木素磺酸钙模板法液相合成花簇状ZnO及其光催化性能  

LIQUID PHASE SYNTHESIS OF FLOWER CLUSTER-LIKE ZnO VIA LIGNOSITE TEMPLATE AND ITS PHOTOCATALYTIC PROPERTY

作　　者：王晓红[1,2] 谢文静[1] 郝臣[1] 张鹏飞[1] 傅小奇[1] 司乃潮[2] 

机构地区：[1]江苏大学化学化工学院,镇江212013 [2]江苏大学材料科学与工程学院,镇江212013

出　　处：《金属学报》2013年第9期1098-1104,共7页Acta Metallurgica Sinica

基　　金：国家自然科学基金项目21075054;生命分析化学国家重点实验室(南京大学)开放基金项目KLACLS1010;江苏省教育厅项目12KJD610003;江苏省自然科学基金项目SBK201322000;中国博士后基金项目2012M510123资助~~

摘　　要：采用液相沉淀法合成了花簇状纳米ZnO,利用FT-IR,UV-DRS,XRD,SEM/EDS,BET等技术对所制备的ZnO进行表征,研究了木素磺酸钙(LS)对纳米ZnO结构和形貌的影响.以甲基橙脱色降解为模型反应,考察了掺杂木素磺酸钙及不同煅烧温度对ZnO的物理结构和光催化脱色性能的影响.结果表明,掺杂木素磺酸钙能明显改变ZnO形貌,改善表面状态,使其比表面积增加,表面产生更多的羟基.煅烧后的木素磺酸钙掺杂ZnO较未掺杂样品具有更好的光催化活性.煅烧温度对光催化剂的晶体结构、表面性能和光催化活性产生较大影响,300℃煅烧处理后样品的结晶度较高,颗粒粒径较细,光催化活性较好.In recent years, increasing interest has been concentrated in the treatment of organic pollutants in wastewater or sewage by means of photocatalysis based on semiconductor nano-catalysts. Photocatalysis is a very potential method for the complete destruction of contaminants and wide selection of target polluted compounds. ZnO as a very efficient metal oxide semiconductor photocatalyst has been studied extensively since found. Owing to its abundant availability, cost effectiveness, non- toxicity, reusability, high photo-sensitivity and excellent chemical stability, wide band gap and large excitation binding energy at room temperature, ZnO displays a promising application. Organic pollu- tion in water can be significantly reduced when ZnO is used as photocatalyst and secondary pollution could be avoided by the mineralization of inorganic ions, which is quite attractive in the field of en- vironmental protection technology. In this work, the purpose was to use inexpensive lignosite from low-priced resources of lignin as surfactant, template and nucleating promoter to prepare nanocrystalline ZnO to cut down the synthesis cost. Flower cluster-like nanometer ZnO photocatalysts doped with different amounts of lignosite were prepared by liquid-phase precipitation. The prepared pure ZnO and lignosite doped ZnO（ZnO-LS） samples were characterized by FT-IR, UV-Vis diffusion refraction spectroscopy （UV-DRS）, XRD, SEM/EDS and BET. The photocatalytic activity of the samples was evaluated by the photodegradation of methyl orange under UV light irradiation. The results showed that lignosite doping significantly altered the morphology of ZnO, improved zinc oxide surface state, increased the specific surface area, made ZnO produce more hydroxyl on the surface, and was helpful to obtain petal-like ZnO. On the other hand, the calcination temperatures influenced the crystallinity and crystal size of the photocatalysts. The tests indicated that the sample calcined at 300 I2 had good crystallinity and a small crystal size. At th

关 键 词：纳米ZNO 木素磺酸钙 光催化 甲基橙 

分 类 号：O614.24[理学—无机化学] O643.36[理学—化学]