Visible light photocatalysts-N-doped TiO2 by sol-gel, enhanced with surface bound silver nanoparticle islands
Visible light photocatalysts-N-doped TiO2 by sol-gel, enhanced with surface bound silver nanoparticle islands
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DOI：
10.1039/c1jm11557j
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发表时间：
2011-01-01
影响因子：
--
通讯作者：
Parkin, Ivan P.
中科院分区：
文献类型：
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作者：
Dunnill, Charles W.;Ansari, Zarrin;Parkin, Ivan P.
采用溶胶-凝胶法制备了N掺杂二氧化钛抗菌薄膜光催化剂，并利用原位生成的银纳米粒子对其进行了增强。用X射线衍射仪、扫描电子显微镜、X射线光电子能谱、紫外可见光谱对薄膜进行了表征，并使用大肠杆菌和MRSA流行菌株EMRSA-16进行了光诱导超亲水性、硬脂酸破坏和抗菌测量的功能测试。N掺杂的TiO2光催化剂薄膜中存在间隙掺杂的氮，在XPS中的N1S峰位于400.0 eV处，因此在白光下表现出良好的光催化活性。然后，通过在表面形成纳米银颗粒，进一步提高了光催化活性。这种高活性的光催化膜被认为是对抗细菌和硬脂酸的有效试剂，使用的是英国医院常见的白色光源。
Antimicrobial thin film photocatalysts consisting of N-doped titania have been prepared by sol-gel methods and further enhanced using silver nanoparticles formed in situ on the surface of the films. The films have been characterised using XRD, SEM, XPS, UV-Visible spectroscopy and functionally tested using measurements for the photoinduced superhydrophilicity, stearic acid destruction and antimicrobial measurements using both E. coli and an epidemic strain of MRSA, EMRSA-16. The N-doped TiO2 films were seen to have interstitially doped nitrogen with the N 1s peak appearing at 400.0 eV in the XPS and as such showed good photocatalytic activity under white light. The photoactivity was then further enhanced by silver nanoparticle formations on the surface. The highly active photocatalytic films were seen to be effective agents against both bacteria and stearic acid using a white light source that is commonly found in UK hospitals.