Controllable fabrication of immobilized ternary CdS/Pt-TiO2 heteronanostructures toward high-performance visible-light driven photocatalysis

被引：23

作者：

Gao, Huazhen ^{[1
]}

Wang, Honge ^{[1
]}

Jin, Youlai ^{[1
]}

Lv, Jun ^{[1
]}

Xu, Guangqing ^{[1
]}

Wang, Dongmei ^{[1
]}

Zhang, Xinyi ^{[2
]}

Chen, Zhong ^{[3
]}

Zheng, Zhixiang ^{[1
]}

Wu, Yucheng ^{[1
,4
]}

机构：

[1] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China

[2] Monash Univ, Sch Chem, Clayton, Vic 3800, Australia

[3] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

[4] Key Lab Adv Funct Mat & Devices Anhui Prov, Hefei 230009, Peoples R China

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2015年 / 17卷 / 27期

基金：

中国国家自然科学基金;

关键词：

TIO2 NANOTUBE ARRAYS; CDS NANOPARTICLES; METHYLENE-BLUE; Z-SCHEME; DEGRADATION; PHENOL; FILM;

D O I：

10.1039/c5cp01128k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Immobilized TiO2 nanotube arrays (NTAs) co-modified with Pt and CdS nanoparticles were fabricated by using the combination of photoreduction and chemical bath deposition methods. XRD, SEM, TEM, XPS, UV-Vis and EDX methods were employed to characterize the microstructure and composition of samples, and the results showed that CdS and Pt NPs were uniformly deposited on the surface of TiO2 nanotubes. The CdS/Pt/TiO2 NTAs exhibited a much higher photocatalytic activity compared to pure TiO2 NTAs and binary CdS (or Pt)/TiO2 NTAs under visible light irradiation. A kinetic study showed that the rate constants of Pt/TiO2,TiO2 CdS/TiO2 and CdS/Pt/TiO2 NTAs are 0.00736, 0.01717 and 0.02077 min(-1), respectively, revealing a remarkable kinetic enhancement in the ternary heteronanostructures due to the synergistic effect of the three components. Besides, the CdS/Pt/TiO2 NTAs exhibit high stability after being used 22 times. Thus we proposed that such ternary heteronanostructures show great promise as immobilized catalysts for high efficient visible-light-driven photocatalysis.

引用

页码：17755 / 17761

页数：7

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