Hasan Jaafar, Wang Jing, Wang Zhentao, Idrees Muhammad, Batool Saima, Zhang Caiwei, Qin Chuanguang
Shaanxi Key Laboratory of Polymer Science and Technology, Ministry of Education Key Laboratory of Supernormal Material Physics and Chemistry, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, 710129, People's Republic of China.
College of Dentistry, AL-Muthanna University, AL-Muthanna Province, Samawah, Iraq.
Environ Sci Pollut Res Int. 2022 Feb;29(8):12222-12236. doi: 10.1007/s11356-021-16605-4. Epub 2021 Sep 25.
The reduced graphene oxide dopped equaixial geometry TiO (rGO/egTiO) composite as photocatalyst was synthesized hydrothermally with various mass ratios of tetrabutyl titanate. The photocatalyst is considered to be rGO/equaixial geometry TiO in terms of modifying the combined reduced graphene Oxide and TiO. The rGO plays a vital role in rGO/egTiO composite as photocatalysts were analyzed in methylene blue (MB) and rhodamine B (RhB) photocatalytic degradation under UV and simulated solar light irradiation. This synthesized catalyst was characterized by various analytical techniques such as XPS, XRD, SEM, BET, and TEM. The rGO/egTiO composite exhibits enhanced photocatalytic performance with degradation rates of 97.5 and 97% on RhB and MB for 60 min under UV radiation respectively, while the degradation rate of 94 and 92 % was observed on the same dyes for 6 h under the simulated sunlight radiation. The enhanced photocatalytic performance of the rGO/egTiO composite under ultraviolet irradiation source was owing to a high separation efficiency of the photo-induced electron-hole pairs, while the photocatalytic performance under simulated sunlight radiation was due to the photosensitive and charge separator behavior of rGO. This offers us an excellent potential of significant photocatalytic activity for the removal of organic contaminants from wastewater.
采用水热法,以不同质量比的钛酸四丁酯合成了作为光催化剂的还原氧化石墨烯掺杂等轴几何结构TiO(rGO/egTiO)复合材料。就改性还原氧化石墨烯与TiO的结合而言,该光催化剂被认为是rGO/等轴几何结构TiO。在紫外光和模拟太阳光照射下,对亚甲基蓝(MB)和罗丹明B(RhB)进行光催化降解分析时,rGO在rGO/egTiO复合材料作为光催化剂中起着至关重要的作用。通过XPS、XRD、SEM、BET和TEM等多种分析技术对合成的这种催化剂进行了表征。rGO/egTiO复合材料表现出增强的光催化性能,在紫外辐射下,60分钟内对RhB和MB的降解率分别为97.5%和97%,而在模拟太阳光辐射下,6小时内对相同染料的降解率分别为94%和92%。rGO/egTiO复合材料在紫外辐射源下增强的光催化性能归因于光生电子 - 空穴对的高分离效率,而在模拟太阳光辐射下的光催化性能则归因于rGO的光敏和电荷分离行为。这为我们从废水中去除有机污染物提供了具有显著光催化活性的优异潜力。