Pt改性的高结晶度TiO2晶须的光催化性能

催化学报 , 2010, 31(10): 1271-1276. doi: 10.3724/SP.J.1088.2010.00408

Pt改性的高结晶度TiO2晶须的光催化性能

丁玉兰 ^1, , 柏扬 ^2, , 李伟 ^3, , 陈闪山 ^4, , 朱育丹 ^5, , 朱银华 ^6, , 杨祝红 ^7, , 陆小华 ^8,

1.南京工业大学材料化学工程国家重点实验室,江苏南京210009

2.南京工业大学材料化学工程国家重点实验室,江苏南京210009

3.南京工业大学材料化学工程国家重点实验室,江苏南京210009

4.南京工业大学材料化学工程国家重点实验室,江苏南京210009

5.南京工业大学材料化学工程国家重点实验室,江苏南京210009

6.南京工业大学材料化学工程国家重点实验室,江苏南京210009

7.南京工业大学材料化学工程国家重点实验室,江苏南京210009

8.南京工业大学材料化学工程国家重点实验室,江苏南京210009

基金项目: 国家高技术研究发展计划(863计划)(2006AA03Z455) 国家自然科学基金重点项目(20736002) 江苏省普通高校研究生科研创新计划国家自然科学基金委员会与香港研究资助局联合科研基金(20731160614) 江苏省产学研联合创新资金(BY2009107) 国家自然科学基金(20976080) 江苏省高技术研究项目(BG2007051)

关键词：铂 , 二氧化钛 , 晶须 , 光催化 , 苯酚 , 降解

Highly Crystalline TiO2 Whisker Modified with Pt and Its Photocatalytic Performance

以二钛酸钾(K2Ti2O5)为前驱体,通过离子交换和800℃焙烧制备了TiO2晶须(TiO2(800℃)),并采用乙二醇胶体法,在TiO2(800℃)样品上负载1%Pt纳米颗粒制成了Pt/TiO2(800℃)催化剂.采用X射线衍射、扫描电镜、透射电镜、X荧光光谱和低温N2吸附-脱附等技术对催化剂进行了表征,并考察了该催化剂光催化降解苯酚活性及稳定性.结果表明,TiO2(800℃)样品为结晶度较高的纯锐钛矿TiO2,载Pt后催化活性提高到原来的2.3倍,具有很高的单位比表面积活性.催化剂经10次重复使用后,Pt流失量仅为6%,活性为新鲜催化剂的91%.而低结晶度的纯锐钛矿或混晶的TiO2负载Pt催化剂的活性和稳定性均不及Pt/TiO2(800℃).

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