Band structure and enhanced photocatalytic degradation performance of Mg-doped CdS nanorods

Feng, Chang; Chen, Zhuanyuan; Jing, Jiangping; Sun, Mengmeng; Tong, Hongtao; Hou, Jian

doi:10.1016/j.physb.2020.412363

Cited by 19 publications

(4 citation statements)

References 30 publications

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“…The intensities of these transitions were less in the PL spectrum of C-BMO than U-BMO, which indicates that the carbon doping has improved the charge separation in C-BMO compared to the undoped U-BMO. Therefore, the band gap widening inhibits the recombination of photogenerated charge carriers in C-BMO; as a result, this material is showing improved photocatalytic activity than U-BMO toward MG and CF pollutant degradation under visible light irradiation …”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the band gap widening inhibits the recombination of photogenerated charge carriers in C-BMO; as a result, this material is showing improved photocatalytic activity than U-BMO toward MG and CF pollutant degradation under visible light irradiation. 62 To understand the photogenerated charge carrier transfer behavior in C-BMO, U-BMO, and TBA-Mo8, the transient photocurrent responses and electrochemical impedance spectra (EIS) were measured. The photocurrent response in C-BMO was higher than that in U-BMO and least in TBA-Mo8, which implies more charge carrier transfer and separation efficiency in C-BMO over other materials; see Figure 7c.…”

Section: Optical and Photoelectrochemical Properties Uvmentioning

confidence: 99%

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Transformation of a Polyoxometalate Precursor into Carbon Doped Bismuth Molybdate Nanosheets for the Visible Light Photocatalytic Degradation of Aqueous Pollutants

Singh,

Gupta,

Bedi

et al. 2024

ACS Appl. Nano Mater.

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Heterogeneous photocatalysis is a convenient and effective tool for eliminating toxic organic effluents from the textile and pharmaceutical industries. The analogous photocatalytic properties of polyoxometalates (POMs) with metal oxide-based semiconductors make them applicable for photocatalytic wastewater treatment applications. However, the high aqueous solubility and low coverage of the visible solar spectrum limit the wider applicability of traditional POMs as heterogeneous photocatalysts. Herein, we report, for the first time, the hydrothermal transformation of a UV-active polyoxometalate precursor, (C 16 H 36 N) 4 [Mo 8 O 26 ] abbreviated as TBA-Mo8, into a visible light active photocatalytic carbon-doped Bi 2 MoO 6 nanosheets (C-BMO) in the presence of a Bi 3+ salt and studied its catalytic activities toward the degradation of a dye pollutant, malachite green (MG), and a pharmaceutical pollutant, ciprofloxacin (CF). For comparison purposes, an undoped Bi 2 MoO 6 (U-BMO) nanosheet was also prepared under identical conditions starting from an in situ generated POM precursor H 4 [Mo 8 O 26 ]. The successful transformation of TBA-Mo8 and H 4 [Mo 8 O 26 ] into Bi 2 MoO 6 photocatalysts under hydrothermal conditions was confirmed through a series of analytical and spectroscopic techniques, including Fourier transform infrared, Raman, X-ray photoelectron spectroscopy, X-ray diffraction, scanning electron spectroscopy, highresolution transmission electron spectroscopy, and other analyses. The results of the photocatalytic experiments revealed superior catalytic activities of C-BMO compared to U-BMO and the parent cluster TBA-Mo8 under visible light irradiation. C-BMO achieved 70 and 87% degradation of MG and CF under visible light irradiation against the 29 and 35% degradation, respectively, shown by U-BMO. A plausible reason for the higher photocatalytic activity of C-BMO is its better charge separation due to the band gap modification resulting from carbon doping. The detailed pathways of MG and CF degradation have also been proposed based on scavenger studies and ESI-MS analyses of the photocatalytic degradation products. This work, therefore, summarizes how simple polyoxometalate can serve as precursors for developing better and more efficient visible light active photocatalysts under milder experimental procedures.

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Section: Resultsmentioning

confidence: 99%

Section: Optical and Photoelectrochemical Properties Uvmentioning

confidence: 99%

Transformation of a Polyoxometalate Precursor into Carbon Doped Bismuth Molybdate Nanosheets for the Visible Light Photocatalytic Degradation of Aqueous Pollutants

Singh,

Gupta,

Bedi

et al. 2024

ACS Appl. Nano Mater.

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“…The CdS nanorods were synthesized by a solvothermal method with a slight modification. Briefly, Cd(NO 3 ) 2 ·4H 2 O (2 mmol) and CH 4 N 2 S (6 mmol) were mixed in 50 mL of ethylenediamine.…”

Section: Methodsmentioning

confidence: 99%

Fabrication of TiO₂/CdS Heterostructure by Soluble Solid-State Titanium-oxo-Clusters for Fast Photocatalytic Degradation of Tetracycline

Luo

Sun

et al. 2023

J. Phys. Chem. C

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Dependent on the solubility of titanium-oxoclusters, the molar ratios of Ti/Cd in the composite can be adjusted precisely. Herein, a soluble solid-state titanium-oxocluster is employed as a Ti raw reactant to fabricate a TiO 2 /CdS photocatalyst with TiO 2 nanoparticles isolated on the surface of CdS nanorods for highly efficient degradation of tetracycline (TC). The comparative experiment shows that the composite with the Ti/Cd molar ratio at 0.5 exhibits the best photocatalytic performance, which can degrade 95% TC with an initial concentration of 10 mg/L under 12 min visible-light irradiation. The excellent photocatalytic ability of the TiO 2 /CdS composites made of soluble titanium-oxo-clusters is superior to those of the pure CdS and TiO 2 , which is attributed to not only the synergic effect of TiO 2 /CdS heterostructure on improvement of photogenerated electron−hole pairs' separation and lifetime but also the ideal dispersion of the isolated TiO 2 nanoparticles on the surface of CdS nanorods. This work presents a facile way to achieve a highly active catalyst with controllable TiO 2 -involved heterostructure for photocatalytic degradation.

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“…To date, to achieve noticeable photocatalytic H 2 production, a variety of strategies have been proposed to enhance the photocatalytic performance of CdS catalysts, including morphology control, [17][18][19][20] heteroatom doping, 21 heterojunction construction, [22][23][24] and cocatalyst loading. [25][26][27] As a novel and feasible concept, morphology control is a well-known solution to improve the photocatalytic performance of CdS, in terms of high separation of electron-hole pairs, rapid charge transport rates, and abundant active sites.…”

Section: Introductionmentioning

confidence: 99%

Self-assembly induction of reduced graphene oxide decorated CdS nanoboxes for photocatalytic hydrogen evolution

Wei¹,

Li²,

Ma³

et al. 2022

Sustainable Energy Fuels

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Band structure and enhanced photocatalytic degradation performance of Mg-doped CdS nanorods

Cited by 19 publications

References 30 publications

Transformation of a Polyoxometalate Precursor into Carbon Doped Bismuth Molybdate Nanosheets for the Visible Light Photocatalytic Degradation of Aqueous Pollutants

Transformation of a Polyoxometalate Precursor into Carbon Doped Bismuth Molybdate Nanosheets for the Visible Light Photocatalytic Degradation of Aqueous Pollutants

Fabrication of TiO₂/CdS Heterostructure by Soluble Solid-State Titanium-oxo-Clusters for Fast Photocatalytic Degradation of Tetracycline

Self-assembly induction of reduced graphene oxide decorated CdS nanoboxes for photocatalytic hydrogen evolution

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Band structure and enhanced photocatalytic degradation performance of Mg-doped CdS nanorods

Cited by 19 publications

References 30 publications

Transformation of a Polyoxometalate Precursor into Carbon Doped Bismuth Molybdate Nanosheets for the Visible Light Photocatalytic Degradation of Aqueous Pollutants

Transformation of a Polyoxometalate Precursor into Carbon Doped Bismuth Molybdate Nanosheets for the Visible Light Photocatalytic Degradation of Aqueous Pollutants

Fabrication of TiO2/CdS Heterostructure by Soluble Solid-State Titanium-oxo-Clusters for Fast Photocatalytic Degradation of Tetracycline

Self-assembly induction of reduced graphene oxide decorated CdS nanoboxes for photocatalytic hydrogen evolution

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Fabrication of TiO₂/CdS Heterostructure by Soluble Solid-State Titanium-oxo-Clusters for Fast Photocatalytic Degradation of Tetracycline