• 综合
  • 标题
  • 关键词
  • 摘要
  • 学者
  • 期刊-刊名
  • 期刊-ISSN
  • 会议名称
搜索

作者:

Liu, Yuankun (Liu, Yuankun.) | Zhang, Xinxia (Zhang, Xinxia.) | Li, Xing (Li, Xing.) | Huang, Yeqian (Huang, Yeqian.) | Zhou, Zhiwei (Zhou, Zhiwei.) | Wei, Jia (Wei, Jia.)

收录:

Scopus SCIE

摘要:

Heavy metals and organic dyes, such as Cr(VI) and rhodamine B (RhB), were usually both contained in printing and dyeing wastewater. Despite extensive research on the removal of RhB and Cr(VI) from wastewater, addressing the challenge of simultaneous removal of mixed pollutants remains a significant hurdle. In this paper, a Z-scheme heterojunction, denoted as GQDs/BiOBr/g-C3N4 (GBCN), was prepared from BiOBr and g-C3N4 with graphene quantum dots (GQDs) serving as electron transfer mediators. This composite exhibits a nanosheet morphology with an increased specific surface area of 7.58 m(2)/g. The synergistic effects of the coexistence system resulted in GBCN achieving complete RhB degradation within 100 min and an impressive 99.3 % photoreduction efficiency for Cr(VI). Density functional theory (DFT) calculations and experimental results suggested that the superior photocatalytic performance of GBCN was attributed to the highly efficient electron transfer and charge separation enabled by the Z-scheme heterojunction, in synergy with the electron transfer mediator and the photothermal effect. Quenching experiments and electron spin resonance (ESR) measurements validated the involvement of h(+), center dot O-2(-), center dot OH, and O-1(2) in the oxidation of RhB, while e(-) contributed to the reduction of Cr(VI). Fukui index calculations revealed high f(0) values for N2, N14, O23, and C23 of RhB molecules and the degradation intermediates of RhB were further identified by LC-MS analysis. Finally, the reduced toxicity of the product after RhB degradation was affirmed. This study offers new insights into the design of efficient Z-scheme heterojunctions for the simultaneous removal of organic dyes and heavy metal ions.

关键词:

Cr(VI) photoreduction RhB photodegradation Photothermal effect Z-scheme heterojunction Synergistic removal mechanism

作者机构:

  • [ 1 ] [Liu, Yuankun]Beijing Univ Technol, Coll Civil Engn & Architecture, Municipal Engn Dept, Beijing 100124, Peoples R China
  • [ 2 ] [Zhang, Xinxia]Beijing Univ Technol, Coll Civil Engn & Architecture, Municipal Engn Dept, Beijing 100124, Peoples R China
  • [ 3 ] [Li, Xing]Beijing Univ Technol, Coll Civil Engn & Architecture, Municipal Engn Dept, Beijing 100124, Peoples R China
  • [ 4 ] [Zhou, Zhiwei]Beijing Univ Technol, Coll Civil Engn & Architecture, Municipal Engn Dept, Beijing 100124, Peoples R China
  • [ 5 ] [Wei, Jia]Beijing Univ Technol, Coll Civil Engn & Architecture, Municipal Engn Dept, Beijing 100124, Peoples R China
  • [ 6 ] [Huang, Yeqian]SINOPEC Oil Field Explorat & Dev Div, Beijing 100728, Peoples R China

通讯作者信息:

  • [Liu, Yuankun]Beijing Univ Technol, Coll Civil Engn & Architecture, Municipal Engn Dept, Beijing 100124, Peoples R China;;

电子邮件地址:

查看成果更多字段

相关关键词:

来源 :

JOURNAL OF WATER PROCESS ENGINEERING

ISSN: 2214-7144

年份: 2024

卷: 66

7 . 0 0 0

JCR@2022

被引次数:

WoS核心集被引频次:

SCOPUS被引频次: 2

ESI高被引论文在榜: 0 展开所有

万方被引频次:

中文被引频次:

近30日浏览量: 0

归属院系:

在线人数/总访问数:396/4968467
地址:北京工业大学图书馆(北京市朝阳区平乐园100号 邮编:100124) 联系我们:010-67392185
版权所有:北京工业大学图书馆 站点建设与维护:北京爱琴海乐之技术有限公司