Citation: Bin Zhang, Xu He, Chengze Yu, Guocheng Liu, Dong Ma, Chunyue Cui, Qinghua Yan, Yingjie Zhang, Guangshan Zhang, Jun Ma, Yanjun Xin. Degradation of tetracycline hydrochloride by ultrafine TiO₂ nanoparticles modified g-C₃N₄ heterojunction photocatalyst: Influencing factors, products and mechanism insight[J]. Chinese Chemical Letters, ;2022, 33(3): 1337-1342. doi: 10.1016/j.cclet.2021.08.008 shu

Degradation of tetracycline hydrochloride by ultrafine TiO₂ nanoparticles modified g-C₃N₄ heterojunction photocatalyst: Influencing factors, products and mechanism insight

Bin Zhang ^{a, b} ,
Xu He ^b ,
Chengze Yu ^a ,
Guocheng Liu ^a ,
Dong Ma ^a ,
Chunyue Cui ^a ,
Qinghua Yan ^a ,
Yingjie Zhang ^c ,
Guangshan Zhang ^a ,
Jun Ma ^{a, b} ,
Yanjun Xin ^{a, *,}

a.
Qingdao Engineering Research Center for Rural Environment, Water Resources Protection and Utilization Center for Rural Areas, Qingdao Agricultural University, Qingdao 266109, China
b.
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
c.
School of Marine Science and Technology, Sino-Europe Membrane Technology Research Institute Harbin Institute of Technology, Weihai 264209, China

xintom2000@126.com

Received Date: 9 May 2021
Revised Date: 19 July 2021
Accepted Date: 4 August 2021
Available Online: 10 August 2021

Figures(4)

The unique heterojunction photocatalyst of graphite carbon nitride (g-C₃N₄) modified ultrafine TiO₂ (g-C₃N₄/TiO₂) was successfully fabricated by electrochemical etching and co-annealing method. However, the effects of various environmental factors on the degradation of TC by g-C₃N₄/TiO₂ and the internal reaction mechanism are still unclear. In this study, the effects of initial pH, anions, and cations on the photocatalytic degradation of tetracycline hydrochloride (TC) by g-C₃N₄/TiO₂ were systematically explored, and the scavenging experiment and intermediate detection were conducted to better reveal the mechanism on photocatalytic degradation of TC. The results showed that the removal efficiency of photocatalytic degradation of TC by g-C₃N₄/TiO₂ could reach 99.04% under Xenon lamp irradiation within 120 min. The unique g-C₃N₄/TiO₂ heterojunction photocatalyst showed excellent photocatalytic performance for the degradation of TC at pH 3~7, and possesses outstanding anti-interference ability to NO₃⁻, Cl⁻, Na⁺, Ca²⁺ and Mg²⁺ ions in natural waters during the photocatalytic degradation TC process. Superoxide radicals (O₂^·−) and hydroxyl radicals (^·OH) were proved as the main reactive species for TC degradation, and the possible mechanism of the unique photocatalytic system for g-C₃N₄/TiO₂ was also proposed. The above results can provide a reliable basis and theoretical guidance for the design and application of visible photocatalyst with high activity to degrade the actual wastewater containing TC.
- Photocatalytic,
- TiO₂,
- G-C₃N₄,
- Tetracycline hydrochloride,
- Mechanism
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Degradation of tetracycline hydrochloride by ultrafine TiO2 nanoparticles modified g-C3N4 heterojunction photocatalyst: Influencing factors, products and mechanism insight

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通讯作者: 陈斌, bchen63@163.com

Degradation of tetracycline hydrochloride by ultrafine TiO₂ nanoparticles modified g-C₃N₄ heterojunction photocatalyst: Influencing factors, products and mechanism insight