TY - JOUR
T1 - Hierarchical Ag3PO4/TiO2@C composites derived from Ti3C2 MXene for enhanced photocatalytic activity
AU - Wang, Lili
AU - Ren, Juanjuan
AU - Gong, Qianqian
AU - Xuan, Jingyue
AU - Sun, Meiling
AU - Zhang, Haifeng
AU - Zhang, Qi
AU - Yin, Guangchao
AU - Liu, Bo
PY - 2022
Y1 - 2022
N2 - Herein, a high-performance Ag3PO4/TiO2@C composite photocatalyst was successfully fabricated through the unique structure and interface designs. Firstly, a novel three-dimensional layered carbon-supported titanium dioxides (TiO2@C) nanosheets (NSs) are fabricated by employing the new-type two-dimensional layered transition metal Ti3C2 MXene as carbon skeleton and homologous titanium source via a facile hydrothermal method. Benefiting from the structure characters of Ti3C2 MXene and in-situ growth, the as-prepared TiO2@C NSs own a large surface area and good interface contact. On this basis, taking advantage of the surface electronegativity of Ti3C2 MXene drove TiO2@C, Ag3PO4 nanoparticles are further combined with TiO2@C via an electrostatic self-assembly method to improve the light-harvesting ability. The electrostatic self-assembly process is beneficial to the uniform growth of Ag3PO4 nanoparticles and the formation of a good heterostructure interface between Ag3PO4 and TiO2@C. Therefore, the as-prepared Ag3PO4/TiO2@C composites as photocatalyst exhibit excellent photocatalytic performance, and the optimal photocatalytic degradation rate constant for methylene blue achieves 4.768 x 10(-2) min(-1). The enhanced photocatalytic performance is mainly attributed to the synergistic effect of larger surface area, better light-harvesting ability, and superior charge transfer and separation characters. Additionally, the growth and optimization mechanisms are also deeply studied in the present paper.
AB - Herein, a high-performance Ag3PO4/TiO2@C composite photocatalyst was successfully fabricated through the unique structure and interface designs. Firstly, a novel three-dimensional layered carbon-supported titanium dioxides (TiO2@C) nanosheets (NSs) are fabricated by employing the new-type two-dimensional layered transition metal Ti3C2 MXene as carbon skeleton and homologous titanium source via a facile hydrothermal method. Benefiting from the structure characters of Ti3C2 MXene and in-situ growth, the as-prepared TiO2@C NSs own a large surface area and good interface contact. On this basis, taking advantage of the surface electronegativity of Ti3C2 MXene drove TiO2@C, Ag3PO4 nanoparticles are further combined with TiO2@C via an electrostatic self-assembly method to improve the light-harvesting ability. The electrostatic self-assembly process is beneficial to the uniform growth of Ag3PO4 nanoparticles and the formation of a good heterostructure interface between Ag3PO4 and TiO2@C. Therefore, the as-prepared Ag3PO4/TiO2@C composites as photocatalyst exhibit excellent photocatalytic performance, and the optimal photocatalytic degradation rate constant for methylene blue achieves 4.768 x 10(-2) min(-1). The enhanced photocatalytic performance is mainly attributed to the synergistic effect of larger surface area, better light-harvesting ability, and superior charge transfer and separation characters. Additionally, the growth and optimization mechanisms are also deeply studied in the present paper.
U2 - 10.1007/s10853-022-06970-x
DO - 10.1007/s10853-022-06970-x
M3 - Article
SN - 0022-2461
VL - 57
SP - 5396
EP - 5409
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 9
ER -