Lin Chih-Hsien, Chen Wei-Hsiang
Institute of Environmental Engineering, National Sun Yat-sen University, Kaohsiung 804, Taiwan.
Aerosol Science and Research Center, National Sun Yat-sen University, Kaohsiung 804, Taiwan.
Nanomaterials (Basel). 2021 Nov 25;11(12):3195. doi: 10.3390/nano11123195.
Given the industrial revolutions and resource scarcity, the development of green technologies which aims to conserve resources and reduce the negative impacts of technology on the environment has become a critical issue of concern. One example is heterogeneous photocatalytic degradation. Titanium dioxide (TiO) has been intensively researched given its low toxicity and photocatalytic effects under ultraviolet (UV) light irradiation. The advantages conferred by the physical and electrochemical properties of graphene family nanomaterials (GFN) have contributed to the combination of GFN and TiO as well as the current variety of GFN-TiO catalysts that have exhibited improved characteristics such as greater electron transfer and narrower bandgaps for more potential applications, including those under visible light irradiation. In this review, points of view on the intrinsic properties of TiO, GFNs (pristine graphene, graphene oxide (GO), reduced GO, and graphene quantum dots (GQDs)), and GFN-TiO are presented. This review also explains practical synthesis techniques along with perspective characteristics of these TiO- and/or graphene-based materials. The enhancement of the photocatalytic activity by using GFN-TiO and its improved photocatalytic reactions for the treatment of organic, inorganic, and biological pollutants in water and air phases are reported. It is expected that this review can provide insights into the key to optimizing the photocatalytic activity of GFN-TiO and possible directions for future development in these fields.
鉴于工业革命和资源稀缺，旨在节约资源并减少技术对环境负面影响的绿色技术的发展已成为一个备受关注的关键问题。一个例子是多相光催化降解。二氧化钛（TiO）因其低毒性以及在紫外（UV）光照射下的光催化作用而受到广泛研究。石墨烯家族纳米材料（GFN）的物理和电化学性质所赋予的优势促成了GFN与TiO的结合，以及目前各种GFN-TiO催化剂，这些催化剂展现出了诸如更大的电子转移和更窄的带隙等改进特性，从而具有更多潜在应用，包括在可见光照射下的应用。在这篇综述中，阐述了关于TiO、GFN（原始石墨烯、氧化石墨烯（GO）、还原氧化石墨烯和石墨烯量子点（GQDs））以及GFN-TiO固有性质的观点。这篇综述还解释了这些基于TiO和/或石墨烯材料的实际合成技术以及相关特性。报道了使用GFN-TiO提高光催化活性及其在处理水相和气相中的有机、无机和生物污染物方面改进的光催化反应。预计这篇综述能够为优化GFN-TiO光催化活性的关键以及这些领域未来的可能发展方向提供见解。
