Shi Gui-Mei, Zhang Bin, Xu Xin-Xin, Fu Yan-Hong
College of Science, Shenyang University of Technology, No.111, Shenliao West Road, Economic & Technological Development Zone, Shenyang, 110870, P. R. China.
Dalton Trans. 2015 Jun 28;44(24):11155-64. doi: 10.1039/c5dt01190f. Epub 2015 May 22.
A visible light active photocatalyst was synthesized successfully by coating graphene oxide (GO) on a coordination polymer nanobelt (CPNB) using a simple colloidal blending process. Compared with neat CPNB, the resulting graphene oxide coated coordination polymer nanobelt composite material (GO/CPNB) exhibits excellent photocatalytic efficiency in the reduction of K2Cr2O7 under visible light irradiation. In the composite material, GO performs two functions. Firstly, it cuts down the band gap (E(g)) of the photocatalyst and extends its photoresponse region from the ultraviolet to visible light region. Secondly, GO exhibits excellent electron transportation ability that impedes its recombination with holes, and this can enhance photocatalytic efficiency. For GO, on its surface, the number of functional groups has a great influence on the photocatalytic performance of the resulting GO/CPNB composite material and an ideal GO"coater" to obtain a highly efficient GO/CPNB photocatalyst has been obtained. As a photocatalyst that may be used in the treatment of Cr(VI) in wastewater, GO/CPNB exhibited outstanding stability during the reduction of this pollutant.
通过简单的胶体共混工艺将氧化石墨烯（GO）包覆在配位聚合物纳米带（CPNB）上，成功合成了一种可见光活性光催化剂。与纯CPNB相比，所得的氧化石墨烯包覆配位聚合物纳米带复合材料（GO/CPNB）在可见光照射下还原K2Cr2O7时表现出优异的光催化效率。在该复合材料中，GO发挥两种功能。首先，它降低了光催化剂的带隙（E(g)），并将其光响应区域从紫外光区扩展到可见光区。其次，GO具有优异的电子传输能力，可阻止其与空穴复合，从而提高光催化效率。对于GO而言，其表面官能团的数量对所得GO/CPNB复合材料的光催化性能有很大影响，并且已经获得了一种理想的GO“包覆剂”以制备高效的GO/CPNB光催化剂。作为一种可用于处理废水中Cr(VI)的光催化剂，GO/CPNB在还原该污染物的过程中表现出出色的稳定性。
