Multifunctional photothermal materials based on natural pumices for high efficiency solar‐driven interface evaporator. (26th July 2021)

• Record Type: Journal Article
• Authors: Li, Jiyan; Jing, Yanju; Zhou, Xu; Mao, Jialong; Chen, Yujie; Sun, Hanxue; Deng, Xiaofeng; Gao, Chengzhi
• Is Part Of: International journal of energy research. Volume 45:Number 14(2021)
• Page Start: 20132
• Page End: 20142
• Publication Date: 2021-07-26
• Subjects: bacteriostasis -- degradation of color dye -- inhibition of algae -- multifunctional photothermal materials -- solar steam generation; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.7090
• Languages: English
• ISSNs: 0363-907X

Abstract

Summary: The application of solar‐driven interface evaporation photothermal materials in the complex water environment is facing great challenges, and the development of multifunctional photothermal materials is great significance to the practical application process. In this study, a new kind of photothermal material was first prepared based on the natural pumices, which shows great advantages of lightweight, superhydrophilicity, porous property, and heat insulation. To improve its light absorption capacity and photocatalytic effect, carbon and Ag + were uniformly loaded on pumices (named P‐C‐Ag + ). The as‐resulted P‐C‐Ag + shows an evaporation rate of 1.395 kg m −2 h −1 which refers to an evaporation efficiency of 88.80% in simulated seawater under 1 kW m −2 illumination. In the rooftop experiment, the cumulative evaporation capacity of the simulated solar evaporator with P‐C‐Ag + in 8 hours can reach about 7.25 kg m −2 . Meanwhile, almost no salt crystallization was found in the surface of P‐C‐Ag + during the continuous evaporation process. The P‐C‐Ag + has a good inhibitory effect on Escherichia coli and algae, and can degrade color dyes, which is also beneficial to water environment, thus holding great potential as multifunctional photothermal material for solar steam generation and water treatment. Abstract : We demonstrate for the first time the exploitation of a new kind of photothermal material based on the natural pumices, which were uniformly loaded carbon and Ag+ (P‐C‐Ag+) for salt‐rejection solar steam generation. The P‐C‐Ag+ has a good inhibitory effect on Escherichia coli and algae, and can degrade color dye, which is also beneficial to the water environment.