Simple synthesis method of Bi2S3/CdS quantum dots cosensitized TiO2 nanotubes array with enhanced photoelectrochemical and photocatalytic activity
Simple synthesis method of Bi2S3/CdS quantum dots cosensitized TiO2 nanotubes array with enhanced photoelectrochemical and photocatalytic activity
复制标题
具有增强光电化学和光催化活性的Bi2S3/CdS量子点共敏TiO2纳米管阵列的简单合成方法
DOI：
10.1039/c3ce40863a
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发表时间：
2013-01-01
期刊：
影响因子：
3.1
通讯作者：
Wu, Di
中科院分区：
文献类型：
--
作者：
Lv, Pin;Fu, Wuyou;Wu, Di
采用恒电位阳极氧化法（恒电位阳极氧化生长法）制备了顶部直接形成纳米线的TiO2纳米管阵列膜（记为TiO2 NTWs）。采用简单的连续离子层吸附反应（S-SILAR）在CdS/TiO2 NTWs阵列上敏化Bi2S3量子点。在AM 1.5 g的光照下，获得了2.16 mA cm−2的短路光电流密度。光电性能测试数据表明，Bi2S3/CdS共改性可使裸TiO2 NTWs的光电流密度提高308%。通过对罗丹明B （RhB）和甲基橙（MO）溶液进行光催化活性测试，分别在240 min和210 min后完全降解。本研究表明，Bi2S3/CdS/TiO2 NTWs阵列可以应用于光催化器件，其最大的优点是成本低、易于重复使用和可循环利用。
A TiO2 nanotubes array film with nanowires directly formed on top (denoted as TiO2 NTWs) was prepared by an anodization method (potentiostatic anodization growth). Bi2S3 QDs were sensitized on the CdS/TiO2 NTWs array by a simple successive ionic layer adsorption and reaction (S-SILAR). A short-circuit photocurrent density of 2.16 mA cm−2 was obtained under an illumination of AM 1.5 G. The data of the photoelectrochemical performance test show that Bi2S3/CdS co-modification can boost the photocurrent density of the bare TiO2 NTWs by up to 308%. The photocatalytic activity was tested by treating rhodamine B (RhB) and methyl orange (MO) solutions, which were degraded completely after 240 min and 210 min, respectively. The present study shows the Bi2S3/CdS/TiO2 NTWs array can be applied in photocatalytic devices, and the greatest advantages are low-cost, easy reuse and recyclability.