废弃吸附剂衍生的钴修饰碳材料活化过氧单硫酸盐降解双酚A

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摘要首先合成了一种羧甲基壳聚糖气凝胶(CMCS)吸附剂,并将其应用于净化钴离子废水;然后对吸附钴离子后的废弃吸附剂进行改性和煅烧,合成了负载钴纳米颗粒氮掺杂碳材料(Co@NC-800),并将其应用于活化过氧单硫酸盐(PMS)降解双酚A(BPA)。结合动力学分析与多种表征手段结果共同证明了Co纳米颗粒是主要的活性位点;并通过调控煅烧温度,探明石墨氮有利于提高Co纳米颗粒与碳载体的协同作用,从而促进PMS的活化。自由基淬灭实验和电化学测试分析确定了硫酸根自由基(SO^·-₄)和羟基自由基(·OH)是Co@NC-800/PMS体系中主要的功能活性物种。本研究为废水固废物高效利用制备催化剂材料提供了一种新的思路。

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	郭旭
	张启成
	贺宏伟
	张凤宝
	范晓彬
	李阳

关键词：钴纳米颗粒过硫酸盐石墨氮硫酸根自由基(SO^·-₄) 羟基自由基(· OH)

Abstract： Firstly, a carboxymethyl chitosan aerogel (CMCS) adsorbent is synthesized and applied to purify cobalt ion wastewater. Then, the waste adsorbent after adsorption of cobalt ions is modified and calcined to synthesize the nitrogen-doped carbon material loaded with cobalt nanoparticles (Co@NC-800), which is applied to activate peroxymonosulfate (PMS) to degrade bisphenol A (BPA). Combined with kinetic analysis and a variety of characterization methods, it is proved that Co nanoparticles are the main active sites. By regulating the calcination temperature, it is found that graphite nitrogen is beneficial to improve the synergistic effect of Co nanoparticles and carbon substrate, thus promoting the activation of PMS. Radical quenching experiments and electrochemical analysis confirm that sulfate radical (SO^·-₄) and hydroxyl radical (·OH) are the main functional active species in the Co@NC-800/PMS system. This study provides a new approach for the efficient utilization of wastewater solid waste to prepare catalyst materials.

Keywords： cobalt nanoparticles peroxymonosulfate graphite nitrogen sulfate radical(SO^· -₄) hydroxyl radical(· OH)

Received 2023-04-03;

Fund:国家自然科学基金(U20A20153,22078242)。

Corresponding Authors: 李阳,副研究员,E-mail:liyang1895@tju.edu.cn。 Email: liyang1895@tju.edu.cn

About author: 郭旭(1998-),男,硕士研究生,现从事废水处理方面的研究。

引用本文:

郭旭, 张启成, 贺宏伟, 张凤宝, 范晓彬, 李阳.废弃吸附剂衍生的钴修饰碳材料活化过氧单硫酸盐降解双酚A[J]. 化学工业与工程, 2023,40(6): 1-14

GUO Xu, ZHANG Qicheng, HE Hongwei, ZHANG Fengbao, FAN Xiaobin, LI Yang.Waste adsorbent derived cobalt modified carbon material for bisphenol A degradation by activating peroxymonosulfate[J]. Chemcial Industry and Engineering, 2023,40(6): 1-14

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