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二氧化钛纳米管增强水泥浆体的光催化性能评估

Photocatalytic Performance Evaluation of Titanium Dioxide Nanotube-Reinforced Cement Paste.

作者信息

Liu Junxing, Jee Hyeonseok, Lim Myungkwan, Kim Joo Hyung, Kwon Seung Jun, Lee Kwang Myong, Zal Nezhad Erfan, Bae Sungchul

机构信息

Department of Architectural Engineering, Hanyang University, 222, Wangsimni-ro, Sungdong-gu, Seoul 04763, Korea.

Department of Architecture Engineering, Songwon University, Gwangju 61756, Korea.

出版信息

Materials (Basel). 2020 Nov 28;13(23):5423. doi: 10.3390/ma13235423.

DOI:10.3390/ma13235423
PMID:33260575
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7729800/
Abstract

Considering the increase in research regarding environmental pollution reduction, the utilization of cementitious material, a commonly used construction material, in photocatalysts has become a desirable research field for the widespread application of photocatalytic degradation technology. Nano-reinforcement technology for cementitious materials has been extensively researched and developed. In this work, as a new and promising reinforcing agent for cementitious materials, the photocatalytic performance of titanium dioxide nanotube (TNT) was investigated. The degradation of methylene blue was used to evaluate the photocatalytic performance of the TNT-reinforced cement paste. In addition, cement paste containing micro-TiO (m-TiO) and nano-TiO (n-TiO) particles were used for comparison. Moreover, the effect of these TiO-based photocatalytic materials on the cement hydration products was monitored via X-ray diffraction (XRD) and thermogravimetric analysis (TG). The results indicated that all the TiO based materials promoted the formation of hydration products. After 28 days of curing, the TNT-reinforced cement paste contained the maximum amount of hydration products (Ca(OH)). Furthermore, the cement paste containing TNT exhibited better photocatalytic effects than that containing n-TiO, but worse than that containing m-TiO.

摘要

考虑到关于减少环境污染的研究不断增加,作为一种常用建筑材料的胶凝材料在光催化剂中的应用已成为光催化降解技术广泛应用的一个理想研究领域。用于胶凝材料的纳米增强技术已得到广泛研究和开发。在这项工作中,作为一种新型且有前景的胶凝材料增强剂,研究了二氧化钛纳米管(TNT)的光催化性能。利用亚甲基蓝的降解来评估TNT增强水泥浆体的光催化性能。此外,还使用了含有微米级TiO(m-TiO)和纳米级TiO(n-TiO)颗粒的水泥浆体进行比较。此外,通过X射线衍射(XRD)和热重分析(TG)监测了这些TiO基光催化材料对水泥水化产物的影响。结果表明,所有TiO基材料都促进了水化产物的形成。养护28天后,TNT增强水泥浆体中所含的水化产物(Ca(OH))量最多。此外,含有TNT的水泥浆体比含有n-TiO的水泥浆体表现出更好的光催化效果,但比含有m-TiO的水泥浆体差。

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