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溶胶-凝胶法合成的掺杂TiO纳米粉末的光催化及抗菌性能

Photocatalytic and Antibacterial Properties of Doped TiO Nanopowders Synthesized by Sol-Gel Method.

作者信息

Preda Silviu, Pandele-Cușu Jeanina, Petrescu Simona Viorica, Ciobanu Elena Mădălina, Petcu Gabriela, Culiță Daniela C, Apostol Nicoleta G, Costescu Ruxandra M, Raut Iuliana, Constantin Mariana, Predoană Luminița

机构信息

Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania.

National Institute of Materials Physics, Atomiștilor 405A, 077125 Măgurele, Romania.

出版信息

Gels. 2022 Oct 20;8(10):673. doi: 10.3390/gels8100673.

DOI:10.3390/gels8100673
PMID:36286174
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9601293/
Abstract

For environmental applications, nanosized TiO-based materials are known as the most important photocatalyst and are intensively studied for their advantages such as their higher activity, lower price, and chemical and photoresist properties. Zn or Cu doped TiO nanoparticles with anatase crystalline structure were synthesized by sol-gel process. Titanium (IV) butoxide was used as a TiO precursor, with parental alcohol as a solvent, and a hydrolysing agent (ammonia-containing water) was added to obtain a solution with pH 10. The gels were characterized by TG/DTA analysis, SEM, and XPS. Based on TG/DTA results, the temperature of 500 °C was chosen for processing the powders in air. The structure of the samples thermally treated at 500 °C was analysed by XRD and the patterns show crystallization in a single phase of TiO (anatase). The surface of the samples and the oxidation states was investigated by XPS, confirming the presence of Ti, O, Zn and Cu. The antibacterial activity of the nanoparticle powder samples was verified using the gram-positive bacterium . The photocatalytic efficiency of the doped TiO nanopowders for degradation of methyl orange (MO) is here examined in order to evaluate the potential applications of these materials for environmental remediation.

摘要

在环境应用中，纳米TiO基材料被认为是最重要的光催化剂，因其具有较高的活性、较低的价格以及化学和光致抗蚀性能等优点而受到深入研究。采用溶胶-凝胶法合成了具有锐钛矿晶体结构的Zn或Cu掺杂TiO纳米颗粒。以钛酸丁酯作为TiO前驱体，以无水乙醇作为溶剂，并加入水解剂（氨水）以获得pH值为10的溶液。通过热重/差示热分析（TG/DTA）、扫描电子显微镜（SEM）和X射线光电子能谱（XPS）对凝胶进行了表征。基于TG/DTA结果，选择500℃的温度在空气中对粉末进行处理。通过X射线衍射（XRD）分析了在500℃下热处理的样品结构，图谱显示为TiO（锐钛矿）单相结晶。通过XPS研究了样品表面和氧化态，证实了Ti、O、Zn和Cu的存在。使用革兰氏阳性菌验证了纳米颗粒粉末样品的抗菌活性。在此研究了掺杂TiO纳米粉末对甲基橙（MO）降解的光催化效率，以评估这些材料在环境修复中的潜在应用。

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