Developing high-efficiency photothermal seawater desalination devices is of significant importance in addressing the shortage of freshwater.Despite much effort made into photothermal materials,there is an urgent need ...Developing high-efficiency photothermal seawater desalination devices is of significant importance in addressing the shortage of freshwater.Despite much effort made into photothermal materials,there is an urgent need to design a rapidly synthesized photothermal evaporator for the comprehensive purification of complex seawater.Therefore,we report on all-in-one FeOx-rGO photothermal sponges synthesized via solid-phase microwave thermal shock.The narrow band gap of the semiconductor material Fe_(3)O_(4) greatly reduces the recombination of electron-hole pairs,enhancing non-radiative relaxation light absorption.The abundantπorbitals in rGO promote electron excitation and thermal vibration between the lattices.Control of the surface hydrophilicity and hydrophobicity promotes salt resistance while simultaneously achieving the purification of various complex polluted waters.The optimized GFM-3 sponge exhibitedan enhanced photothermal conversion rate of 97.3% and a water evaporation rate of 2.04 kg/(m^(2)·hr),showing promising synergistic water purification properties.These findings provide a highly efficient photothermal sponge for practical applicationsof seawater desalination and purification,as well as develop a super-rapid processing methodology for evaporation devices.展开更多
It is an ideal way to produce clean water after sewage treatment,during which two problems need to be solved:(1)how to deal with water soluble pollutants and surface oil slick;(2)photothermal devices should float on w...It is an ideal way to produce clean water after sewage treatment,during which two problems need to be solved:(1)how to deal with water soluble pollutants and surface oil slick;(2)photothermal devices should float on water.This paper presents a multifunctional water treatment device that can produce clean water vapor under light after sewage treatment.The bismuth oxybromide catalyst degrades water-soluble pollutants under light irradiation.Superhydrophobic(SH)melamine sponge has two functions:selectively adsorb surface oil slick and ensure that photothermal devices float.The hydrophilic layer provides water for local heating of the photothermal layer to produce water vapor.The SH sponge remains stable and is easy to operate during wastewater treatment,and the efficiency of water vapor production through the photothermal device is increased by 7.2 times compared with that of pure water.展开更多
基金supported by the National Natural Science Foundation of China(No.22106105)the Innovation Program of Shanghai Municipal Education Commission(No.2019–01–07–00-E00015)+4 种基金the Shanghai Scientific and Technological Innovation Project(Nos.21DZ1206300 and 19JC1410402)the Scientific and Technological Innovation Team for Green Catalysis and Energy Material in Yunnan Institutions of Higher Learning,General Project of Yunnan Province Science and Technology Department(No.202101BA070001–050)the Central Guidance on Local Science and Technology Development Fund of Shanghai(No.YDZX20213100003002)the Science and Technology Commission of Shanghai Municipality(No.20060502200)the Program for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learning,and Shanghai Sailing Program(No.20YF1432200)。
文摘Developing high-efficiency photothermal seawater desalination devices is of significant importance in addressing the shortage of freshwater.Despite much effort made into photothermal materials,there is an urgent need to design a rapidly synthesized photothermal evaporator for the comprehensive purification of complex seawater.Therefore,we report on all-in-one FeOx-rGO photothermal sponges synthesized via solid-phase microwave thermal shock.The narrow band gap of the semiconductor material Fe_(3)O_(4) greatly reduces the recombination of electron-hole pairs,enhancing non-radiative relaxation light absorption.The abundantπorbitals in rGO promote electron excitation and thermal vibration between the lattices.Control of the surface hydrophilicity and hydrophobicity promotes salt resistance while simultaneously achieving the purification of various complex polluted waters.The optimized GFM-3 sponge exhibitedan enhanced photothermal conversion rate of 97.3% and a water evaporation rate of 2.04 kg/(m^(2)·hr),showing promising synergistic water purification properties.These findings provide a highly efficient photothermal sponge for practical applicationsof seawater desalination and purification,as well as develop a super-rapid processing methodology for evaporation devices.
基金supported by the Natural Science Foundation of Shandong Province(Grant No.ZR2019PA002).
文摘It is an ideal way to produce clean water after sewage treatment,during which two problems need to be solved:(1)how to deal with water soluble pollutants and surface oil slick;(2)photothermal devices should float on water.This paper presents a multifunctional water treatment device that can produce clean water vapor under light after sewage treatment.The bismuth oxybromide catalyst degrades water-soluble pollutants under light irradiation.Superhydrophobic(SH)melamine sponge has two functions:selectively adsorb surface oil slick and ensure that photothermal devices float.The hydrophilic layer provides water for local heating of the photothermal layer to produce water vapor.The SH sponge remains stable and is easy to operate during wastewater treatment,and the efficiency of water vapor production through the photothermal device is increased by 7.2 times compared with that of pure water.
