Li Xin, Chen Xiang, Niu Hao, Han Xiao, Zhang Ting, Liu Jiuyu, Lin Huiming, Qu Fengyu
College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, PR China.
College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, PR China.
J Colloid Interface Sci. 2015 Aug 15;452:89-97. doi: 10.1016/j.jcis.2015.04.034. Epub 2015 Apr 22.
In this paper, CdS/TiO2 heteronanofibers have been prepared for the photocatalysis toward organic dyes under visible irradiation. Firstly, the one dimensional (1D) TiO2 porous nanofibers (50-100) nm in diameter and several micrometers in length were synthesized by electrospinning and then CdS nanopaticles (50-100 nm in size) successfully grown onto TiO2 fibers to form the heterostructure. These CdS/TiO2 heteronanofibers were adopted as photocatalyst and the photocatalsis processes were analyzed in detail, showing the enhanced visible photodecomposition and good recycle ability. Furthermore, the degradation kinetics was further investigated by varying the amount of CdS. The increase of CdS component may enhance the degradation rate under visible light, but the total degradation efficiency also is affected by the adsorption capacity of catalyst toward the dyes. With the improved visible light degradation performance, these CdS/TiO2 heteronanofibers would be expected to be used in water purification.
在本文中，已制备出CdS/TiO₂异质纳米纤维，用于在可见光照射下对有机染料进行光催化。首先，通过静电纺丝合成了直径为(50 - 100)nm、长度为几微米的一维(1D)TiO₂多孔纳米纤维，然后CdS纳米颗粒(尺寸为50 - 100nm)成功生长在TiO₂纤维上形成异质结构。这些CdS/TiO₂异质纳米纤维被用作光催化剂，并对光催化过程进行了详细分析，显示出增强的可见光光解作用和良好的循环能力。此外，通过改变CdS的量进一步研究了降解动力学。CdS组分的增加可能会提高可见光下的降解速率，但总降解效率也受催化剂对染料吸附能力的影响。随着可见光降解性能的提高，这些CdS/TiO₂异质纳米纤维有望用于水净化。
