Dao Thi Bang Tam, Ha Thi Thu Loan, Nguyen Trung Do, Le Hon Nhien, Ha-Thuc Chi Nhan, Nguyen Thi Mai Loan, Perre Patrick, Nguyen Dang Mao
Faculty of Materials Science and Technology, University of Science, VNU-HCM, 227 Nguyen Van Cu Street, Ward 4, District 5, Ho Chi Minh City, 700000, Viet Nam; Vietnam National University - Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Viet Nam.
Faculty of Materials Science and Technology, University of Science, VNU-HCM, 227 Nguyen Van Cu Street, Ward 4, District 5, Ho Chi Minh City, 700000, Viet Nam; Vietnam National University - Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Viet Nam.
Chemosphere. 2021 Oct;280:130802. doi: 10.1016/j.chemosphere.2021.130802. Epub 2021 May 5.
The aim of this paper is to synthesize montmorillonite/TiO-nanoparticles (MMT/TiO and montmorillonite/TiO-nanotubes (MMT/TiO) photocatalysts through a simple wet agitation method based on TiO nanoparticles and MMT. They are likely to accumulate the effect of adsorption and photodegradation. Then, the photocatalysts are applied to degrade the rhodamine B in dye effluents. The structural characterizations of photocatalysts are investigated using transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and energy-dispersive X-ray spectroscopy (EDX). The photocatalytic activities and effectiveness of photocatalysts are evaluated through rhodamine B degradation at different concentrations under dark and UV-C irradiation conditions. The results show that the synthesized TiO have an average tube diameter of 5 nm and a tube length at least about 110 nm, which are intercalated into MMT sheets in MMT/TiO photocatalyst. Meanwhile, TiO nanoparticles are immobilized on the surface of MMT sheets in the MMT/TiO photocatalyst. The photocatalytic effectiveness of rhodamine B degradation of TiO shows a significantly enhance compared to that of TiO nanoparticles. However, photocatalytic performance of MMT/TiO is lower than that of MMT/TiO. The degradation effectiveness of MMT/TiO photocatalyst reaches to 100% for 3 ppm and 90% at 10 ppm of rhodamine B, while these values are 97.5% and 85.5%, respectively, recorded for MMT/TiO.
本文旨在通过一种基于二氧化钛纳米颗粒和蒙脱石的简单湿法搅拌方法，合成蒙脱石/二氧化钛纳米颗粒（MMT/TiO）和蒙脱石/二氧化钛纳米管（MMT/TiO）光催化剂。它们可能会积累吸附和光降解的效果。然后，将这些光催化剂应用于降解染料废水中的罗丹明B。使用透射电子显微镜（TEM）、扫描电子显微镜（SEM）、X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）和能量色散X射线光谱（EDX）对光催化剂进行结构表征。通过在黑暗和紫外-C照射条件下不同浓度的罗丹明B降解来评估光催化剂的光催化活性和有效性。结果表明，合成的TiO平均管径为5nm，管长至少约为110nm，它们插入到MMT/TiO光催化剂的MMT片层中。同时，TiO纳米颗粒固定在MMT/TiO光催化剂中MMT片层的表面。TiO对罗丹明B的光催化降解效果相比TiO纳米颗粒有显著提高。然而，MMT/TiO的光催化性能低于MMT/TiO。MMT/TiO光催化剂对3ppm罗丹明B的降解效率达到100%，对10ppm的降解效率为90%，而MMT/TiO的相应值分别为97.5%和85.5%。
