Circular self-cleaning building materials and fabrics using dual doped TiO2 nanomaterials

IF 1.4 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
E. Karagiannis, Dimitra Papadaki, M. Assimakopoulos
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引用次数: 0

Abstract

Nanostructured titanium dioxide (TiO2) among other oxides can be used as a prominent photocatalytic nanomaterial with self-cleaning properties. TiO2 is selected in this research, due to its high photocatalytic activity, high stability and low cost. Metal doping has proved to be a successful approach for enhancing the photocatalytic efficiency of photocatalysts. Photocatalytic products can be applied in the building sector, using both building materials as a matrix, but also in fabrics. In this study undoped and Mn-In, Mn-Cu, In-Ni, Mn-Ni bimetallic doped TiO2 nanostructures were synthesized using the microwave-assisted hydrothermal method. Decolorization efficiency of applied nanocoatings on fabrics and 3-D printed sustainable blocks made from recycled building materials was studied, both under UV as well as visible light for Methylene Blue (MB), using a self-made depollution and self-cleaning apparatus. Nanocoated samples showed high MB decolorization and great potential in self-cleaning applications. Results showed that the highest MB decolorization for both applications were observed for 0.25 at% Mn-In doped TiO2. For the application of 3-D printed blocks Mn-In and In-Ni doped TiO2 showed the highest net MB decolorization, 25.1 and 22.6%, respectively. For the application of nanocoated fabrics, three samples (Mn-In, In-Ni and Mn-Cu doped TiO2) showed high MB decolorization (58.1, 52.7 and 47.6%, respectively) under indirect sunlight, while under UV light the fabric coated with Mn-In and In-Ni doped TiO2 showed the highest MB decolorization rate 26.1 and 24.0%, respectively.
使用双掺杂TiO2纳米材料的圆形自清洁建筑材料和织物
纳米二氧化钛(TiO2)是一种具有自清洁特性的纳米光催化材料。本研究选择TiO2,是因为其光催化活性高、稳定性高、成本低。金属掺杂已被证明是提高光催化剂光催化效率的有效途径。光催化产品可以应用于建筑领域,既可以使用建筑材料作为基质,也可以应用于织物。本研究采用微波辅助水热法合成了未掺杂和Mn-In、Mn-Cu、In- ni、Mn-Ni双金属掺杂的TiO2纳米结构。利用自制的去污自清洁装置,研究了纳米涂层在UV和可见光下对亚甲基蓝(MB)的脱色效果。纳米包覆样品表现出较高的MB脱色率和自清洁应用潜力。结果表明,当Mn-In掺杂的TiO2浓度为0.25时,两种应用的MB脱色率均最高。对于3d打印块体的应用,Mn-In和In-Ni掺杂TiO2的净MB脱色率最高,分别为25.1%和22.6%。对于纳米涂层织物的应用,3种样品(Mn-In, In-Ni和Mn-Cu掺杂TiO2)在间接阳光下的MB脱色率分别为58.1%,52.7和47.6%,而在紫外光下,Mn-In和In-Ni掺杂TiO2涂层织物的MB脱色率最高,分别为26.1%和24.0%。
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来源期刊
AIMS Materials Science
AIMS Materials Science MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
3.60
自引率
0.00%
发文量
33
审稿时长
4 weeks
期刊介绍: AIMS Materials Science welcomes, but not limited to, the papers from the following topics: · Biological materials · Ceramics · Composite materials · Magnetic materials · Medical implant materials · New properties of materials · Nanoscience and nanotechnology · Polymers · Thin films.
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