TY - JOUR
T1 - Fabrication of a high-efficiency CdS@TiO2@C/Ti3C2 composite photocatalyst for the degradation of TC-HCl under visible light
AU - Ren, Juanjuan
AU - Wang, Lili
AU - Gong, Qianqian
AU - Xuan, Jingyue
AU - Sun, Meiling
AU - Zhang, Qi
AU - Zhang, Haifeng
AU - Yin, Guangchao
AU - Liu, Bo
PY - 2022
Y1 - 2022
N2 - A novel CdS@TiO2@C/Ti3C2 composite as a high-efficiency photocatalyst for the degradation of tetracycline hydrochloride (TC-HCl) was fabricated by in situ oxidizing two-dimensional (2D) layered transition metal Ti3C2 MXene and subsequently compounding with CdS nanoparticles (NPs) via a two-step hydrothermal method. Benefitting from the in situ oxidation of Ti3C2 MXene, the derived TiO2@C/Ti3C2 composites possess excellent interface contact and uniform morphology distribution. Furthermore, the in situ grown TiO2 displays a nanosheet (NS) structure with high-energy (001) facets, which could bring about unique surface heterojunctions between the (101) and (001) facets of the TiO2 NSs. On the above basis, CdS NPs are introduced to effectively improve the light-harvesting ability in the visible region due to the narrow band gap and enlarged surface area. Meanwhile, the separation and transfer efficiencies of photo-generated carriers are significantly enhanced by the synergistic effect of the C/Ti3C2 matrix, surface heterojunctions of the TiO2 NSs and heterojunctions of CdS/TiO2. Therefore, the CdS@TiO2@C/Ti3C2 composites display remarkably enhanced photocatalytic ability for TC-HCl degradation under the irradiation of visible light, and the CdS@TiO2@C/Ti3C2-2 sample exhibits optimal photodegradation efficiency with a value of 85% within 60 min, which is 8.5 times higher than that of the TiO2@C/Ti3C2 sample. Additionally, the corresponding improved mechanism is also deeply discussed in the present paper.
AB - A novel CdS@TiO2@C/Ti3C2 composite as a high-efficiency photocatalyst for the degradation of tetracycline hydrochloride (TC-HCl) was fabricated by in situ oxidizing two-dimensional (2D) layered transition metal Ti3C2 MXene and subsequently compounding with CdS nanoparticles (NPs) via a two-step hydrothermal method. Benefitting from the in situ oxidation of Ti3C2 MXene, the derived TiO2@C/Ti3C2 composites possess excellent interface contact and uniform morphology distribution. Furthermore, the in situ grown TiO2 displays a nanosheet (NS) structure with high-energy (001) facets, which could bring about unique surface heterojunctions between the (101) and (001) facets of the TiO2 NSs. On the above basis, CdS NPs are introduced to effectively improve the light-harvesting ability in the visible region due to the narrow band gap and enlarged surface area. Meanwhile, the separation and transfer efficiencies of photo-generated carriers are significantly enhanced by the synergistic effect of the C/Ti3C2 matrix, surface heterojunctions of the TiO2 NSs and heterojunctions of CdS/TiO2. Therefore, the CdS@TiO2@C/Ti3C2 composites display remarkably enhanced photocatalytic ability for TC-HCl degradation under the irradiation of visible light, and the CdS@TiO2@C/Ti3C2-2 sample exhibits optimal photodegradation efficiency with a value of 85% within 60 min, which is 8.5 times higher than that of the TiO2@C/Ti3C2 sample. Additionally, the corresponding improved mechanism is also deeply discussed in the present paper.
U2 - 10.1039/d1nj05786c
DO - 10.1039/d1nj05786c
M3 - Article
SN - 1144-0546
VL - 46
SP - 3305
EP - 3314
JO - New Journal of Chemistry
JF - New Journal of Chemistry
IS - 7
ER -