Sulfadiazine oxidation by peroxodisulfate and cobalt loaded graphitic biochar system: The dominant role of graphitic domain
Sulfadiazine oxidation by peroxodisulfate and cobalt loaded graphitic biochar system: The dominant role of graphitic domain
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过二硫酸盐和负载钴的石墨生物炭系统氧化磺胺嘧啶：石墨结构域的主导作用
DOI：
10.1016/j.cej.2022.140744
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发表时间：
2022-12
影响因子：
15.1
通讯作者：
Xuliang Zhuang
中科院分区：
文献类型：
--
作者：
Qiuhui Zhu;Kaixuan Guo;Shuanglong Ma;Shulian Wang;Xiaodan Tang;Ran Duan;Yan Huang;Jingzhen Wang;Gong Cheng;Shengjun Xu;Xuliang Zhuang
采用浸渍-热解、酸蚀、二次退火等方法制备了一系列钴/生物炭复合催化剂。考察了催化剂对过硫酸盐（PDS）的活化能力，其中比表面积和石墨化度最大的催化剂对磺胺嘧啶（SDZ）的降解性能最好。机理研究的结果排除了Co物种对PDS活化的重要贡献，并指出单一的电子传递途径在催化剂和PDS之间形成的内球复合物（催化剂/PDS*）中起着至关重要的作用，该复合物可以捕获SDZ中的电子，导致SDZ的氧化。具有良好导电性的石墨碳是催化剂的活性中心，特别是沿轴向的石墨微晶比沿轴向的石墨烯片在催化降解中的作用更大.石墨化程度越高的催化剂/PDS* 氧化还原电位越高，氧化能力越强。考察了催化剂和PDS体系的选择性降解能力。在4种降解途径中共鉴定出8种降解中间产物，其中大部分转化产物的毒性低于SDZ。
A series of Co and biochar composite catalysts were fabricated by impregnation-pyrolyzation, acid-etching, and second annealing. The peroxodisulfate (PDS) activation capacity of these catalysts were evaluated among which the catalyst with largest surface area and graphitization degree achieved the best sulfadiazine (SDZ) degradation performance. The result of mechanism research excluded the essential contribution of Co species toward PDS activation, and pinpointed the paramount role of a single electron transfer pathway involved the formation of inner sphere complexes between catalyst and PDS (catalyst/PDS*), which could capture electron from SDZ, resulting in SDZ oxidation. The graphitic carbon with excellent electronic conductivity was discerned as the active site and especially the graphite microcrystals alongcaxis played more significant role in the catalytic degradation than the graphene sheet alongaaxis. The catalyst/PDS* originated from these catalysts with more graphitization degree possessed higher redox potentials and thereby stronger oxidation capacity. The selective degradation capacity of prepared catalyst and PDS system was demonstrated. Eight degradation intermediates from four proposed degradation pathways were identified and the toxicity of most transformation products was lower than that of SDZ.
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影响因子：
12.8
作者：
Wentian Zheng;Yanbiao Liu;Wen Liu;Haodong Ji;Fang Li;Chensi Shen;Xiaofeng Fang;X. Li;
通讯作者：
Wentian Zheng;Yanbiao Liu;Wen Liu;Haodong Ji;Fang Li;Chensi Shen;Xiaofeng Fang;X. Li;
γ-γ共轭驱动过一硫酸盐活化，消除无金属石墨化聚酰亚胺表面的污染物
影响因子：
13.6
作者：
Cao Wenrui;Luo Yongxiang;Cai Xuanying;Wang Shuguang;Hu Chun;Lyu Lai
通讯作者：
Lyu Lai
影响因子：
11.4
作者：
Tianran Sun;B. Levin;Michael P. Schmidt;Juan J. L. Guzman;A. Enders;C. Martínez;D. Muller;L. T. Ang
通讯作者：
Tianran Sun;B. Levin;Michael P. Schmidt;Juan J. L. Guzman;A. Enders;C. Martínez;D. Muller;L. T. Ang
影响因子：
13.6
作者：
Hui Jin;Zhizhi Cang;Weijing Ding;Wentong Wu;Hongkun Ma;Chenxi Wang;Zhongwei Qi;Zifu Li
通讯作者：
Hui Jin;Zhizhi Cang;Weijing Ding;Wentong Wu;Hongkun Ma;Chenxi Wang;Zhongwei Qi;Zifu Li
影响因子：
15.1
作者：
Luo, Junmei;Bo, Shufeng;Zhai, Shangru
通讯作者：
Zhai, Shangru