Abstract：
Perfluorooctanoic acid (PFOA) is a toxic and recalcitrant perfluoroalkyl substance commonly detected in the environment. Its low concentration challenges the development of effective degradation techniques, which demands intensive chemical and energy consumption. The recent stringent health advisories and the upgrowth and advances in photocatalytic technologies claim the need to evaluate and compare the state-of-the-art. Among these systems, chemical-free photocatalysis emerges as a cost-effective and sustainable solution for PFOA degradation and potentially other perfluorinated carboxylic acids. This review (I) classifies the state-of-the-art of chemical-free photocatalysts for PFOA degradation in families of materials (Ti, Fe, In, Ga, Bi, Si, and BN), (II) describes the evolution of catalysts, identifies and discusses the strategies to enhance their performance, (III) proposes a simplified cost evaluation tool for simple techno-economical analysis of the materials; (IV) compares the features of the catalysts expanding the classic degradation focus to other essential parameters, and (V) identifies current research gaps and future research opportunities to enhance the photocatalyst performance. We aim that this critical review will assist researchers and practitioners to develop rational photocatalyst designs and identify research gaps for green and effective PFAS degradation.
摘要：
全氟辛酸(PFOA)是通常在环境中检测到的有毒且难降解的全氟烷基物质。其低浓度对有效降解技术的发展提出了挑战，这需要大量的化学和能源消耗。最近严格的健康咨询以及光催化技术的发展和进步声称需要评估和比较最新技术。在这些系统中，无化学物质的光催化技术成为PFOA降解和潜在的其他全氟化羧酸的经济有效和可持续的解决方案。这篇综述（I）对材料家族中PFOA降解的无化学光催化剂的最新技术进行了分类（Ti，Fe,In,Ga,Bi,Si,和BN)，(二)描述了催化剂的演变，确定并讨论提高其绩效的策略，（III）提出了一种简化的成本评估工具，用于对材料进行简单的技术经济分析；（IV）比较了催化剂的特征，将经典的降解重点扩展到其他基本参数，和（V）确定当前的研究空白和未来的研究机会，以提高光催化剂的性能。我们的目标是，这一关键审查将帮助研究人员和从业人员开发合理的光催化剂设计，并确定绿色和有效的PFAS降解的研究差距。
