Đăng nhập
 
Tìm kiếm nâng cao
 
Tên bài báo
Tác giả
Năm xuất bản
Tóm tắt
Lĩnh vực
Phân loại
Số tạp chí
 

Bản tin định kỳ
Báo cáo thường niên
Tạp chí khoa học ĐHCT
Tạp chí tiếng anh ĐHCT
Tạp chí trong nước
Tạp chí quốc tế
Kỷ yếu HN trong nước
Kỷ yếu HN quốc tế
Book chapter
Tạp chí quốc tế 2022
Số tạp chí 7(2022) Trang: 40163−40175
Tạp chí: ACS Omega

In this work, CoTiO3/TiO2 (CTO/Ti) heterostructures were prepared by a hydrothermal procedure in a neutral medium using perovskite CoTiO3 and tetraisopropyl titanate. Characteristics of the synthesized catalysts were analyzed by various techniques including X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, UV–vis diffuse reflectance spectroscopy, Brunauer–Emmett–Teller adsorption–desorption, energy-dispersive X-ray spectroscopy, field emission scanning electron microscopy, high-resolution transmission electron microscopy, and point of zero charges. The activity in the photodegradation of cinnamic acid (CA) under UV-A irradiation of the CTO/Ti heterostructure was investigated and compared with individual materials TiO2 (Ti-w) and CoTiO3 (CTO). The investigation showed that the heterostructured CoTiO3/TiO2 catalyst with optimal composition (5% CTO) exhibited much higher photocatalytic activity for degradation of cinnamic acid than individual CoTiO3 and TiO2. Under the optimal conditions (Ccat = 0.75 g/L, Qair = 0.3 L/min, and pH = 3.8) the 90 min conversion of cinnamic acid reached 80.9% on 5CTO/Ti, much higher than those of CTO (4.6%) and Ti-w (75.2%). It was found that the enhancement in activity for the CA removal of the CTO/Ti heterostructure was due to the construction of a heterojunction structure between TiO2(Ti-w) and CoTiO3 that resulted in an increase in the specific surface area and porosity, reduction of the band gap energy, and higher efficient separation of charge carriers on the surface to prevent recombination. Alternatively, a comparison of the recyclability of 5CTO/Ti and Ti-w was made for CA degradation. The results showed a decrease in the CA conversion by 38% on 5CTO/Ti and 48% on Ti-w after six reaction cycles.

Các bài báo khác
Số tạp chí 15(2022) Trang: 281-309
Tạp chí: Asian Journal of Business and Accounting
Số tạp chí 0(2022) Trang: 1-18
Tác giả: Trần Ngọc Tâm
Tạp chí: Optimization
Số tạp chí 6(2022) Trang: 1140-1145
Tạp chí: Tropical Journal of Natural Product Research
Số tạp chí 25(2022) Trang: 203-214
Tạp chí: Bulletin of Monetary Economics and Banking (Buletin Ekonomi Moneter dan Perbankan)
Số tạp chí 18(2022) Trang: 976-987
Tạp chí: Journal of Language and Linguistic Studies


Vietnamese | English






 
 
Vui lòng chờ...