Enhanced Solar Evaporation Using a Scalable MoS₂‐Based Hydrogel for Highly Efficient Solar Desalination

Abstract

Interfacial photo-vapor conversion has been suggested as a cost-effective and sustainable technology for seawater desalination. However, the conversion performance was still limited by some drawbacks, like salt accumulation and poor mechanical stability. Herein, a scalable MoS 2 -based porous hydrogel (SMoS 2 -PH) with good mechanical stability and salt resistance was successfully constructed through a crosslinking foaming polymerization method. With the high porosity (92.63 %), the SMoS 2 -PH performed an impressive evaporation rate of 3.297 kg m À 2 h À 1 and photothermal conversion efficiency of 93.4 % under 1-sun illumination. Most importantly, the SMoS 2 -PH could maintain high and stable photothermal properties for 15 days on the surface of seawater. We believe that the excellent salt resistance, the high photothermal conversion efficiency, the ease of scale preparation method and the available commercial MoS 2 make the SMoS 2 -PH a promising device for full-scale seawater desalination.

Scalable, Green, and Cost-Effective Carbonized Sand for Efficient Solar Desalination

“…The calculated efficiency for the 2D system under 1 sun irradiation is 82%. There is a heat loss in the photothermal conversion process which consisted of (1) radiation heat loss, (2) conduction heat loss, and (3) convection heat loss (Figure a,b) …”

“…There is a heat loss in the photothermal conversion process which consisted of (1) radiation heat loss, (2) conduction heat loss, and (3) convection heat loss (Figure 7a,b). 35 The radiation heat loss (P rad ) can be calculated by the Stefan− Boltzmann law…”

MXene/CdS photothermal–photocatalytic hydrogels for efficient solar water evaporation and synergistic degradation of VOC

“…41 The specific porous structure of hydrogels could also extend the refractive path of the incident light, which is conducive to the aggregation and absorption of light and creates good conditions for evaporation. 30,31 Moreover, the high surface areas of the porous structure enhance the inclusion of organic contaminants in the hydrogels, which usually is required for the improved photocatalytic performance of the MC composite hydrogels. Compared with the smooth surface of the blank hydrogel (Fig.…”

“…Firstly, blank hydrogels (BH) were prepared according to the cross-linked foam polymerization method developed by our research group (Fig. 1), 29–32 without adding Ti 3 C 2 MXene, CdS, and MC. In a typical preparation, 7.2 g of AM and 0.6 g of MBA were dispersed in 20 mL of DIW using ultrasound, first.…”

Hanging Photothermal Fabric Based on Polyaniline/Carbon Nanotubes for Efficient Solar Water Evaporation

“…), carbon-based materials (CNT, − CB, , etc. ), semiconductive materials (MoS 2 , , CuS, , etc. ), and MXene .…”