Citation: Tian Wang, Jianjun Zhou, Wenjuan Wang, Yunqing Zhu, Junfeng Niu. Ag-single atoms modified S_1.66-N_1.91/TiO₂_-x for photocatalytic activation of peroxymonosulfate for bisphenol A degradation[J]. Chinese Chemical Letters, ;2022, 33(4): 2121-2124. doi: 10.1016/j.cclet.2021.08.085 shu

Ag-single atoms modified S_1.66-N_1.91/TiO₂_-x for photocatalytic activation of peroxymonosulfate for bisphenol A degradation

Tian Wang ^a ,
Jianjun Zhou ^a ,
Wenjuan Wang ^a ,
Yunqing Zhu ^{a, *,} ,
Junfeng Niu ^{a, b}

a.
School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
b.
School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China

zhuyunqing@sust.edu.cn

Received Date: 30 May 2021
Revised Date: 2 July 2021
Accepted Date: 18 August 2021
Available Online: 22 August 2021

Figures(4)

In this study, Ag_0.23/(S_1.66-N_1.91/TiO₂_-x) single-atom photocatalyst was synthesized by in-situ photo-reducing of silver on S, N-TiO₂_-x nanocomposite and used to degrade bisphenol A (BPA) through heterogeneous activation of potassium peroxymonosulfate (PMS) under visible-light illumination. The structure, physicochemical property, morphology, and electronic property were evalutated by X-ray diffraction (XRD), Raman spectrum, X-ray photoelectron spectra (XPS), high-resolution transmission electron microscopy (HR-TEM), UV–vis diffuse reflectance spectra (UV-vis DRS), electron paramagnetic resonance (EPR) spectrum. Ag_0.23/(S_1.66-N_1.91/TiO₂_-x) single-atom photocatalyst exhibited 2.4 times higher activity for the synergetic degradation of BPA than that of its counterpart, and 48.73% mineralization rate of BPA also achieved. It was ascribed to the uniformly-dispersed metallic Ag atoms as the active site for accelerating the migration rate of photo-generated carrier for generation of high reactive radicals. The EPR experiments indicated that SO₄^•‒ and ^•OH was jointly involved in BPA degradation.
- Photo-Fenton,
- Single-atomic photocatalyst,
- Sulfate radical,
- Bisphenol A,
- PMS
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沈阳化工大学材料科学与工程学院沈阳 110142

Ag-single atoms modified S1.66-N1.91/TiO2-x for photocatalytic activation of peroxymonosulfate for bisphenol A degradation

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通讯作者: 陈斌, bchen63@163.com

Ag-single atoms modified S_1.66-N_1.91/TiO₂_-x for photocatalytic activation of peroxymonosulfate for bisphenol A degradation