Rapid Synthesis of Oxygen-Deficient MoO_3–x-rGO Composites for Synergistic Photothermal Seawater Desalination and Photocatalytic Sterilization

Abstract

The development of efficient photothermal desalination devices is of great significance in solving the problem of freshwater shortage. The design and preparation of efficient photothermal materials with a broad light absorption range have been extensively studied. However, the performance of photothermal catalysts for synergistic purification of complex seawater is still facing significant challenges. Therefore, we report the rapid preparation of MoO 3−x -rGO composites with synergistic photothermal and photocatalytic performance by the solid-phase microwave thermal shock method. The superhot spots created on the surface of microwave-reduced rGO induce the formation of MoO 3−x with oxygen vacancies. Due to the localized surface plasmon resonance (LSPR) effect, the near-infrared photothermal and photocatalytic properties of MoO 3−x -rGO catalysts are greatly improved. When the optimal composite catalyst (GMW-3) is illuminated by one sunlight, the seawater evaporation rate and photothermal conversion efficiency can reach 1.58 kg m −2 h −1 and 87.2%, respectively. Meanwhile, the GMW-3 composite evaporator shows excellent antibacterial performance under the synergistic effect of photothermal and photocatalysis during the evaporation process. These findings expand a new insight and platform to design efficient catalysts for large-scale seawater desalination and purification.

All-Biomass-Based Solar Steam Generator with Deep Eutectic Solvent Lignin Porous Carbon/Silver Nanoparticle Coatings for Efficient Water Evaporation

“…There were abundant microorganisms in seawater and other wastewater, including marine fungi and marine bacteria, and most of them could grow at higher salt concentrations . Because of the heating properties of photothermal, a warm environment around the solar evaporator was conducive to the growth of microorganisms . Therefore, a high antibacterial efficiency is required regarding the design of the photothermal materials for long-term solar-driven water purification processes.…”

“…7 Because of the heating properties of photothermal, a warm environment around the solar evaporator was conducive to the growth of microorganisms. 57 Therefore, a high antibacterial efficiency is required regarding the design of the photothermal materials for long-term solar-driven water purification processes. To explore the bacteriostatic performance of the LCDW-1-Ag, representative Escherichia coli and Staphylococcus aureus were selected for the antibacterial assay.…”

Photocatalytic inactivation technologies for bioaerosols: advances and perspective

“…The MoO 3− x -rGO composites with a synergistic photothermal and photocatalytic performance were prepared by the solid-phase microwave thermal shock method. 114 The superhot spots created on the surface of microwave-reduced rGO induce the formation of MoO 3− x with oxygen vacancies. Due to the localized surface plasmon resonance effect, the near-infrared photothermal and photocatalytic properties of MoO 3− x -rGO catalysts are greatly improved.…”

A CuCo Bimetal Confined Hollow SiC Hybrid Photothermal Nanoreactor for the Integration of Pollutant Mineralization and Solar‐Powered Water Evaporation

“…Supporting Information Summary [54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70][71] The detailed experimental section (catalyst preparation and performance test methods), some of the relevant characterization and performance results for the catalysts, a series of tables and additional references are shown in the supporting information.…”