Performance and mechanism of synergistic removals of Cr(Ⅵ) and phenol from aqueous media by rGO/TNTs composite photocatalyst

doi:10.11894/iwt.2019-0166

Industrial Water Treatment ›› 2019, Vol. 39 ›› Issue (10): 32-36. doi: 10.11894/iwt.2019-0166

• Research and Experiment • Previous Articles Next Articles

Performance and mechanism of synergistic removals of Cr(Ⅵ) and phenol from aqueous media by rGO/TNTs composite photocatalyst

Hongyan Li^1,²(),Yujian Li^1,²,Jianguo Cui^1,²,Fang Wang³,Chao Li⁴,Shangming Li^5,*()

1. College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2. Innovation Center for Postgraduate Education in Municipal Engineering of Shanxi Province, Jinzhong 030600, China
3. Research Center for Edible Fungi, Biological Institute of Shanxi Province, Taiyuan 030006, China
4. The First Design Department, Shouan Industrial Fire Company, Beijing 101304, China
5. College of Material Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Received:2019-06-26 Online:2019-10-20 Published:2019-10-29
Contact: Shangming Li E-mail:lhy3162@126.com;shangming_li@sina.com
Supported by:
山西省重点研发计划项目(社会发展领域)(201803D31046);山西省研究生联合培养基地人才培养项目(2018JD19);山西省重点研发计划项目(农业领域)(201703D211013)

rGO/TNTs光催化剂协同降解水中Cr（Ⅵ）与苯酚的性能

李红艳^1,²(),李玉鉴^1,²,崔建国^1,²,王芳³,李超⁴,李尚明^5,*()

1. 太原理工大学环境科学与工程学院, 山西太原 030024
2. 山西省市政工程研究生教育创新中心, 山西晋中 030600
3. 山西省生物研究所食用菌研究中心, 山西太原 030006
4. 首安工业消防有限公司第一设计部, 北京 101304
5. 太原理工大学材料科学与工程学院, 山西太原 030024

通讯作者: 李尚明 E-mail:lhy3162@126.com;shangming_li@sina.com
作者简介:李红艳(1975-),博士研究生,副教授/硕导。电话:13934158627, E-mail:lhy3162@126.com
基金资助:
山西省重点研发计划项目(社会发展领域)(201803D31046);山西省研究生联合培养基地人才培养项目(2018JD19);山西省重点研发计划项目(农业领域)(201703D211013)

Abstract

Abstract:

In this study, a novel reduced graphene oxide/titanium dioxide nanotube composite material(rGO/TNTs) was successfully synthesized by the combination of GO and TNTs through hydrothermal reaction. Then the prepared samples of rGO/TNTs were characterized by BET, XRD, and FT-IR, respectively. Finally, the prepared nanotubes were applied to degrade the Cr(Ⅵ) and phenol from water synergistically. The enhanced photocatalytic removals of coexistent Cr(Ⅵ) and phenol by rGO/TNTs were observed in binary systems, and their kinetic constants were about 6.3 and 1.2 times those in the respective single systems. The low pH were found to improve the removals of Cr(Ⅵ) and phenol, while the coexisting inorganic anions had negative effects. In addition, hydroxyl radical and holes were proved to dominate the phenol degradation, whereas photogenerated electrons directly reduced the Cr(Ⅵ).

Key words: rGO/TiO₂ nanotubes, Cr(Ⅵ) reduction, phenol oxidation, active species

摘要：

采用水热法将GO和TNTs复合，制备了一种新型还原氧化石墨烯/二氧化钛纳米管复合材料（rGO/TNTs）。采用BET、XRD、FT-IR对制备的材料进行了表征，并研究了rGO/TNTs协同降解水中Cr（Ⅵ）和苯酚的性能。结果表明，在Cr（Ⅵ）和苯酚共存二元体系中，rGO/TNTs对Cr（Ⅵ）和苯酚的光催化降解反应动力学常数约为其各自单体系的6.3倍和1.2倍；低pH可促进Cr（Ⅵ）和苯酚的去除，而共存无机阴离子对其具有抑制作用。·OH和空穴主导苯酚降解，光生电子直接还原Cr（Ⅵ）。

关键词: rGO/TNTs, Cr(Ⅵ)还原, 苯酚氧化, 活性物种

CLC Number:

X703

Hongyan Li, Yujian Li, Jianguo Cui, Fang Wang, Chao Li, Shangming Li. Performance and mechanism of synergistic removals of Cr(Ⅵ) and phenol from aqueous media by rGO/TNTs composite photocatalyst[J]. Industrial Water Treatment, 2019, 39(10): 32-36.

李红艳, 李玉鉴, 崔建国, 王芳, 李超, 李尚明. rGO/TNTs光催化剂协同降解水中Cr（Ⅵ）与苯酚的性能[J]. 工业水处理, 2019, 39(10): 32-36.

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https://www.iwt.cn/EN/Y2019/V39/I10/32

Figures/Tables 7

References 11

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