National Institute of Technology (Alumnus), Tiruchirappalli, 620 015, Tamil Nadu, India.
Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha Nagar, Thandalam, Chennai - 602 105, Tamil Nadu, India.
Environ Pollut. 2022 Aug 1;306:119377. doi: 10.1016/j.envpol.2022.119377. Epub 2022 Apr 28.
Graphene oxide can be used to store energy, as electrodes and purify industrial and domestic wastewater as photocatalysts and adsorbents because of its remarkable thermal, electrical, and chemical capabilities. Toward understanding graphene oxide (GO) based nanomaterials considering the background factors, the present review study investigated their characteristics, preparation methods, and characterization processes. The removal of contaminants from wastewater has recently been a focus of attention for materials based on GO. Progress in GO synthesis and surface modification has shown that they can be used to immobilize enzymes. It is possible to immobilize enzymes with varying characteristics on graphene-oxide-based substrates without sacrificing their functioning, thus developing a new environmental remediation platform utilizing nano biocatalysts. GO doping and co-doping with a variety of heterogeneous semiconductor-based metal oxides were included in a brief strategy for boosting GO efficiency. A high band-gap material was also explored as a possibility for immobilization, which shifts the absorption threshold to the visible range and increases photoactivity. For water treatment applications, graphene-based nanomaterials were used in Fenton reactions, photocatalysis, ozonation, photo electrocatalysis, photo-Fenton, and a combination of photon-Fenton and photocatalysis. Nanoparticles made from GO improved the efficiency of composite materials when used for their intended applications. As a result of the analysis, prospects and improvements are clear, especially when it comes to scaling up GO-based wastewater treatment technologies.
氧化石墨烯由于其显著的热、电和化学性能，可作为电极用于储能，作为光催化剂和吸附剂用于净化工业和生活污水。为了了解基于氧化石墨烯（GO）的纳米材料，考虑到背景因素，本综述研究调查了它们的特性、制备方法和表征过程。最近，基于 GO 的材料对去除废水中污染物的研究引起了人们的关注。GO 合成和表面改性的进展表明，它们可用于固定酶。可以在不牺牲其功能的情况下，将具有不同特性的酶固定在基于氧化石墨烯的基底上，从而开发出利用纳米生物催化剂的新型环境修复平台。简要探讨了通过掺杂和共掺杂各种异质半导体基金属氧化物来提高 GO 效率的策略。还研究了一种高带隙材料作为固定化的可能性，这将吸收阈值转移到可见光范围并提高光活性。在水处理应用中，基于石墨烯的纳米材料被用于芬顿反应、光催化、臭氧氧化、光电催化、光芬顿和光芬顿与光催化的结合。GO 纳米粒子用于复合材料时提高了其应用效率。通过分析，前景和改进方向是明确的，特别是在扩大基于 GO 的废水处理技术方面。
