Recent progress on plant extract-mediated biosynthesis of ZnO-based nanocatalysts for environmental remediation: Challenges and future outlooks

Osman Ahmed Zelekew; Haileyesus Hatano Haitosa; Xiaoyun Chen; Yi-Nan Wu

doi:10.1016/j.cis.2023.102931

Recent progress on plant extract-mediated biosynthesis of ZnO-based nanocatalysts for environmental remediation: Challenges and future outlooks

Adv Colloid Interface Sci. 2023 Jul:317:102931. doi: 10.1016/j.cis.2023.102931. Epub 2023 May 25.

Authors

Osman Ahmed Zelekew¹, Haileyesus Hatano Haitosa², Xiaoyun Chen³, Yi-Nan Wu⁴

Affiliations

¹ College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Rd., Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, 1239 Siping Rd., Shanghai 200092, China; Department of Materials Science and Engineering, Adama Science and Technology University, Adama, Ethiopia.
² Department of Materials Science and Engineering, Adama Science and Technology University, Adama, Ethiopia.
³ College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
⁴ College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Rd., Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, 1239 Siping Rd., Shanghai 200092, China. Electronic address: 51n@tongji.edu.cn.

PMID: 37267679
DOI: 10.1016/j.cis.2023.102931

Abstract

The plant extract mediated green synthesis of nanomaterials has attracts enormous interest due to its cost-effectiveness, greener, and environmentally friendly. It is also considered as an alternative and facile method in which the phytochemicals can be used as a natural capping and reducing agents and helped to produce nanomaterials with high surface area, different sizes, and shapes. One of the materials fabricated using green methods is zinc oxide (ZnO) semiconductor due to its enormous applications in different field areas. In this review, an overview of recent progress on green synthesized ZnO-based catalysts and various modification methods for the purpose of enhancing the catalytic activity of ZnO and the corresponding structural-activity and interactions towards the removal of pollutants are highlighted. Particularly, the plant extract mediated ZnO-based photocatalysts application for the removal of pollutants via photocatalytic degradation, reduction reaction, and adsorption mechanism are demonstrated. Besides, the opportunities, challenges, and future outlooks of ZnO-based materials for environmental remediation with green and sustainable methods are also included. We believe that this review is a timely and comprehensive review on the recent progress related to plant extract mediated ZnO-based nanocatalysts synthesis and applications for environmental remediation.

Keywords: Green synthesis; Nanomaterials; Organic pollutants; Photocatalyst; Wastewater treatment; ZnO.

Publication types

Review