An efficient floating adsorption-photocatalyst to decarboxylate D-Glu and D-MeAsp of Microcystin-LR via holes direct oxidation
文献类型：期刊论文
| 作者 | Wang, Yarui; Chen, Fengjie; Yu, Wanchao; Zhao, Lixia |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2021-06-01 |
| 卷号 | 413页码:- |
| ISSN号 | 1385-8947 |
| 关键词 | Floating photocatalyst Decarboxylation Holes Microcystin-LR |
| 英文摘要 | Fates of toxic foundational groups of Microcystin-LR in aqueous have garnered widespread attention because of the difficulty of removal during photocatalytic process. Here, an efficient N, P co-doped TiO2/expanded graphite (NPTEG) floating material (NPTEG) modified by poly dimethyl diallyl ammonium chloride (PDDA) and graphitic carbon nitride (g-C3N4) (x PDDA-g-C3N4-NPTEG) was assembled and used to destroy the toxic foundational groups of MC-LR in water. g-C3N4 can match well with TiO2 to form heterojunction where holes can gather in the valence band of g-C3N4. PDDA is used to passivate the g-C3N4, and performs as holes transport layer during the photocatalytic process to promote the separation of electron-hole pairs. Under the direct interaction of photogenerated holes and free carboxyl groups of MC-LR adsorbed on the surface, the decarboxylation process in the free acid groups on D-glutamic acid (Glu) and methyl-D-aspartic acid (D-MeAsp) of MC-LR occurred which was authenticated by UPLC-ESI-MS/MS. Meanwhile, the conjugated double bond was also removed by hydroxylation, so as to achieve the goal of non-toxic site residues in the degradation process. Furthermore, the degradation byproducts toxicity and photocatalysts stability were explored. The results confirm that x PDDA-gC3N4-NPTEG exhibits excellent attacking ability of carboxylic acid groups of MC-LR and high recycle ability, which has great promise as a means of effectively treating drinking water. |
| WOS研究方向 | Engineering, Environmental ; Engineering, Chemical |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45656]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, 18 Shuangqing Rd,POB 2871, Beijing 100085, Peoples R China 3.UCAS, Sch Environm, Hangzhou Inst Adv Study, Hangzhou 310007, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yarui,Chen, Fengjie,Yu, Wanchao,et al. An efficient floating adsorption-photocatalyst to decarboxylate D-Glu and D-MeAsp of Microcystin-LR via holes direct oxidation[J]. CHEMICAL ENGINEERING JOURNAL,2021,413:-. |
| APA | Wang, Yarui,Chen, Fengjie,Yu, Wanchao,&Zhao, Lixia.(2021).An efficient floating adsorption-photocatalyst to decarboxylate D-Glu and D-MeAsp of Microcystin-LR via holes direct oxidation.CHEMICAL ENGINEERING JOURNAL,413,-. |
| MLA | Wang, Yarui,et al."An efficient floating adsorption-photocatalyst to decarboxylate D-Glu and D-MeAsp of Microcystin-LR via holes direct oxidation".CHEMICAL ENGINEERING JOURNAL 413(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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