Controlling the Gas–Water Interface to Enhance Photocatalytic Degradation of Volatile Organic Compounds

  • Zhenmin Xu
    Zhenmin Xu
    The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Function Materials, Shanghai Normal University, Shanghai 200234, P. R. China
    Research Center of Nano Science and Technology, Shanghai University, Shanghai 200444, P. R. China
    More by Zhenmin Xu
  • Wei Chai
    Wei Chai
    Department of Chemical Engineering, Zaozhuang Vocational College, Shandong 277800, P. R. China
    More by Wei Chai
  • Jiazhen Cao
    Jiazhen Cao
    The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Function Materials, Shanghai Normal University, Shanghai 200234, P. R. China
    More by Jiazhen Cao
  • Fengjiao Huang
    Fengjiao Huang
    The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Function Materials, Shanghai Normal University, Shanghai 200234, P. R. China
  • Tong Tong
    Tong Tong
    The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Function Materials, Shanghai Normal University, Shanghai 200234, P. R. China
    More by Tong Tong
  • Suyuan Dong
    Suyuan Dong
    The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Function Materials, Shanghai Normal University, Shanghai 200234, P. R. China
    More by Suyuan Dong
  • Qianyu Qiao
    Qianyu Qiao
    The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Function Materials, Shanghai Normal University, Shanghai 200234, P. R. China
    More by Qianyu Qiao
  • Liyi Shi
    Liyi Shi
    Research Center of Nano Science and Technology, Shanghai University, Shanghai 200444, P. R. China
    More by Liyi Shi
  • Hexing Li
    Hexing Li
    The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Function Materials, Shanghai Normal University, Shanghai 200234, P. R. China
    More by Hexing Li
  • Xufang Qian
    Xufang Qian
    School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
    More by Xufang Qian
  • , and 
  • Zhenfeng Bian*
    Zhenfeng Bian
    The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Function Materials, Shanghai Normal University, Shanghai 200234, P. R. China
    *E-mail: [email protected]
Cite this: ACS EST Engg. 2021, 1, 7, 1140–1148
Publication Date (Web):May 11, 2021
https://doi.org/10.1021/acsestengg.1c00120
Copyright © 2021 American Chemical Society
Article Views
593
Altmetric
-
Citations
LEARN ABOUT THESE METRICS
Read OnlinePDF (4 MB)
Supporting Info (1)»

Abstract

The gas–water interface plays an important role in the photocatalytic degradation of volatile organic compounds (VOCs). Herein, a novel photocatalytic reactor with a tunable gas–water interface was designed and utilized to investigate the performance of photocatalytic degradation of VOCs. The relationship between the key operating parameters of the reactor and VOCs mineralization was investigated in detail with toluene as a model pollutant. The results showed that a tunable gas–water interface was formed in the process of atomized spray photocatalytic oxidation. Furthermore, the photocatalyst was easily excited by light, generating more free radicals, which was conducive to improving the mineralization performance of toluene and the durability of the catalyst. The intermediates of the toluene reaction were analyzed by photoacoustic spectroscopy (PAS), total organic carbon (TOC), and electrospray ionization–ion trap mass spectrometry (ESI–MS). The results show that abundant hydroxyl radicals are formed at the gas–water interface, which is beneficial to the opening of the benzene ring and greatly reduces the formation of toxicity and byproducts. Simultaneously, we investigated the degradation performance of acetone, formaldehyde, and n-hexane in the reactor. This provides a new strategy for using photocatalytic technology to purify industrial flue gas and indoor air.

Supporting Information

ARTICLE SECTIONS
Jump To

The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsestengg.1c00120.

  • XRD; N2 adsorption–desorption isotherm; TEM; SEM; CO2 production; n-hexane, formaldehyde, and acetone degradation performance; FTIR; TG-DTA; ESI–MS; and the corresponding structure of intermediates (PDF)

Terms & Conditions

Most electronic Supporting Information files are available without a subscription to ACS Web Editions. Such files may be downloaded by article for research use (if there is a public use license linked to the relevant article, that license may permit other uses). Permission may be obtained from ACS for other uses through requests via the RightsLink permission system: http://pubs.acs.org/page/copyright/permissions.html.

Cited By


This article is cited by 1 publications.

  1. Minh-Thuan Pham, Hong-Huy Tran, Truc-Mai T. Nguyen, Dai-Phat Bui, Yu Huang, Junji Cao, Sheng-Jie You, Pham Van Viet, Vu Hoang Nam, Ya-Fen Wang. Revealing DeNOx and DeVOC Reactions via the Study of the Surface and Bandstructure of ZnSn(OH)6 Photocatalysts. Acta Materialia 2021, 136 , 117068. https://doi.org/10.1016/j.actamat.2021.117068