 publications

References 59 publications

In Situ Partial Sulfidation for Preparing Cu/Cu2−xS Core/Shell Nanorods with Enhanced Photocatalytic Degradation

In Situ Partial Sulfidation for Preparing Cu/Cu2−xS Core/Shell Nanorods with Enhanced Photocatalytic Degradation

Synthesis of CaWO 4 as a photocatalyst for degradation of methylene blue and carmine under ultraviolet light irradiation

Transformation of corn cob waste into mesoporous carbon by template-free method and construction of TiO2-mesoporous carbon nanocomposite for MO dye degradation

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