| 海藻酸盐包覆二氧化钛微球的制备与其光催化性能 |
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| 引用本文： | 陈海锋,唐培松,曹枫,潘国祥,曾海雁. 海藻酸盐包覆二氧化钛微球的制备与其光催化性能[J]. 稀有金属材料与工程, 2010, 0(Z2) |
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| 作者姓名： | 陈海锋 唐培松 曹枫 潘国祥 曾海雁 |
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| 作者单位： | 湖州师范学院; |
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| 基金项目： | 浙江省分析测试科技计划项目(2008F70042); 浙江省钱江人才计划项目(2009R10050); 浙江省大学生科技创新活动资助项目(200930) |
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| 摘 要： | 采用溶胶-凝胶法将纳米二氧化钛装载入海藻酸钙(CA)凝胶微球,尝试二氧化钛的固化和循环多次使用。二氧化钛的前驱物是在常温下钛酸丁酯和三乙醇胺反应得到,同时该溶液中含有海藻酸钠和碳酸钠,缓慢滴入氯化钙。利用KCl-HCl混合溶液来调节pH值,形成内部是二氧化钛,外部包裹海藻酸钙的核壳结构。采用XRD,FTIR和TEM来表征该二氧化钛-海藻酸钙光催化剂的结构。XRD表明该催化剂内部二氧化钛是锐钛矿结构,FTIR显示该催化剂含有海藻酸钙。TEM照片显示催化剂的颗粒尺寸基本达到纳米级,分布范围在500～1000nm,结合实验表明其尺寸与氯化钙、海藻酸钠和四氯化钛摩尔比,pH等有关。以甲基橙为光催化降解对象,采用UV-vis吸收光谱表示降解程度,结果表明该催化剂和自制二氧化钛相比有着更优秀的催化能力。样品稳定性实验循环使用次数和退色率拟合符合Boltzmann函数规律递减。
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| 关 键 词： | 二氧化钛 海藻酸盐 光催化剂 |
Preparation and Photocatalytic Properties of the Titanium Dioxide-Alginate Composite Gel Beads |
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| Chen Haifeng,Tang Peisong,Cao Feng,Pan Guoxiang,Zeng Haiyan. Preparation and Photocatalytic Properties of the Titanium Dioxide-Alginate Composite Gel Beads[J]. Rare Metal Materials and Engineering, 2010, 0(Z2) |
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| Authors: | Chen Haifeng Tang Peisong Cao Feng Pan Guoxiang Zeng Haiyan |
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| Affiliation: | Chen Haifeng,Tang Peisong,Cao Feng,Pan Guoxiang,Zeng Haiyan (Huzhou Teachers College,Huzhou 313000,China) |
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| Abstract: | A novel method has been developed to overload anatase nano-photocatalyst into calcium alginate (CA) beads in this study. CA beads are used in many applications as matrices for release or immobilization. The problems of anatase nano-photocatalyst stability and recycle are well known in fact. Composite beads consisting of TiO2 and sodium alginate (SA) were prepared using sol-gel method. Dissoluble precursor of TiO2 was prepared by reaction of Tetrabutyl titanate and triethanolamine at room temperature, which ... |
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| Keywords: | titanium dioxide alginate photocatalyst |
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