两亲型杯芳烃诱导ZnO微纳结构的合成及光催化性能

回流条件下将两亲型杯芳烃,即丙基间苯二酚杯[4]芳烃(PRCA)、己基间苯二酚杯[4]芳烃(HRCA)和壬基间苯二酚杯[4]芳烃(NRCA),应用于诱导制备ZnO微纳结构,采用X射线衍射、扫描电镜、紫外可见漫反射光谱、红外光谱、X射线光电子能谱等分析了所制备ZnO样品的组成、形貌与微观结构,并以罗丹明B为模型污染物考察了所制备杯芳烃保护的ZnO样品的光催化性能。表征结果显示当杯芳环下缘所连直链烷基中含较多碳原子个数时(HRCA和NRCA),可调控ZnO粒子的尺寸和形貌;而无保护剂和下缘连接较短直链烷基的间苯二酚杯[4]芳烃(PRCA)调控ZnO形貌的能力较弱。模拟太阳光照射下,HRCA-ZnO和NRCA-ZnO的光催化效率相近且均高于无保护剂制备的ZnO和PRCA-ZnO。

Synthesis and Photocatalytic Performance of ZnO Micro/Nano Materials Induced by Amphiphilic Calixarene

The amphiphilic calixarene, namely propyl resorcinol calix[4]arene (PRCA), hexyl resorcinol calix[4] arene (HRCA), and nonyl resorcinol calix[4]arene (NRCA), was used to induce the preparation of ZnO micro-nano structure under the refluxing condition seperately. The composition, morphology, and microstructure of the samples were analyzed by X-ray diffraction, scanning electron microscope, FT-IR, UV-Vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. Rhodamine B was used as a simulated pollutant to investigate the photocatalytic performance of the ZnO micro-nano structure protected by the resorcinol calix[4]arene. The characterization results showed that the size and morphology of ZnO particles could be controlled by the amphiphilic calixarenes which contained more carbon atoms in the linear alkyl chain connecting to the lower edge (HRCA and NRCA). However, the ability to control the morphology of ZnO was weak when without a protective agent and the resorcinol calix[4]arene with a short linear alkyl chain at the lower edge (PRCA). Under simulated sunlight, the photocatalytic efficiency of HRCA-ZnO and NRCA-ZnO was similar and higher than those of ZnO prepared without a protective agent and PRCA-ZnO.