Chen Long, Ou Kai, Fan Zhaosen, Liu Lingyu, Cai Fanggong, Xia Yudong, Wang Hongyan
School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, Sichuan, China.
Key Laboratory of Materials and Surface Technology (Ministry of Education), School of Materials Science and Engineering, Xihua University, Chengdu 610039, Sichuan, China.
ACS Omega. 2024 Nov 28;9(50):49163-49171. doi: 10.1021/acsomega.4c05603. eCollection 2024 Dec 17.
Photocatalysts composed of ZnSe nanorods were prepared by using a glancing angle deposition technique facilitated by electron beam evaporation equipment. To enhance the photocatalytic efficiency of ZnSe, a vulcanization process was introduced. The impact of various parameters, including curing temperature, duration, and nanorod length, on the photocatalytic performance was systematically examined. Comprehensive analysis using X-ray diffraction, scanning electron microscopy, and photocurrent density-potential curves identified optimal vulcanization conditions at 300 °C for 45 min for 170 nm ZnSe nanorods. Under these conditions, the photocurrent reached 44.53 μA/cm, approximately 7-fold greater than that of untreated ZnSe nanorods. Furthermore, the degradation efficiency of Rhodamine B increased by 50%. Detailed analysis of the photocatalytic mechanism revealed that sulfurization not only enhances light absorption but also facilitates the separation of photogenerated carriers through the formation of ZnS.
采用电子束蒸发设备辅助的掠角沉积技术制备了由ZnSe纳米棒组成的光催化剂。为了提高ZnSe的光催化效率，引入了硫化过程。系统地研究了包括固化温度、持续时间和纳米棒长度在内的各种参数对光催化性能的影响。使用X射线衍射、扫描电子显微镜和光电流密度-电势曲线进行的综合分析确定了170nm ZnSe纳米棒在300℃下硫化45分钟的最佳硫化条件。在这些条件下，光电流达到44.53μA/cm，约为未处理ZnSe纳米棒的7倍。此外，罗丹明B的降解效率提高了50%。对光催化机理的详细分析表明，硫化不仅增强了光吸收，还通过形成ZnS促进了光生载流子的分离。
