Photocatalytic TiO2-Based Nanostructures as a Promising Material for Diverse Environmental Applications: A Review

Reactions Pub Date : 2024-02-01 DOI:10.3390/reactions5010007
M. Gatou, Athanasia Syrrakou, N. Lagopati, E. Pavlatou
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Abstract

Contemporary technological and industrial advancements have led to increased reliance on chemicals for product innovation, leading to heightened contamination of water sources by traditional pollutants (organic dyes, heavy metals) and disease-causing microorganisms. Wastewater treatment processes now reveal “emerging pollutants”, including pharmaceuticals, endocrine disruptors, and agricultural chemicals. While some are benign, certain emerging pollutants can harm diverse organisms. Researchers seek cost-effective water purification methods that completely degrade pollutants without generating harmful by-products. Semiconductor-based photocatalytic degradation, particularly using titanium dioxide (TiO2), is popular for addressing water pollution. This study focuses on recent applications of TiO2 nanostructures in photocatalysis for eliminating various water pollutants. Structural modifications, like doping and nanocomposite formation, enhance photocatalyst performance. The study emphasizes photocatalytic elimination mechanisms and comprehensively discusses factors impacting both the mechanism and performance of nano-TiO2-based photocatalysts. Characteristics of TiO2, such as crystal structure and energy band-gap, along with its photocatalytic activity mechanism, are presented. The review covers the advantages and limitations of different TiO2 nanostructure production approaches and addresses potential toxicity to human health and the environment. In summary, this review provides a holistic perspective on applying nano-TiO2 materials to mitigate water pollution.
基于 TiO2 的光催化纳米结构是一种可用于多种环境应用的前景广阔的材料:综述
当代技术和工业的进步导致产品创新越来越依赖化学品,从而加剧了传统污染物(有机染料、重金属)和致病微生物对水源的污染。现在,废水处理过程会产生 "新兴污染物",包括药品、内分泌干扰物和农用化学品。虽然有些污染物是无害的,但某些新出现的污染物会对各种生物造成危害。研究人员正在寻求具有成本效益的水净化方法,既能完全降解污染物,又不会产生有害的副产品。基于半导体的光催化降解,特别是使用二氧化钛(TiO2),是解决水污染问题的常用方法。本研究的重点是二氧化钛纳米结构在光催化消除各种水污染物方面的最新应用。结构改性,如掺杂和纳米复合材料的形成,可提高光催化剂的性能。研究强调了光催化消除机制,并全面讨论了影响基于纳米二氧化钛的光催化剂的机制和性能的因素。文中介绍了二氧化钛的晶体结构和能带隙等特性及其光催化活性机理。综述涵盖了不同 TiO2 纳米结构生产方法的优势和局限性,并探讨了其对人类健康和环境的潜在毒性。总之,本综述从整体角度探讨了如何应用纳米二氧化钛材料来减轻水污染。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
2.70
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