DESALINATION
·
2022
·
IF 11.211
Lu-Ri Bao,Jing-Ze Zhang,Wei-Ping Tang,Shu-Ying Sun
The Mn-based Li 1.6 Mn 1.6 O 4 ion sieve is among the most effective lithium adsorbents due to its high lithium-ion adsorption capacity and selectivity for Li-ions. However, the inherent disadvantages of manganese dissolution and low structural stability prevent its industrial application. In this study, a series of Li 1.6 Mn 1.6 O 4 @R were synthesized by the low temperature solid phase hydrothermal method that exhibit highly anti-dissolution properties for the lithium adsorption from brine water. The LMO-L, LMO-LM, and LMO-M adsorbents show great adsorption capacities of 46.0 mg g −1 , 43.0 mg g −1 , and 38.0 mg g −1 compared to the 42.3 mg g −1 for the pristine adsorbent. After 20 cycles the dissolution loss of Mn was 0.06 % of LMO-L adsorbents. This improvement in adsorption properties is attributed to the stabilized layered structure due to the evolution of oxygen during the coating reaction, and the inhibition of the interfacial side reactions between the solution and the adsorbent by metal oxide coating. X-ray diffraction, and X-ray photoelectron spectroscopy analysis indicate the formation of Li 2 MnO 3 on the material surface, which can increase tetravalent manganese on the surface. Furthermore, our work may provide new insights for the design of efficient Mn-based adsorbents with high stability for water treatment applications.
研究领域:
材料科学
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环境科学
·
化学工程
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2025
·
IF 2.7
Zhicheng Wu,Xiang Li,Zhiyong Lv,Bo Liu,Siyang Chen,Qiaogen Zhang
Real-time and accurate detection of moisture content in insulating oil is crucial for the safe operation of oil-filled electrical equipment. This study presents a method for preparing hydrophobic porous PI films for moisture sensing using supercritical CO 2 foaming (SCF) technology. The resulting porous PI films have a uniform and dense nanometer-scale microporous structure, with a water contact angle of 111.7°, indicating strong hydrophobicity and enabling the mitigation of hysteresis-induced measurement inaccuracies. Compared to sensors made using traditional methods such as non-solvent induced phase separation (NIPS), the moisture sensors fabricated using this method exhibit a response time of 10 s, with humidity hysteresis reduced from 9.1 %RH to 2.3 %RH, achieving both fast response and low humidity hysteresis. This method also holds broad application prospects in areas such as permeation membranes and energy.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Siyuan Li,Yi Jiang,Wenchao Jiang,Yu Zhang,Kai Pan,Song Wang,Chongyang Hu,Lu-Hua Zhang,Lixin Xia
Constructing a heterojunction photoelectrode is an effective way to promote the photogenerated charge separation in photoelectrochemical (PEC) water oxidation. In this work, we successfully fabricated C 3 N 4 /BiVO 4 hybrid electrodes by integrating g-C 3 N 4 onto the nanoporous BiVO 4 via a simple in-situ synthesis method. The as-prepared C 3 N 4 /BiVO 4 photoanodes were systematically studied by Electrochemical Impedance Spectroscopy, steady-state surface photovoltage (SPV), transient SPV, Open circuit potential and Photoluminescence measurements. With an optimal loading of g-C 3 N 4 , the 2-C 3 N 4 /BiVO 4 electrode showed a high photocurrent density of 4.06 mA/cm 2 at 1.23 V (vs. RHE) for water oxidation, a 2.8 times enhancement over that of the BiVO 4 . It is found that g-C 3 N 4 improved the PEC performance of the photoanodes by simultaneously promoting the charge separation and surface reaction kinetics. When a NiOOH co-catalyst was immobilized onto the 2-C 3 N 4 /BiVO 4 electrode, both the PEC property and stability of the photoanode were enhanced. An extremely high photocurrent density of 5.44 mA/cm 2 at 1.23 V was achieved. The largest half-cell solar energy conversion efficiency for NiOOH/2-C 3 N 4 /BiVO 4 was 1.43% at 0.78 V, corresponding to 8.4 times that of unmodified BiVO 4 (0.17% at 0.97 V). This work brings new insight into the development of C 3 N 4 -based devices for application in solar to fuel conversion.
研究领域:
材料科学
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能源转换
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2024
·
IF 2.2
Qiang Zheng,Fuxin Yang,Houzhang Tan,Xiaopo Wang
Deep eutectic solvent (DES) shows excellent absorption performance in the field of CO 2 capture. It is considered as a new green absorption solvent to replace monoethanolamine. In the industry, the presence of water not only affects the structural stability of the solvent, but also affects its thermophysical properties. In this work, three kinds of hydrophobic DES were prepared. Based on the study of their structural characteristics and thermal stability, the density and viscosity of DES with water mixture were measured in the temperature range of 298.15 ∼ 338.15 K at atmospheric pressure. It was demonstrated that the trace water did not destroy the structure of DES, but it formed hydrogen bonds with DES. The increase water destroyed the structure of DES and formed hydrogen bonds with hydrogen bond donor (HBD) and hydrogen bond acceptor (HBA), respectively. Moreover, the hard sphere model was applied to study the viscosity, and after introducing the binary interaction parameter, the average absolute relative deviation of the mixture reduced to 4.4 ∼ 7.7 %.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 18
·3069
·
IF 4.329
Xiao Liu,Xiaofei Song,Ziming Wang,Chunlei Xia,Ting Li,Xiaoning Li,Qian Xu,Suping Cui,Shanshan Qian
A series of novel comb-like poly(butyl acrylate)-g-poly(dimethylaminoethyl methacrylate) (PBA-g-PDMAEMA) with different side chain lengths were designed and successfully synthesized by the “first main chain then side chain” method. Infrared Spectroscopy (IR),1H Nuclear Magnetic Resonance (1H NMR), and gel permeation chromatography (GPC) were used for structural confirmation and molecular weight characterization. This polymer exhibited responsive behavior from hydrophilicity to hydrophobicity under the alkaline environment of cement-based materials, with the contact angle of 105.6°, a decreased evaporation rate, and a hydrophile–lipophile balance (HLB) value. A significant internal hydrophobic effect on cement mortar was shown in the water absorption rate, which decreased by 75.2%, and a dry shrinkage-reducing rate of more than 30%. Furthermore, this polymer can effectively slow the exothermic rate, reduce the heat release, and delay the exothermic peak of cement hydration. It was interesting that these properties showed a direct correlation with the side chain length of the comb polymer. The aims of this study are to provide a new avenue to synthesize polymers with the spontaneous hydrophilicity–hydrophobicity transition in the cement system, achieving excellent internal hydrophobicity of cement-based materials, and to offer a promising alternative to resist external erosion for improving the durability and service life of cement-based materials.Keywords:hydrophilicity–hydrophobicity conversion;internal hydrophobicity;molecular design;cement-based material;hydration
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY
·
2020
·
IF 6.082
Xiaoya Zang,Xuebing Zhou,Lihua Wan,Jing Wang,Deqing Liang
Cyclopentane (CP) is an alkane that combines with water to form hydrates. Here, we investigate the hydrate thermal dynamics and formation kinetics of a synthesized ternary gas mixture of CH 4 /CO 2 /N 2 with CP additives. The results indicated that CP shifts the phase equilibrium conditions of ternary gas mixture hydrates to higher temperature and lower pressure. Under a constant pressure, the largest temperature offset can be approximately 20 K. Meanwhile, the ternary gas mixture of CH 4 /CO 2 /N 2 formed structure II hydrates with added CP. The kinetics study indicated that the hydrate reaction started immediately when accompanied by stirring. The consumption of CO 2 gas was greater than that of CH 4 and N 2 . The ratio of the volume of CP to the volume of water had a considerable influence on the effective reaction time, CH 4 recovery factor (R CH4 ), and CO 2 split ratio (S CO2 ) under all experimental conditions. R CH4 and S CO2 were higher when the CP-to-water volume ratio was 0.308. The largest values of R CH4 and S CO2 were 3.098 and 0.908, respectively, when the CP-to-water volume ratio was 0.308 at 7.0 MPa and 280.1 K. These results favor the use of CP as an additive to separate CO 2 and purify CH 4 in gas mixtures.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2021
·
IF 9.501
Zhihui Pan,Haoyong Guo,Huarong Yu,Gang Wen,Fangshu Qu,Tingjian Huang,Junguo He
This work made use of the sewage sludge ash (SSA) to enhance thermo-responsive hydrogel for driving forward-osmosis (FO) process. Results showed that owing to the porous structure and intermolecular interactions between the ionized groups of monomers and the chemical surface of silica , the SSA-based thermo-responsive hydrogel (SSA2.5H) had increased swelling capacity and osmotic pressure , resulting in an average water flux (2.33 LMH) twice as high as the hydrogel without adding SSA (1.18 LMH) during 24 h FO with DI water or different concentrations (2000–8000 ppm) of NaCl as feed solution. More importantly, SSA2.5H can maintain good thermo-responsive dehydration performance in spite of an enhancement to its swelling ability. 93.8% of the adsorbed water can be retrieved from SSA2.5H in water bath of moderate temperature (60 °C) for 10 min and water flux can be recovered to 94.4% of the initial value after 4 times of hydrogel regeneration during FO as draw agent. Therefore, this work showed that SSA was an excellent modifier to enhance the thermo-responsive hydrogel for improving permeation performance in FO and lowering down the actual energy requirement for water recovery and draw agent regeneration.
研究领域:
环境科学
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材料科学
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2021
·
IF 4.094
Rongrong Xue,Gaoxiang Ma,Huifang Ye,Nuo Man,Yuezong Lian,Wangchuan Xiao,Fenghua Chen
Guanosine (GR) dihydrate and inosine (IR) dihydrate have similar crystal structure, water molecules are almost at the same locations in them. GR dihydrate has the reversible dehydration/hydration property and is a good candidate for materials harvesting water from atmosphere. IR dihydrate is not stable and can be easily transformed to anhydrous IR α form. In this work, doping of IR in GR dihydrate in all the range was realized for the first time by using a solution method. The successful preparation of doped dihydrate of IR and GR by the solution method was attributed to the similar molecular conformations of IR and GR in solution. The doped dihydrates could maintain the reversible dehydration/hydration property similar to pure GR dihydrate even the ratio of IR was up to 71.1 ± 1.2 mol% under a mild drying treatment with freeze-dry. A pure amorphous GR was prepared by ball milling, and it showed a similar dehydration/hydration property to GR dihydrate with a lower dehydration temperature (about 84 °C). The implementation of doping IR in GR dihydrate would shed light on the design and fabrication of functional doped organic crystals. And study on the structural insights and the dehydration/hydration processes of the doped dihydrates and the pure amorphous GR would shed light on the design and fabrication of novel hydrogen-bonded organic frameworks (HOFs) materials for water harvesting.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 9
·1531
·
IF 5.719
Xiangcai Ge,Zhijun Zhou,Zheng Tan,Shoufei Wang,Xingchuan Zhao,Guina Ren,Bo Ge,Wei Li
Environmental pollution and clean water production are challenges to the development of human society. In this paper, devices consisting of a superhydrophobic Ni-CoFe2O4foam layer (floating layer), a hydrophilic channel and a superhydrophilic Ni-CoFe2O4foam layer (photothermal conversion layer) were designed. The light energy was converted into heat on the photothermal layer, for which the hydrophilic channel provided a small amount of water. The superhydrophobic layer ensured the floating and selective adsorption of organic solvents on the water surface, whose contact angle reached 157°, and the steam production rate reached 1.68 kg·m−2·h−1. Finally, the LSV curve demonstrated that the Ni-CoFe2O4foam prepared had a minimum starting potential, achieving the multifunctionality of the Ni foam.Keywords:superhydrophobic;oil–water separation;clean water production
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biomimetics
·
2022
·Vol. 7
·期 4
·177
·
IF 3.743
Feiran Li,Jian Wang,Zhuochao Wang,Dongchao Ji,Shuai Wang,Pengcheng Wei,Wenxin Cao
Effective integrated methods for oil-water separation and water remediation have signifi-cance in both energy and environment fields. Materials with both superlyophobic and superlyophilic properties toward water and oil have aroused great attention due to their energy-saving and high-efficient advantages in oil-water separation. However, in order to fulfill the superlyophobicity, low surface tension fluorinated components are always being introduced. These constituents are environmentally harmful, which may lead to additional contamination during the separating process. Moreover, the heavy metal ions, which are water-soluble and highly toxic, are always contained in the oil-water mixtures created during industrial production. Therefore, material that is integrated by both capacities of oil-water separation and removal of heavy metal contamination would be of significance in both industrial applications and environmental sustainability. Herein, inspired by the composition and wettability of the shrimp shell, an eco-friendly chitosan-coated (CTS) cotton was developed. The treated cotton exhibits the superhydrophilic/underwater superoleophobic property and is capable of separating both immiscible oil-water mixtures and stabilized oil-in-water emulsions. More significantly, various harmful water-soluble heavy metal ions can also be effectively removed during the separation of emulsions. The developed CTS coated cotton demonstrates an attractive perspective toward oil-water separation and wastewater treatment in various applications.Keywords:superhydrophilic/underwater superoleophobic;oil-water separation;emulsions;chitosan;water purification
研究领域:
环境科学
·
材料科学
·
水处理
✓ 已验证
DOI
PubMed
高影响因子
Membranes
·
2022
·Vol. 12
·期 11
·1076
·
IF 4.562
Liang Wang,Jilei Wei,Chen Zhou,Shengyang Yang
One of the main trends in the development of solar interface evaporation technology is the simple, efficient, and environmentally friendly bio-based evaporation device. However, the development of bio-based evaporators with high water evaporation rates and good pollution removal capability is a significant challenge. Here, we present a carbonized cattail–agarose hydrogel (CCAH) membrane with numerous microchannels resembling bamboo knots, exceptional hydrophilicity, outstanding light absorption capability, and potent adsorption. Under one solar irradiation, its evaporation rate and efficiency reached 1.93 kg m−2h−1and 95.8%, respectively. More importantly, the CCAH membrane produces steam water that is almost totally free of salts (Na+, K+, Mg2+, and Ca2+), heavy metal ions (Pb2+, Cd2+, and Cr2+), and organic dyes (Rhodamine B, methylene blue, and methyl orange). The CCAH membrane is highly promising for the use of saltwater desalination and wastewater recovery to help people in impoverished areas with water scarcity problems.Keywords:solar water evaporation;seawater desalination;wastewater purification;carbonized cattail;hydrogel
研究领域:
环境科学
·
材料科学
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Yali Wang,Wenjin Xu,Qinshan Liu,Han Guo,Xiahui Gui,Yaowen Xing
Bubble detachment plays a crucial role in preventing excessive accumulation in gas–liquid reactors and improving the mass transfer efficiency. This study investigates the effect of surface hydrophobicity on bubble detachment induced by coalescence through high-speed dynamic experiments and numerical simulations. The results show that on surfaces with low hydrophobicity (contact angles of 15 and 25°), bubbles detach because the inner contact line contracts relatively slowly, allowing the outer contact line to coalescence quickly. In contrast, on highly hydrophobic surfaces (contact angles of 35 and 45°), the simultaneous contraction of both the inner and outer contact lines prevents bubble jumping. Numerical simulations indicate that low-hydrophobicity surfaces generate sufficient kinetic energy through the pressure gradient. As hydrophobicity increases, some of the energy is dissipated through liquid-film drainage, weakening internal convection and reducing the intensity of the upward flow, which ultimately prevents bubble detachment. Energy analysis further indicates that bubble coalescence shows a weak dependence on the Bo number, while the magnitude of the adhesion energy is the key factor determining bubble jumping. When the adhesion energy exceeds approximately 20% of the released surface energy, the coalesced bubble is unable to detach.
研究领域:
化学工程
·
流体力学
✓ 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）