TiO<sub>2</sub>/硅藻土/泥炭藓复合光催化调湿材料研究

doi:10.11896/cldb.20010113

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Abstract Excellent indoor air environment is of great significance to ensure the health and comfort of residents. The composite of diatomite and nano-TiO₂ may produce synergistic effect, which is expected to degrade formaldehyde and control humidity at the same time. The effect of TiO₂/diatomite/sphagnum on the degradation of formaldehyde and the control of temperature and humidity was studied by chamber experiment. It shows that the photocatalytic humidity-controlling materials can effectively degrade formaldehyde and control temperature and humidity. Based on XRD, SEM, UV-visible light absorbance and FTIR analysis, the degradation mechanism of formaldehyde and the mechanism of temperature and humidity regulation of TiO₂/diatomite/sphagnum composite were studied. The researches show that under natural light, TG-1∶7 material can control the formaldehyde concentration in the small chamber within 0.06 mg/m³, and the formaldehyde reduction rate reaches 89.1%; TG-1∶7 mate-rial can effectively control the relative humidity in the small chamber at 58% RH, and can adjust the indoor temperature to a certain extent. The combination of TiO₂ and diatomite humidity-controlling material can improve the separation of photo-generated electrons (e^-) and photo-generated holes (h⁺) in the semiconductor, delay the rate of recombination of h⁺ and e^-, and narrow the band gap. A large number of silicon hydroxyl groups on the surface of the photocatalytic humidity-controlling materials can generate more Bronsted acid site, which can effectively capture h⁺ and generate hydroxyl radicals (·OH), which enhances the photocatalytic activity of TiO₂.

Key words： photocatalytic humidity-controlling materials control of temperature and humidity formaldehyde reduction rate band gap

Published: 04 June 2021

CLC number:

TU50

Fund:National Natural Science Foundation of China (51362021),Science and Technology Project of Jiangxi Provincial Water Resources Department (KT201331).

About author:: Mingyu Hu, a native of Yichun, Jiangxi Province, was born in 1958. She is a professor and doctoral supervisor of Nanchang University. She is mainly engaged in the research of ecological environment materials, buil-ding energy-saving materials and building structural materials.

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	HU Mingyu
	ZHOU Xia
	LI Ye
	TAN Yuqiu

Cite this article:

HU Mingyu,ZHOU Xia,LI Ye, et al. Study on TiO₂/Diatomite/Sphagnum Composite Photocatalytic Humidity-controlling Materials[J]. Materials Reports, 2021, 35(10): 10036-10041.

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http://www.mater-rep.com/EN/10.11896/cldb.20010113 OR http://www.mater-rep.com/EN/Y2021/V35/I10/10036

1 Zhu Yingxin.Building environment, China Building Industry Press, China, 2016(in Chinese).
朱颖心. 建筑环境学,中国建筑工业出版社, 2016.
2 Zheng J Y. Study on the heat-moisture migration process in diatomite-based humidity-controlling materials and its application in buildings. Ph.D. Thesis, Southeast University, China, 2015 (in Chinese).
郑佳宜. 硅藻土基调湿材料内热湿迁移过程及其在建筑中的应用研究. 博士学位论文,东南大学,2015.
3 Xie H H. Study on the thermodynamic properties of composite humidity control materials and the effects of thermal and humid environment. Ph.D. Thesis, Hunan University,China, 2018 (in Chinese).
谢华慧. 复合调湿材料热力学性能及热湿环境影响研究. 博士学位论文, 湖南大学,2018.
4 Chen Z. Study on the theory, preparation and properties of composite heat and humidity control materials. Ph.D. Thesis, Nanjing University, China, 2017 (in Chinese).
陈智. 复合调热调湿材料的理论、制备及性能研究. 博士学位论文, 南京大学, 2017.
5 Yang J. The effect of porous humidity-conditioning materials on the indoor hot and humid environment. Master's Thesis, Nanjing University,China, 2015 (in Chinese).
杨骏. 多孔调湿材料对室内热湿环境的影响. 硕士学位论文, 南京大学,2015.
6 Hu M Y, Fu C, Wei L L, et al. Materials Reports B: Research Papers, 2018, 32 (4),1230 (in Chinese).
胡明玉, 付超, 魏丽丽, 等. 材料导报:研究篇, 2018, 32(4),1230.
7 Sun Q, Li H, Zheng S, et al. Applied Surface Science, 2014, 311, 369.
8 Gao R Q, Hao D D, Geng Y. Journal of Composite Materials, 2016, 33 (1),142 (in Chinese).
高如琴, 郝丹迪, 耿悦. 复合材料学报,2016,33(1),142.
9 Li M Z, Liu Y Y, Zheng S L, et al. Non-Metallic Minerals, 2019,42 (3), 83 (in Chinese).
李铭哲, 刘阳钰, 郑水林, 等. 非金属矿,2019,42(3),83.
10 Zhang G, Sun Z, Duan Y, et al. Applied Surface Science,2017,412, 105.
11 Fu C. Preparation and properties of humidity-controlling building materials with water resistance. Master's Thesis, Nanchang University, China, 2018 (in Chinese).
付超. 耐水性建筑调湿材料的制备及性能研究. 硕士学位论文, 南昌大学, 2018.
12 GB/T 18883-2002, Indoor air quality standards, China Standard Press, China, 2003 (in Chinese).
GB/T 18883-2002, 室内空气质量标准, 中国标准出版社, 2003.
13 Liang W, Lv M, Yang X. Building and Environment, 2016, 101,110.
14 ASHRAE Standard 55-2013.Thermal environmental conditions for human occupancy. American Society of Heating, Refrigerating and Air-Conditio-ning Engineers,2013.
15 Xiao G, Huang A, Su H, et al.Building and Environment, 2013, 65, 215.
16 Sun Z, Li C, Yao G, et al. Materials & Design, 2016, 94,403.
17 Zhu Qingwei, Zhang Yihe, et al. Chemical Engineering Journal, 2011, 61, 68
18 Khataee A R, Kasiri M B.Journal of Molecular Catalysis A: Chemical, 2010, 328(1-2), 8.
19 Zhang Y, Wang D, Zhang G. Chemical Engineering Journal, 2011, 173(1), 1.
20 Padmanabhan S K, Pal S, Haq E U, et al. Applied Catalysis A: General, 2014, 485,157.
21 Tang W, Qiu K, Zhang P, et al. Applied Surface Science, 2016, 362, 545.
22 Liu J, Zhang G. Physical Chemistry Chemical Physics, 2014, 16(18), 8178.
23 Xia Y. Preparation of diatomite-loaded phosphorus-doped titanium dioxide and its visible light photocatalytic activity. Ph.D. Thesis, Jilin University, China, 2014 (in Chinese).
夏悦. 硅藻土负载磷掺杂二氧化钛的制备及其可见光光催化活性研究.博士学位论文, 吉林大学,2014.
24 Kelly M T, Chun J K M, Bocarsly A B. The Journal of Physical Chemistry B, 1997, 101(14),2702.
25 Papp J, Soled S, Dwight K, et al. Chemistry of Materials, 1994, 6(4), 496.