Huang Bin, Liu Wei, Chao Kun, Wang Dongran, Wang Pengxiang, Xie Tengfeng, Han Fangming, Mi Yan, Tang Haibin, Meng Guowen
Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Minzu University Nanning 530006 P. R. China
Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences 350 Shushanhu Road Hefei Anhui 230031 P. R. China
RSC Adv. 2025 Mar 20;15(11):8657-8662. doi: 10.1039/d5ra00782h. eCollection 2025 Mar 17.
Photocatalytic reduction of nitrate is a promising green strategy to remove nitrogen pollutants from water bodies. However, it is a considerable challenge to directly reduce nitrate using photogenerated electrons. In this work, a g-CN/Ag-nanoparticle composite demonstrating high catalytic activity toward nitrate is constructed using an photodeposition method. Based on photoelectrochemical, ion chromatography and nuclear magnetic resonance characterization, Ag nanoparticles were found to exhibit strong surface catalytic activity for reducing NO to NO , while g-CN/Au-nanoparticles exhibited no photocatalytic reduction activity toward NO . Additionally, the effects of dissolved oxygen on the photocatalysis system of nitrate reduction are analyzed for the first time.
光催化还原硝酸盐是一种从水体中去除氮污染物的很有前景的绿色策略。然而，利用光生电子直接还原硝酸盐是一项颇具挑战的任务。在这项工作中，采用光沉积法构建了一种对硝酸盐具有高催化活性的g-CN/Ag纳米颗粒复合材料。基于光电化学、离子色谱和核磁共振表征，发现Ag纳米颗粒对将NO 还原为NO 表现出很强的表面催化活性，而g-CN/Au纳米颗粒对NO 没有光催化还原活性。此外，首次分析了溶解氧对硝酸盐还原光催化体系的影响。
