Indium-modified Ga₂O₃ hierarchical nanosheets as efficient photocatalysts for the degradation of perfluorooctanoic acid

Abstract

<p>Indium-modified Ga₂O₃ hierarchical nanosheet was proved to be an efficient and promising photocatalyst for the removal of perfluorooctanoic acid in aqueous environment.</p>

Light-Induced Advanced Oxidation Processes as PFAS Remediation Methods: A Review

“…Nevertheless, the mechanism involved in all the nanostructures remained same where photoinduced electrons were used for the decarbonization of PFOA followed by HF elimination. To improve photocatalytic activity towards PFOA degradation, Huang and coworkers [77] modified Ga 2 O 3 hierarchical nanosheets by doping a series of transition metals (Mn, Co, Zn, Cu, Ti, and In). Indium doping in the Ga 2 O 3 hierarchical composite resulted best, completely degrading PFOA within 1 h with degradation kinetics~7.8 times higher than those of pristine Ga 2 O 3 (Figure 3a).…”

“…Figure 3. (a) Effect of transition metal doping in Ga2O3 hierarchical composites on PFOA degradation (reprinted from[77], copyright (2020) with permission from RSC Publishing). Photogenerated charge separation across the heterojunction of a (b) In2O3/Ce2O3 (reprinted from[82], copyright (2016) with permission from RSC Publishing) and (c) In2O3/MnOx composite (reprinted from[83], copyright (2019) with permission from John Wiley and Sons).…”

Occurrence and removal of poly/perfluoroalkyl substances (PFAS) in municipal and industrial wastewater treatment plants

“…During heterogeneous photocatalysis, the pollutant and catalyst occur in various stages and the process can be defined as absorbing hv and then producing electrons (e À ) and positively charged electron hole pairs (h þ ), which can migrate to the photocatalysts' surface and react directly or indirectly with pollutants (Suri et al 1993;Crittenden et al 1997;Suri et al 1999). It has been demonstrated that heterogeneous photocatalysts such as gallium oxide (Ga 2 O 3 ) and indium trioxide (In 2 O 3 ) are much more effective for the degradation of PFAS compared to direct photolysis (Chen et al 2011;Li et al 2012Li et al , 2013Li et al , 2014Tan et al 2020;Xu et al 2020). However, light penetration and separation or immobilization of catalysts on support materials is limiting the application of this technology (Thiruvenkatachari et al 2008).…”

Indium Oxides and Related Indium‐based Photocatalysts for Water Treatment: Materials Studied, Photocatalytic Performance, and Special Highlights

“…Recent examples are high surface area In 2 O 3 nanosheets [138] and In-doped Ga 2 O 3 with enhanced targeted PFOA adsorption properties. [139] Given the acceptance of their superior performance, future direction of research on these indium-based photocatalytic materials may be on their application in photocatalytic technologies to decontaminate real wastewater streams. [134,136] In summary, it is envisaged that heterogeneous photocatalysis utilizing In-based photocatalytic materials can play an important role in water remediation.…”