A high-efficiency geopolymer-based 3D photoevaporation membrane enhances evaporation by using low temperature waste heat. (June 2022)

• Record Type: Journal Article
• Authors: Deng, Xingfa; He, Yan; Pan, Dongyu; Zhang, Baoxin; Cui, Xuemin
• Is Part Of: Materials today energy. Volume 26(2022)
• Publication Date: 2022-06
• Subjects: rGO -- Waste heat enhancements -- Desalination -- High salt wastewater; Energy development -- Periodicals; Energy industries -- Periodicals; Power resources -- Periodicals; Energy policy -- Periodicals; Energy development; Energy industries; Energy policy; Power resources; Electronic journals; Periodicals; 621.042
• DOI: 10.1016/j.mtener.2022.101016
• Languages: English
• ISSNs: 2468-6069

Abstract

Abstract: Solar-driven interfacial photoevaporation is considered an environmentally friendly and sustainable freshwater production technology. The preparation of an efficient photoevaporator has recently become a popular research topic. In this paper, a low-cost and high-efficiency three-dimensional inorganic membrane for photoevaporation-based desalination, a 3D-G/rGO evaporator, was designed and prepared by using a geopolymer film composite with graphene oxide. The membrane consists of inexpensive and environmentally friendly geopolymers as a support for efficient water transport. The graphene oxide membrane provides excellent heat transfer efficiency, which greatly increases the evaporation rate. The 3D-G/rGO evaporator reached an evaporation rate of 2.39 kg/m 2 /h and an evaporation efficiency of 104.6% under a solar intensity of 1 sun. The evaporation rate can be greatly improved under the condition of low temperature waste heat (LTWH) enhancement. Therefore, 3D-G/rGO has great application prospects for photoevaporation-based desalination. Graphical abstract: Image 1 Highlights: The 3D-G/rGO evaporator reached an evaporation rate of 2.39 kg/m 2 /h under a solar intensity of 1 sun. The 3D-G/rGO evaporator has an evaporation efficiency of 104.6% under a solar intensity of 1 sun. The desalination of industrial wastewater by field enhanced photoevaporation device was studied. The evaporation rate of 3D-G/rGO under waste heat enhancement is 1.41 times higher than water under the same conditions.