二维石墨相氮化碳-氧化锡纳米杂化材料的光催化性能增强。

Enhanced Photocatalytic Degradation Activity of 2-D Graphitic Carbon Nitride-SnO₂ Nanohybrids.

机构信息

Department of Chemistry and Research Institute, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, Tamil Nadu, India.

Key Lab of Advanced Transducers and Intelligent Control System, Ministry of Education and Shanxi Province, College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, P. R. China.

出版信息

J Nanosci Nanotechnol. 2019 Jun 1;19(6):3576-3582. doi: 10.1166/jnn.2019.16033.

DOI:10.1166/jnn.2019.16033

PMID:30744788

Abstract

In this paper, we report on the facile synthesis of graphitic carbon nitride (g-C₃N₄)-tin oxide (SnO₂) nanohybrid as an efficient photocatalyst prepared via sol-gel method. SnO₂ nanoparticles are pointcontacted with g-C₃N₄. The results of physio-chemical characterizations such as SEM-EDAX, XRD, BET, FT-IR and UV-DRS spectra reveal the successful formation and integration of nanohybrid. The photocatalytic activity has been studied by using methylene-blue as a model dye for degradation. It has been observed that the pseudo-first order rate constant was increased up to 1.78 times compared with pure SnO₂. The enhanced photocatalytic activity was ascribed from the inhibition of electron-hole recombination where g-C₃N₄ nanosheets acts as an electron receiver from SnO₂ via point contact. This mechanism is further verified via photoluminescence spectra. Our results prominently show new insights and potential applications of g-C₃N₄-SnO₂ nanohybrids in the waste water treatment and environmental remediation sectors.

摘要

本文报道了一种简便的制备方法，通过溶胶-凝胶法制备了石墨相氮化碳（g-C₃N₄）-氧化锡（SnO₂）纳米杂化材料作为高效光催化剂。SnO₂纳米颗粒与 g-C₃N₄呈点接触。通过 SEM-EDAX、XRD、BET、FT-IR 和 UV-DRS 光谱等物理化学特性的研究结果表明，纳米杂化材料成功地形成和集成。通过使用亚甲基蓝作为降解模型染料来研究光催化活性。与纯 SnO₂相比，观察到假一级速率常数增加了 1.78 倍。增强的光催化活性归因于抑制电子-空穴复合，其中 g-C₃N₄纳米片通过点接触从 SnO₂充当电子受体。该机制通过光致发光光谱进一步得到验证。我们的研究结果突出表明，g-C₃N₄-SnO₂纳米杂化物在废水处理和环境修复领域具有新的见解和潜在应用。