多羧酸镍配合物催化降解罗丹明B的活性与机理

doi:10.11896/cldb.24030040

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Abstract With the rapid expansion of textile and printing industry scale, the dye wastewater generated in the production process has brought huge pressure to living environment. At present, in the field of remediation and treatment of dye wastewater, advanced oxidation technology based on SO₄^·- has attracted much attention due to its oxidation advantages. In general, peroxymonosulfate (PMS) can self-decompose to produce SO₄^·-, but the efficiency is low, so searching for an effective PMS catalyst has become a focus recently. Here a 3D complex Ni₄(odip)₂-(μ₂-OH₂)₂(H₂O)₈ was prepared by solvothermal method using 5, 5′-oxydiisophthalic acid (H₄odip) and Ni(NO₃)₂·6H₂O, which has good water stability and can exist stably in weak acid and weak alkali environment. To study it’s structure and composition, X-ray single crystal and powder diffraction, infrared spectroscopy, thermogravimetric analysis and elemental analyses are adopted here. The activity and mechanism of catalytic degradation of Rhodamine B were tested by UV-Vis spectrophotometer. At the same time, the effects of the complex and peroxymonosulfate loading, reaction temperature and pH on dye degradation were systematically studied. Compared with no catalyst, the degradation rate of Rhodamine B was increased by two times with the addition of the complex. In the neutral environment, the PMS/complex catalytic system has a stronger degradation ability, and the degradation rate can reach 92.3%. A comprehensive analysis of the active oxygen species (ROS) capture experiment and electron paramagnetic resonance (EPR) test results confirmed that the ROS produced by the PMS/complex system include SO₄^·-, ·OH, ¹O₂ and O₂^·-, and the contribution of the four ROS in the degradation of rhodamine B was similar. Therefore, the complex can be used as an effective and recyclable new heterogeneous catalyst in the field of catalytic PMS for dye wastewater remediation.

Key words： complex peroxymonosulfate (PMS) catalytic degradation rhodamine B (RhB) activity and mechanism

Published: 25 August 2024 Online: 2024-09-10

CLC number:

O614.81⁺2

Fund:Natural Science Foundation of Shaanxi Province (2023-JC-QN-0173, 2023-YBSF-595), Scientific Research Program Funded by Shaanxi Provincial Education Department (22JK0605), Key Research and Development Plan of Xianyang City (L2023-ZDYF-QYCX-030), College Students’ Innovation and Entrepreneurship Training Program (xysfxy2024169) and Xianyang Normal University Research Project (2023YB23, sjxm202414).

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	Articles by authors
	LIU Yang
	MA Zhanying
	LI Wuwu
	GUO Naini
	HOU Lei
	FAN Xingyu
	WANG Ying’ai
	WANG Yaoyu

Cite this article:

LIU Yang,MA Zhanying,LI Wuwu, et al. Activity and Mechanism of Catalytic Degradation of Rhodamine B by Ni(Ⅱ) Complex Derived from Polycarboxylate Ligand[J]. Materials Reports, 2024, 38(16): 24030040-6.

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http://www.mater-rep.com/EN/10.11896/cldb.24030040 OR http://www.mater-rep.com/EN/Y2024/V38/I16/24030040

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