膨润土负载红磷复合材料的吸附富集-定位光降解性能

doi:10.15541/jim20190411

无机材料学报 ›› 2020, Vol. 35 ›› Issue (7): 803-808.DOI: 10.15541/jim20190411 CSTR: 32189.14.10.15541/jim20190411

所属专题：环境材料论文精选(2020)

膨润土负载红磷复合材料的吸附富集-定位光降解性能

朱恩权,马玉花(),艾尼瓦·木尼热,粟智()

新疆师范大学化学化工学院, 乌鲁木齐 830054

收稿日期:2019-08-12 修回日期:2019-11-07 出版日期:2020-07-20 网络出版日期:2019-12-15
作者简介:朱恩权(1992-), 男, 硕士研究生. E-mail: 1427830223@qq.com
ZHU Enquan (1992-), male, Master candidate. E-mail: 1427830223@qq.com
基金资助:
新疆维吾尔自治区自然科学基金(2019D01B36);新疆维吾尔自治区自然科学基金(2019D01A69);自治区“百名青年博士引进计划”天池博士项目(BS2017002);自治区高校科研计划项目(XJEDU2018Y030);新疆维吾尔自治区“天山青年计划”优秀青年科技人才项目(2017Q027);新疆师范大学博士科研启动项目(XJNUB1907);新疆师范大学“十三五”校级重点学科招标课题(17SDK0802);国家自然科学基金(21862022)

Adsorption-enrichment and Localized-photodegradation of Bentonite-supported Red Phosphorus Composites

ZHU Enquan,MA Yuhua(),AINIWA· Munire,SU Zhi()

College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi 830054, China

Received:2019-08-12 Revised:2019-11-07 Published:2020-07-20 Online:2019-12-15
Supported by:
Natural Science Foundation of Xinjiang Uygur Autonomous Region(2019D01B36);Natural Science Foundation of Xinjiang Uygur Autonomous Region(2019D01A69);Dr. Tianchi of the “Hundred Young Doctors Introduction Program” of the Autonomous Region(BS2017002);Natural Science Youth Project in Universities and Colleges of the Autonomous Region(XJEDU2018Y030);Tianshan Youth Talents Plan Project of Xinjiang(2017Q027);Ph.D. Startup Fund of Xinjiang Normal University(XJNUB1907);“13th Five-Year” Plan for Key Discipline Bidding Project of Xinjiang Normal University(17SDK0802);National Natural Science Foundation of China(21862022)

摘要/Abstract

摘要：

为了提高红磷催化剂的光催化性能, 选择剥离膨润土(EB)为载体, 将水热处理后的红磷(HRP)负载在EB上, 制得EB/HRP复合光催化剂, 并通过不同手段对催化剂进行表征。选择罗丹明B为模型污染物, 考察了EB/HRP复合光催化剂的光降解性能。结果表明, 随着EB含量的增加, EB/HRP复合光催化剂的光降解效率呈现先增加后减小的趋势, 当EB的质量分数为9%时, 复合光催化剂(EB₉/HRP)表现出最强的吸附性能和光降解性能, 其降解速率常数k值为0.0641 min^-1, 是HRP的2倍。另外, 经过五次循环光降解实验, EB₉/HRP仍具有较高的光催化活性(96.8%)。因此, EB₉/HRP复合催化剂具有较好的光催化活性和稳定性, 有望成为一种降解污染物的高效而稳定的光催化剂。

关键词: 红磷, 膨润土, 吸附富集-定位光降解, 光催化剂

Abstract:

The hydrothermally treated red phosphorus (HRP) was dispersed on exfoliated bentonite (EB) supporter to prepare the EB/HRP photocatalyst for improving photocatalytic performance. The as-synthesized samples were characterized by different methods. Rhodamine B was selected as the model pollutant to evaluate the photodegradation property of EB/HRP. Results showed that the photodegradation efficiency of the EB/HRP photocatalyst composite increased with increased EB mass fraction, and decreased after reaching the highest value. When the mass fraction of EB was 9%, the EB₉/HRP photocatalyst composite exhibited the maximum adsorption performance and photodegradation activity. Its degradation rate constant k was 0.0641 min^-1, which was two times that of HRP. In addition, after five cycles of photodegradation experiments, EB₉/HRP still had high photocatalytic activity (96.8%). Therefore, the EB₉/HRP catalyst composite had good photocatalytic activity and stability, which can be an efficient and stable photocatalyst for the degradation of pollutants.

Key words: red phosphorus, bentonite, adsorption enrichment-localized photodegradation, photocatalyst

中图分类号:

O643

朱恩权,马玉花,艾尼瓦·木尼热,粟智. 膨润土负载红磷复合材料的吸附富集-定位光降解性能[J]. 无机材料学报, 2020, 35(7): 803-808.

ZHU Enquan,MA Yuhua,AINIWA· Munire,SU Zhi. Adsorption-enrichment and Localized-photodegradation of Bentonite-supported Red Phosphorus Composites[J]. Journal of Inorganic Materials, 2020, 35(7): 803-808.

图/表 5

图1 EB、HRP和EB9/HRP的XRD图谱(a)和FT-IR图谱(b)

Fig. 1 XRD patterns (a) and FT-IR spectra (b) of EB, HRP and EB9/HRP

图2 HRP(a,b)和EB9/HRP(c,d)的SEM照片

Fig. 2 SEM images of (a, b) HRP and (c, d) EB9/HRP

图3 HRP和EB/HRP光催化剂对RhB的降解曲线(a)和反应动力学曲线(b); RhB在催化剂EB9/HRP作用下的紫外-可见光谱变化图(c); HRP和EB9/HRP光催化剂对4-NP的降解曲线(d)

Fig. 3 (a) Photocatalytic degradation of RhB by HRP and EB/HRP; (b) Reaction kinetics of RhB by HRP and EB/HRP; (c) UV-visible spectral changes of RhB over the EB9/HRP; (d) Photocatalytic degradation of p-nitrophenol by HRP and EB9/HRP

图4 HRP和EB9/HRP的瞬态光电流曲线(a)和电化学阻抗图(b)

Fig. 4 (a) Photocurrent responses and (b) electrochemical impedance spectra of HRP and EB9/HRP

图5 (a)不同捕获剂对EB9/HRP降解RhB的影响和(b)EB9/HRP催化剂的循环实验图

Fig. 5 (a) Effect of different radical scavengers on the degradation efficiency of RhB for EB9/HRP, and (b) cycling photocatalytic activity of EB9/HRP BQ: Benzoquinone; TBA: Tert-butyl alcohol; TEOA: Triethanolamine

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膨润土负载红磷复合材料的吸附富集-定位光降解性能

Adsorption-enrichment and Localized-photodegradation of Bentonite-supported Red Phosphorus Composites

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