生物质氮磷自掺杂二氧化钛的制备和表征  

Synthesis and characterization of TiO_2 self-doped with biogenic nitrogen and phosphorus

作　　者：韩婷[1] 姚炜[2] 张豪杰[2] 范同祥[1] 何丹农[2] 

机构地区：[1]上海交通大学金属基复合材料国家重点实验室,上海200240 [2]纳米技术及应用国家工程研究中心,上海200241

出　　处：《江苏大学学报（自然科学版）》2011年第1期56-59,共4页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(50972090);国家科技支撑重点项目(2007BAJ03B02);上海市教委曙光计划项目(08SG015)

摘　　要：选取黄豆为生物质氮磷源,以水溶性钛化合物为钛源,经过酸洗、水溶性钛化合物浸泡、梯度干燥和500℃烧结,得到氮磷掺杂二氧化钛.通过X射线衍射仪和X射线光电子能谱仪分析所得样品的结构和成分,表明其为单相锐钛矿结构的二氧化钛,且黄豆本身所含的氮、磷元素自掺杂到晶格中;UV-V is吸收光谱显示,与未掺杂二氧化钛相比,氮磷掺杂二氧化钛在紫外可见光区吸收增强,且吸收边发生红移.光催化降解试验表明氮磷掺杂二氧化钛对罗丹明6G溶液的降解速率是未掺杂二氧化钛的1.4倍.利用废弃生物质进行自掺杂的方法避免了人工掺杂方法所需的有毒化学试剂的添加,有望推广到其他氮磷掺杂金属氧化物的制备中.Soybeans and water-soluble titanium complexes are selected as biogenic nitrogen and phosphorus sources respectively to synthesize biogenic nitrogen and phosphorus self-doped TiO2.X-ray diffraction and X-ray photoelectron spectroscopy are conducted to characterize the structure and composition of the samples,which show that they possess single anatase phase,and that nitrogen and phosphorus contained in original soybeans are self-doped into the lattice.UV-Vis spectroscopy displays that N-P-doped TiO2 exhibits an enhanced absorption in the UV-Vis light range and red shift of the absorption edge,compared to undoped TiO2.Furthermore,degradation experiments of rhodamine 6G solution indicate superior photocatalytic activity of N-P-TiO2,of which the degradation rate is 1.4 times that of undoped TiO2.This work may pave a new pathway for synthesizing the discarded biomass and other metal oxides self-doped with biogenic nitrogen and phosphorus.

关 键 词：二氧化钛 掺杂 生物质 氮 磷 光催化 

分 类 号：O644.1[理学—物理化学]