Wang Zhuliang, Fan Yiping, Wu Rong, Huo Yaoxing, Wu Hao, Wang Fang, Xu Xiaohong
School of Chemistry and Materials Science of Shanxi Normal University, Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education Linfen 041004 China
Research Institute of Materials Science of Shanxi Normal University, Collaborative Innovation Center for Shanxi Advanced Permanent Magnetic Materials and Techonology Linfen 041004 China.
RSC Adv. 2018 Jan 30;8(10):5180-5188. doi: 10.1039/c7ra13291c. eCollection 2018 Jan 29.
A novel magnetic heterogeneous g-CN/α-FeO/FeO catalyst was successfully synthesized through a simple hydrothermal method. The structure, morphology, and optical properties of the catalyst were characterized. The photocatalytic activity of the heterogeneous g-CN/α-FeO/FeO catalyst for the photo-Fenton degradation of Orange II in the presence of HO irradiated with visible light ( > 420 nm) at neutral pH was evaluated. The g-CN/α-FeO/FeO photocatalyst was found to be an excellent catalyst for the degradation of Orange II and offers great advantages over the traditional Fenton system (Fe(ii/iii)/HO). The results indicated that successfully combining monodispersed FeO nanoparticles and g-CN/α-FeO enhanced light harvesting, retarded photogenerated electron-hole recombination, and significantly enhanced the photocatalytic activity of the system. The g-CN/α-FeO/FeO (30%) sample gave the highest degradation rate constant, 0.091 min, which was almost 4.01 times higher than the degradation rate constant for α-FeO and 2.65 times higher than the degradation rate constant for g-CN/α-FeO under the same conditions. A reasonable mechanism for catalysis by the g-CN/α-FeO/FeO composite was developed. The g-CN/α-FeO/FeO composite was found to be stable and recyclable, meaning it has great potential for use as a photo-Fenton catalyst for effectively degrading organic pollutants in wastewater.
通过一种简单的水热法成功合成了一种新型磁性非均相g-CN/α-FeO/FeO催化剂。对该催化剂的结构、形貌和光学性质进行了表征。评估了非均相g-CN/α-FeO/FeO催化剂在中性pH值下，可见光（>420 nm）照射且存在HO的条件下对橙黄II进行光芬顿降解的光催化活性。发现g-CN/α-FeO/FeO光催化剂是降解橙黄II的优良催化剂，与传统芬顿体系（Fe(ii/iii)/HO）相比具有很大优势。结果表明，单分散的FeO纳米颗粒与g-CN/α-FeO的成功结合增强了光捕获，抑制了光生电子-空穴复合，并显著提高了该体系的光催化活性。g-CN/α-FeO/FeO（30%）样品的降解速率常数最高，为0.091 min，在相同条件下几乎是α-FeO降解速率常数的4.01倍，是g-CN/α-FeO降解速率常数的2.65倍。提出了g-CN/α-FeO/FeO复合材料催化的合理机理。发现g-CN/α-FeO/FeO复合材料稳定且可回收，这意味着它在用作光芬顿催化剂有效降解废水中有机污染物方面具有巨大潜力。
