Recent progress in NO_xphotocatalytic removal

Surface/interface engineering and mechanistic understanding

authored by

Baker Rhimi, Mohsen Padervand, Houda Jouini, Shahnaz Ghasemi, Detlef W. Bahnemann, Chuanyi Wang

Abstract

Due to the increased emission of nitrogen oxides (NOx) from flue gas and its high polluting effects on human health and the ecosystem, much attention is directed toward NOx monitoring, removal, and control. This work reviews the latest progress in NOx photocatalytic removal emphasizing the advancements in surface/interface engineering of photocatalytic materials considering the reaction mechanism and modifications for controlling the generation of the toxic intermediate. Defect chemistry, facet controlling, and stability of the photocatalytic systems are comprehensively discussed. The challenges/bottlenecks of the practical applications are also highlighted at the end. Indeed, the photocatalytic removal of NOx is still a significant challenge due to the remaining limitations. Herein, state of the art in utilizing the widely-used semiconducting materials such as TiO2 and g-C3N4-based photocatalysts are summarized, focusing on the eminent strategies to amend their performances under visible light. Also, we briefly survey the utilization of MOFs for NOx photoreduction, highlighting the unlikeness of such materials concerning the coincidence of the organic linkers as light sensitizers and the metallic nodes to intensify the transfer of photoinduced electrons. In addition to the concerns mentioned above in this review, so far, no serious consideration has been paid to the control of toxic by-products and intermediate species generation through NOx removal methodologies. Eventually, this report has been concluded with a summary and some perspectives on the advanced pathways to develop novel efficient nanomaterials for the removal of NOx hazards from the environment.

Organisation(s)

Institute of Technical Chemistry

External Organisation(s)

Shaanxi University of Science and Technology
University of Maragheh
University of Tunis El-Manar
Sharif University of Technology
Saint Petersburg State University

Type

Article

Journal

Journal of Environmental Chemical Engineering

Volume

10

Publication date

12.2022

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Chemical Engineering (miscellaneous), Waste Management and Disposal, Pollution, Process Chemistry and Technology

Sustainable Development Goals

SDG 3 - Good Health and Well-being

Electronic version(s)

https://doi.org/10.1016/j.jece.2022.108566 (Access: Closed)