School of Science, Edith Cowan University, WA 6027, Australia.
College of Materials Science and Engineering, Nanjing Forestry University, 210037 Nanjing, China.
J Colloid Interface Sci. 2023 Feb 15;632(Pt A):117-128. doi: 10.1016/j.jcis.2022.11.047. Epub 2022 Nov 15.
Increasing water pollution has imposed great threats to public health, and made efficient monitoring and remediation technologies critical to a clean environment. In this study, a versatile heterojunction of Au nanoparticles modified phosphorus doped carbon nitride (Au/P-CN) is designed and fabricated. The Au/P-CN heterostructure demonstrates improved light absorption, rapid separation of charge carriers, and improved electrical conductivity. Taking the toxic 4-chlorophenol (4-CP) as an example, an ultrasensitive photoelectrochemical (PEC) sensor is successfully demonstrated, exhibiting a wide linear range (0.1-52.1 μM), low detection limit (∼0.02 μM), significant stability and selectivity, as well as reliable analysis in real samples. Moreover, efficient photocatalytic degradation with a high removing efficiency (∼87%) toward 4-CP is also achieved, outperforming its counterpart of Au nanoparticles (NPs) modified graphitic carbon nitride (Au/g-CN, ∼59%). This work paves a new way for efficient and simultaneous detection and remediation of organic pollutants over versatile photoactive catalysts.
水污染的加剧对公众健康造成了巨大威胁，因此，高效的监测和修复技术对于清洁环境至关重要。在本研究中，设计并制备了一种多功能的 Au 纳米粒子修饰磷掺杂碳氮化物（Au/P-CN）异质结。Au/P-CN 异质结构表现出了增强的光吸收、载流子快速分离以及提高的电导率。以有毒的 4-氯苯酚（4-CP）为例，成功地展示了一种超灵敏的光电化学（PEC）传感器，其具有宽线性范围（0.1-52.1 μM）、低检测限（约 0.02 μM）、显著的稳定性和选择性，以及在实际样品中的可靠分析。此外，还实现了高效的光催化降解，对 4-CP 的去除效率高达 87%，优于其对照物 Au 纳米粒子（NPs）修饰的石墨相氮化碳（Au/g-CN，约 59%）。这项工作为在多功能光活性催化剂上实现有机污染物的高效、同时检测和修复开辟了新途径。
