DESALINATION
·
2022
·
IF 11.211
Shaoan Cheng,Yihang Li,Beichen Jin,Zhen Yu,Ruonan Gu
Solar-driven passive multistage distillation (MSD) device provides a new approach for environmentally friendly freshwater production. However, the MSD device easily forms salt crystals on the evaporation surface when treating brine, resulting in performance degradation . Here, we design an MSD device with an effective salt-resistant structure to enable rapid and automatic removal of high-concentration brine by a gravity drive. The structure was optimized by laboratory experiments and simulation. As a result, the stable freshwater production rate of the 4-stage device can reach 1.98 kg m −2 h −1 under a 1 kW m −2 light intensity . In particular, the MSD device can work stably at a high light intensity of 4 kW m −2 with an evaporation rate of 8.26 kg m −2 h −1 , making its freshwater yield more than 1.7 times higher than that of a device without a salt-blocking structure. In summary, we explored a new method for salt removal in MSD devices, which is a meaningful method for long-term seawater desalination .
研究领域:
环境科学
·
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Chuanling Zhou,Qiuyu Mei,Limingming Huang,Tingting Mao,Shuangfu Li,Zhian Wang,Hua Wan,Hui Gu,Kai Han
Photothermal conversion materials are critical in the development of solar-driven interfacial evaporation techniques; however, achieving a high energy conversion efficiency remains challenging owing to the high cost and instability of light-absorbing materials, in addition to the difficulties of simultaneously improving light absorption while suppressing heat loss. A black silicon (Si) powder with a porous structure was prepared by chemical etching of a low-cost commercial micron-sized Al–Si alloy, and a flexible Janus black Si photothermal conversion membrane was constructed. The partially broken spherical particles and porous structure obtained after etching enhanced the refraction of light from the Si powder, imparting the prepared membrane with an average light absorption rate of 95.95% over the solar spectrum. Evaporation from the membrane increased the intermediate water content and reduced the equivalent evaporation enthalpy. The thermal conduction loss was inhibited through a one-dimensional water transport structure, and the membrane achieved a water evaporation rate of 2.17 kg m–2 h–1 and a photothermal efficiency of 94.95% under 1 sun illumination. Benefiting from the broadband absorption and high photothermal efficiency of black Si powder, surface modification of hydrophobic polydimethylsiloxane, and directional salt-out structure design, the evaporation rate of the Janus black Si membrane-based system in a 10% NaCl solution was maintained >2.10 kg m–2 h–1 after 7 days of continuous evaporation cycles. The removal rate of metal ions from simulated seawater and from practical wastewater containing complex heavy metals reached >99.9%, indicating the promising potential of black Si membrane for application in solar-driven interfacial water purification.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Chenglong Qin,Tingting Ren,Chengxiang Gui,Peng Liu,Qingjiao Wei,Wenjing Liu,Zuwei Zhou,Yaning Huang,Kun Fan,Lu Huang
Solar-driven photocatalytic hydrogen production is considered to be a reliable, simple and effective technology for producing green hydrogen. However, a large amount of solar energy absorbed by the photocatalyst material is not utilized but directly dissipated into the atmosphere in the form of waste heat. Meanwhile, the dependence of photocatalytic hydrogen production system on the water supply chain also limits its promotion in water-scarce and arid areas. Herein, a solar-driven hydrogen and water co-generation (SHWC) device based on atmospheric water harvesting (AWH) technology is proposed. The integrated device consists of a water self-supply layer (WSL) and a photocatalytic layer (PL) for simultaneous hydrogen production and freshwater harvesting from the atmosphere. Under one sun illumination (1000 W m −2 ), the AWH-SHWC device obtains an average hydrogen production rate of 25.98 mmol m -2 h −1 with 81.78 g m -2 h −1 of condensate water. In the natural sunlight, 118.21 mmol m −2 day −1 of hydrogen production and 230 g m −2 day −1 of condensate water are obtained. At night, the WSL can achieve regeneration by adsorbing atmosphere water. This integrated device may offer a creative approach to addressing freshwater resource scarcity and the fossil energy crisis.
研究领域:
能源科学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zixuan Liu,Junhui Li,Yongxu Liu,Qi Sun,Dengchao Liang,Xuan Yang,Wenwen Zhao,Yafang Zhang,Hong Liu,Jiebing Tang,Weijia Zhou,Guobin Xue
Saline soil remediating is crucial to enhance arable land and address the global food crisis. One of the great challenges is to develop low-cost and effective technology to directly extract salt from saline soil. Herein, we designed a biomimetic solar-driven salt extractor to extract the salt from saline soil with the fact that the salt will migrate along with water flow during evaporation process. A salt-resistant polyacrylic acid sodium hydrogel was used as the evaporator to ensure prolonged stable operation and salt was enriched in a cotton fabric beneath the evaporator. In one desalination cycle of 10 days under one solar irradiation, the soil salinity was reduced from 27 g kg −1 to 1.4 g kg −1 , thereby meeting the requirements for normal agricultural crops. Under outdoor conditions, similar salt extraction process could be reduced to 7 days with a desalination efficiency of 95.2 %, and the desalted soil could be used to plant ryegrass. We envisioned that such a high-efficiency solar-driven salt extraction strategy could have great potential application in saline land remediation.
研究领域:
环境科学
·
农学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Youyuan Xu,Yakun Tang,Lang Liu,Yue Zhang,Caixia Zhu,Xiang Bai,Zhiguo Li,Zhiwei Zhang,Biao Zhang,Sen Dong
Solar-driven interfacial evaporation is an environmentally friendly technology to address the global water scarcity crisis by efficiently purifying unavailable water resources (seawater, brackish water, high salinity wastewater and various water resources). However, the inevitable contradiction between salt deposition and highly efficient water evaporation during long-term desalination remains a major challenge. In this work, we report a self-floating bionic water lily evaporator with zero liquid discharge, consisting of CNT@cotton towel with the uneven-gap structure as the photothermal material and the square groove insulation foam with controllable water supply as edge-preferred crystallization support. The formed four-building-in ramp structure generates different surface tensions along the whole ramp and brings Marangoni flow. With the combination of Marangoni flow and optimal water supply volume, salt is spatially isolated from the CNT@CT surface, the biomimetic design can achieve continuous water evaporation and salt collection (79 g m -2 h −1 ) for 84 h in 10 wt% NaCl under edge-preferred crystallization. The purified water meets drinking water standards and is applied to growing crops. This distinctive solar evaporator provides new insights for designing a low-cost and zero-liquid-discharge evaporator, advancing its application in high-saline brines, various water resources, and irrigation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Weixiong Dong,Tiantian Ren,Haiyan Tao,Shuping Jia,Guihua Meng,Jianning Wu
In recent years, solar-powered highly hygroscopic lithium chloride-modified gels were developed based on adsorptive atmospheric water harvesting (SAWH), an attractive method for obtaining fresh water from the atmosphere. In order to enrich the atmospheric water collection materials and obtain high-performance atmospheric water collection materials, an SAWH composite material, LiCl (PAA-CMC-Na/DA-rGO@LiCl), with high efficiency, high stability, and low energy consumption has been designed and successfully prepared. The material consists of sodium carboxymethyl cellulose (CMC-Na) with high swelling performance and acrylic acid (AA) as the hydrophilic hydrogel network, dopamine-reduced graphene oxide (DA-rGO) as the solar-thermal conversion medium, and high hygrometric lithium chloride (LiCl) as the hygrometric salt at low relative humidity (RH). A high water adsorption performance was obtained, with a water adsorption capacity of 0.819–3.019 g·g–1 after 12 h under a wide humidity range of 30%–90% RH. At 1 kW·m–2 light illumination (1 kW·m–2 is proportional to 1 sun), the surface temperature of the gel reached 69.5 °C after 60 min, and 79.1% of the adsorbed water was released, showing good solar-thermal conversion and water desorption performance. The material was cycled 10 times, which proved that the composite hydrogel had good performance stability.
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
INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Xueteng Zhu,Hexia Deng,Gang Cheng
Photocatalytic reduction of CO 2 into fuels is a promising approach to address the energy crisis and global warming issues. In this work, g-C 3 N 4 -W 18 O 49 nanocomposite material was constructed by a simple solvothermal method. The W 18 O 49 nanorods have a good dispersion by coupling with the g-C 3 N 4 sheet. Under simulated sunlight irradiation, the g-C 3 N 4 -W 18 O 49 nanocomposite exhibited superior photocatalytic CO 2 reduction capability than that of g-C 3 N 4 and W 18 O 49 . The photo/electrochemical measurements demonstrated that the g-C 3 N 4 -W 18 O 49 heterojunction could accelerate the separation and migration of charge carries, thus improving the activity of photocatalytic reduction of CO 2 into CH 4 and CO.
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
Small
·
2024
·Vol. 20
·期 38
·2402863
·
IF 13
Nan He,Xisheng Sun,Haonan Wang,Bingsen Wang,Dawei Tang,Lin Li
Facing the increasing global shortage of freshwater resources, this study presents a suspended multilayer evaporator (SMLE), designed to tackle the principal issues plaguing current solar-driven interfacial evaporation technologies, specifically, substantial thermal losses and limited water production. This approach, through the implementation of a multilayer structural design, enables superior thermal regulation throughout the evaporation process. This evaporator consists of a radiation damping layer, a photothermal conversion layer, and a bottom layer that leverages radiation, wherein the bottom layer exhibits a notable infrared emissivity. The distinctive feature of the design effectively reduces radiative heat loss and facilitates dual-interface evaporation by heating the water surface through mid-infrared radiation. The refined design leads to a notable evaporation rate of 2.83 kg m −2 h −1 . Numerical simulations and practical performance evaluations validate the effectiveness of the multilayer evaporator in actual use scenarios. This energy-recycling and dual-interface evaporation multilayered approach propels the design of high-efficiency solar-driven interfacial evaporators forward, presenting new insights into developing effective water-energy transformation systems.
研究领域:
材料科学
·
能源技术
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zhiheng Zheng,Huan Liu,Dezhen Wu,Xiaodong Wang
Aiming to explore a high-efficient seawater desalination technique based on solar photothermal energy as the cleanest and most abundant renewable energy source, we developed a novel type of phase-change composites based on a polyimide (PI)/MXene hybrid aerogel as a supporting material and polyethylene glycol (PEG) as a phase change material. The introduction of Ti 3 C 2 T x MXene nanosheets as a high-efficient sunlight absorber not only significantly enhanced solar photothermal energy-conversion efficiency up to 87.28% for the aerogel/PEG composites, but also improved the volume capacity of the hybrid aerogels. This resulted in an extremely high PEG loading rate of up to 97.68 wt% and a high enthalpy efficiency of up to 95.16%. The hybrid aerogel/PEG composites also exhibit an outstanding thermal energy-storage capability under a high latent heat capacity of over 170 J·g −1 , high thermal cycle stability, good leakage-resistant performance, excellent thermal impact resistance, and good shape/form stability to deal with the use in seawater desalination. More importantly, the hybrid aerogel/PEG composites show a high seawater evaporation mass of 6.07 kg·m −2 , a high evaporation rate of 1.24 kg·m −2 ·h −1 under one-sun illumination, and a high evaporation efficiency of 50.6% when used in a solar-driven evaporation device. The PI/MXene hybrid aerogel/PEG composites developed by this work exhibit a great potential for application in sustainable seawater desalination.
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
Nanoscale
·
2014
·Vol. 6
·期 17
·10216-10223
·
IF 6.739
Huaqiao Tan,Zhao Zhao,Mang Niu,Chengyu Mao,Dapeng Cao,Daojian Cheng,Pingyun Feng,Zaicheng Sun
Colored TiO2 has attracted enormous attention due to its visible light absorption and excellent photocatalytic activity. In this report, we develop a simple and facile solid-state chemical reduction approach for a large-scale production of colored TiO2 at mild temperature (300–350 °C). The obtained sample possesses a crystalline core/amorphous shell structure (TiO2@TiO2−x). The oxygen vacancy results in the formation of a disordered TiO2−x shell on the surface of TiO2 nanocrystals. XPS and theoretical calculation results indicate that valence band tail and vacancy band below the conduction band minimum appear for the TiO2−x, which implies that the TiO2@TiO2−x nanocrystal has a narrow band gap and therefore leads to a broad visible light absorption. Oxygen vacancy in a proper concentration promotes the charge separation of photogenerated carriers, which improves the photocatalytic activity of TiO2@TiO2−x nanocrystals. This facile and general method could be potentially used for large scale production of colored TiO2 with remarkable enhancement in the visible light absorption and solar-driven H2 production.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 69
·36665-36670
·
IF 3.708
Juan Feng,Junxue Liu,Guijuan Wei,Jun Zhang,Shutao Wang,Zhaojie Wang,Changhua An
Hollow CdS nanostructures have been synthesized by a two-step ionic exchange route, which consists of a first synthesis of Ag2S intermediated hollow frames derived from the reaction of S2− ions with AgCl cube-tetrapods, and a subsequent ion-exchange conversion of the obtained Ag2S to CdS hollow nanoframes. The investigation of the corresponding transformation process with scanning electronic microscopy (SEM) revealed that the obtained CdS particles preserved the framework of the original template. The solar-driven hollow structured CdS modified with 5% (w/w) of promoter of Pt nanoparticles/nanoclusters manifested a high hydrogen evolution rate of 10.07 mmol h−1 g−1, corresponding to the apparent quantum yield of 9.6% measured at a single length of 435 nm, which is due to efficient charge separation, fast transport of the photogenerated carriers, and fast photochemical reaction at the CdS/Pt/electrolyte interfaces. The present work can benefit the development of other hollow structured nano-photocatalysts with high efficiency towards new energy applications.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Materials
·
2022
·Vol. 6
·期 3
·e12353
·
IF 13.443
Boqiu Luo,Jin Wen,Hao Wang,Size Zheng,Rui Liao,Wenjing Chen,Omid Mahian,Xiaoke Li
Solar-driven hydrogel evaporator used for water purification demonstrates great potential in seawater desalination and domestic sewage treatment. However, much uncertainty still exists about the most efficient design to obtain cost-effective drinkable water. In this paper, a natural rich biomass Nicandra physalodes (Linn.) Gaertn. polysaccharide was introduced into the polyvinyl alcohol network to control the water distribution during evaporation and build a low-cost hybrid hydrogel solar evaporator with a total material cost of $7.95 m −2 . The mixed evaporator works stably in a long-span acid–base range (pH 1–14) and salinity range (0–320 g kg −1 ). Its daily water purification capacity can reach 24.4 kg m −2 with a water purification capacity of 3.51 kg m −2 h −1 under sunlight. This paper provides a new possibility for a highly efficient and cost-effective water desalination system with guaranteed water quality by focusing on the dynamic regulation of water molecules at the evaporation interface.
研究领域:
材料科学
·
环境科学
·
生物化学
✓ 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）