SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Gongduan Fan,Xia Li,Jiuhong Lin,Xinyi Wu,Ling Zhang,Jiaxin Wu,Yingmu Wang
In this work, a facile separation of self-floating Ag 3 VO 4 /BiVO 4 hydrogel (ABVH) photocatalyst was constructed via the freeze-thaw method for the inactivation of Microcystis aeruginosa . The as-synthesized photocatalyst exhibited excellent photocatalytic performance, resulting in the degradation efficiency of chlorophyll a reaching approximately 99.6% within 4 h under visible light. The cell morphology, intracellular organic matter (IOM), extracellular organic matter (EOM), and antioxidant system were severely disrupted during the photocatalytic process. The inactivation mechanism could be ascribed to the ·OH and h + generated by hydrogel photocatalyst under visible light irradiation. Furthermore, five repetitive experiments and cyclic compressive stress-strain tests demonstrated that the as-prepared hydrogel possessed excellent reusability and mechanical strength properties. Besides, the hydrogel photocatalyst showed excellent potential for the removal of M. aeruginosa in the presence of natural organic matter (NOM). Overall, the synthesized self-floating hydrogel photocatalyst may offer a novel insight into the control of harmful cyanobacterial blooms.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Liangri Ying,Fei Liang,Zhen Huang,Jing Ding,Weilong Wang,Shule Liu,Jianfeng Lu
Solar-driven steam generation is widely considered as a promising strategy for desalination. However, before this technology can be practically implemented, certain challenges such as suboptimal steam generation rates and inevitable salt deposition need to be addressed. In this study, we propose a novel bilayer structure aerogel (MS-aerogel), which confines urchin-like MoS 2 /Mo 5 N 6 /C in a biomass gelatin substrate to achieve high-efficiency desalination in high concentration brine solutions. The urchin-like MoS 2 /Mo 5 N 6 /C that hybrid semiconductor MoS 2 , plasmonic Mo 5 N 6 and porous carbon performs superior light-to-heat conversion performance to its individual components. Additionally, under the collaborative action of hydrophilic groups and unique nanostructured surface, the MoS 2 /Mo 5 N 6 /C exhibits a notable reduction in interface evaporation enthalpy from 2405.8 to 1694.6 J g −1 . Taking into consideration the comprehensive thermal management performance, the self-floating MS-aerogel achieves an excellent evaporation rate of 1.89 kg m -2 h −1 under one sun irradiation. Furthermore, the vertically aligned vessels present in the MS-aerogel facilitate salt transportation, effectively preventing crystalline salt accumulation on the evaporator surface. Consequently, even after continuous 12 h desalination in 20 wt% brine, the MS-aerogel maintains an outstanding evaporation rate of 1.54 kg m -2 h −1 , surpassing most reported self-floating evaporators. This research offers a valuable reference for the design of high-efficiency and salt-resistant solar evaporators.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Zhaoxin Li,Wei Cai,Xin Wang,Yuan Hu,Zhou Gui
Efficient solar vapor generation has provided a feasible way to solve the water shortage in undeveloped and arid areas. However, some photo-thermal materials need additional large-volume support materials being harmful to carry around to obtain float capacity, while suppressing the solar steam generation. Herein, the decrease approach of surface tension was presented for solving the moist-environment degradation behavior of black phosphorus (BP) nanosheets and obtaining the self-floating capacity, thus applying BP nanosheets in solar vapor generation field. With the in situ cross-linking polymerization, trichloro(1H,1H,2H,2H-perfluorooctyl) silane successfully modified BP nanosheets (F-BP). Due to the significantly decreased surface tension, F-BP nanosheets are capable of self-floating easily on water surface and spreading out spontaneously. With assistance of desirable photo-thermal conversion capacity, self-floating BP nanosheets convert the incident photon into local heat, showing excellent vapor generation performance. With simulated sun illumination (1 kW/m 2 ), 238.7 g/m 2 BP nanosheets present the evaporation rate of ~0.9437 kg/(m 2 ·h) and efficiency of ~64.63 ± 2.3%. Meanwhile, the super-hydrophobicity successfully imparts BP nanosheets with resistance to the deterioration caused by salt precipitation. The carriable F-BP nanosheets are an ideal photo-thermal convertor to produce drinking water , successfully providing a feasible way to solve water shortage in limited condition.
研究领域:
材料科学
·
能源科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ke Liu,Juan Yang,Jiale Liu,Qin Shuai,Yusuke Yamauchi,Minsu Han,Lijin Huang
Covalent organic framework (COF) aerogels have attracted significant interest due to their broad range of potential applications. However, synthesizing COF aerogels with tailored structures and robust mechanical stability remains a formidable challenge. In this work, we present a double-cross-linking strategy to prepare a series of compressible COF/chitosan (COF/CS) aerogels under mild conditions. By harnessing chemical cross-linking and physical interactions, such as electrostatic and hydrogen bonding, ionic COF powders containing sulfonic acid groups ( i.e. , TpPa-SO 3 H) are immobilized and connected with CS, forming a three-dimensional interconnected network. Impressively, the ratio of COF to CS and the size of the COF/CS aerogels can be easily controlled by adjusting the processing parameters. The resulting COF/CS aerogels possess a highly porous structure and low density, enabling the aerogels to self-float and facilitating practical applications and recycling. Due to these remarkable characteristics, TpPa-SO 3 H/CS aerogel demonstrates excellent adsorption capacity, effectively removing sulfamerazine from aqueous solutions with an adsorption capacity of 102.5 mg·g −1 . Moreover, the aerogel can be reused in three adsorption–desorption cycles without significant capacity loss. This proposed method offers a facile, eco-friendly, and scalable approach for producing highly compressive COF-based aerogels, thereby accelerating the practical utilization of COFs and contributing to environmental remediation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ning Ding,Jijia Zhu,Yibo Qiao,Dahu Yao,Xiping Gao,Jing Chen,Chang Lu,Xinchang Pang
Solar-driven interfacial evaporation (SDIE) technology offers a sustainable solution for freshwater generation. However, the high thermal management demands of SDIE lead to complex evaporator structures, increasing engineering challenges. Moreover, maintaining a high evaporation rate in all-weather remains a significant issue. In this study, A Janus-structured hydrogel with a porous hydrophobic interior and a dense hydrophilic surface was fabricated. The hydrophobic interior enables the hydrogel to self-float on water, providing excellent thermal insulation through enclosed air. The hydrophilic surface layer forms a two-dimensional water transport channel that limits heat transfer to the water body. The excellent thermal management allows the self-floating evaporator to achieve an evaporation rate of 2.35 kg·m - 2 ·h - 1 under 1 sun. The arch-shaped structure further boosts the evaporation rate to 3.48 kg·m - 2 ·h - 1 and ensures high evaporation rates under varying solar angles and intensities. At a low incident angle of 30°, the evaporation rate is 3.26 kg·m - 2 ·h - 1 , only 6.3 % lower than at 90°. Under low light intensity (0.3 sun), the evaporation rate reaches 1.51 kg·m - 2 ·h - 1 . The evaporator also demonstrates excellent compressive strength and antibacterial properties, showing great potential for seawater desalination.
研究领域:
材料科学
·
环境工程
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2022
·Vol. 30
·期 1
·1-11
·
IF 3.061
Guo Ying,Wan Ying,Zhang Yang,Pan Guoyuan,Wang Jing,Yu Hao,Du Xueli,Zhao Muhua,Zhao Guoke,Li Yu,Liu Yiqun
The scarcity of freshwater is one of the challenges faced by humanity today. Solar desalination technology is gaining increasing attention due to its environmental friendliness and sustainability. However, the service life of the evaporator is significantly reduced by the problem of salt deposition during the evaporation process. In this work, a porous Janus evaporator with asymmetric wettability was fabricated using an atomization-assisted non-solvent induced phase separation method. The bottom surface of the Janus evaporator was fabricated with polyacrylonitrile and polyvinylpyrrolidone, working as capillary "pumps" to ensure adequate water supply. The upper surface was made of polyvinylidene fluoride which endows the evaporator with self-floating properties and the addition of CNTs improves its solar-to-vapor conversion efficiency. The micro-nano composite continuous porous structure of the Janus evaporator is beneficial to the enhancement of the capillary action, leading to good salt-repellent performance. The solar-to-vapor efficiency of the seawater desalination experiment under 1 kW·m −2 of sunlight was 81.61%, and the water evaporation rate was 1.30 kg·m −2 ·h −1 . In addition, the evaporator exhibited excellent stability under multiple cycles. It also functioned well in the treatment of organic wastewater. This work provides a novel method for preparing solar desalination materials.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Lixin Zhang,Lei Rao,Peifang Wang,Zhenyu Shi,Pingfan Wang
Semiconductor photocatalysis is as a promising method for water pollution remediation. However, the recycling and light capture of powder photocatalysts in traditional suspension systems are bottlenecks for their practical application in photocatalysis. Moreover, the large-scale application of traditional immobilized photocatalytic systems immersed in solution is limited due to the electron-hole recombination and slow reaction rate. Herein, we have successfully prepared superhydrophobic self-floating TiO 2 -silicone composite aerogels by condensation polymerization of γ-methacryloxypropyl trimethoxysilane (KH570) modified anatase TiO 2 and methyltriethoxysilane (MTES). The air–liquid-solid triphase photocatalytic system was constructed using the air layer formed by the superhydrophobic self-floating composite aerogel and the solution interface, which solved the above-mentioned limitation. The floating characteristics of the system effectively avoided the absorption of light by the solution, thereby significantly enhancing the light utilization of the catalyst. The air–liquid-solid interface allows oxygen to be quickly transported from the air to the reaction interface, and oxygen, which is a natural electron scavenger, can effectively remove photoelectrons from the catalyst surface and the recombination of electron-holes is minimized. The new self-floating photocatalyst with triphase catalytic system presented high practical application value for the degradation of suspended pollutants in a natural environment.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Dingqiang Zheng,Lei Shi,Ming Zhang,Weixing Huang,Zhenghui Li,Shoufu Long,Dongsheng Song
To alleviate the global freshwater crisis, a self-floating magnetic Janus biomass composite hydrogel has been fabricated through a rational asymmetric bilayer structure design, which exhibits many merits such as remarkable light-absorption, photothermal conversion, water-evaporation, salt rejection, wind-resistant, etc. Specifically, sodium alginate, cellulose nanofibrils (from corn straw), and acrylic acid were crosslinked by triple interpenetrating networks (chemical cross-linking, ionic cross-linking and hydrogen bonding). Janus hydrogel evaporator was constructed by incorporating the top layer containing light-absorbing core–shell magnetic nanoparticles (Fe 3 O 4 @PDA NPs), and the bottom layer composed of self-floating foam gel due to the addition of foaming agent. Under one solar irradiation, the average evaporation rate and photothermal conversion efficiency of Janus biomass composite hydrogel reached 2.89 ± 0.09 kg·m −2 ·h −1 and 95.66 ± 2.68 %, respectively. Its evaporation stability and salt tolerance capability have been demonstrated by extended period of simulated desalination. Furthermore, Janus biomass composite hydrogel also had excellent mechanical property (ultimate stress of 1.6 MPa) and magnetic performance, which can not only effectively resist the stress induced by wind and waves, but also enable the magnetic maneuvering and wind-resistance floating on the sea. When the input voltage of electromagnet was 24 V, the furtherest response displacement and maximum resisted wind speed were 9 cm and 7.2 m/s, respectively. Therefore, such magnetic self-floating Janus biomass composite hydrogel serving as interfacial solar-driven evaporator system offers a green, efficient and sustainable solution for clean freshwater production.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Qidong Zha,Zuozhu Yin,Guoyan Yang,Rirong Wang,Yu Xie,Yuhua Chen,Zhen Hong,Yidan Luo,Mingshan Xue
Solar-driven interfacial steam generation (SISG) has emerged as a promising candidate for addressing water scarcity issues, functioning as a clean water production process with zero carbon emissions. However, there is a lack of an ‘integrated system’ that simultaneously meets requirements for self-floating, salt resistance, and anti-biofouling during evaporation, while also removing pollutants (such as waste oil and heavy metal ions) from the water source environment. This research describes the sequential polymerization of aniline and dopamine-carbon black on the surface of polyurethane sponge, ensuring rapid water supply and strong photothermal conversion capability. The rich functional groups on its surface provide strong adsorption capacity for heavy metal ions. By further micro-modifying its surface with polydimethylsiloxane and carbon black, a unique 3D Janus structure was designed for the SISG, ensuring effective thermal insulation, salt resistance, and high buoyancy. Consequently, this evaporator achieves a maximum evaporation rate of 2.32 kg·m −2 ·h −1 , and its excellent hydrophobic properties confer high efficiency for oil–water separation (>95.5 %) and anti-biofouling (chlorella) capability. This ‘integrated system’ offers a unique strategy for addressing the accumulation of pollutants in solar evaporation processes.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）