JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2022
·Vol. 105
·期 2
·525-536
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IF 2.606
Xie Wenhao,Hua Weisan,Zhang Xuelai,Xu Huijin,Gao Liqiang,Zhang Liyu
The adsorption desalination and cooling system (ADCS), a promising technology for alleviating water scarcity, requires adsorbents with high performance, low cost, and low energy consumption. Enhancing the operating efficiency and minimizing the energy consumption of the system entails improving the adsorption performance and thermal conductivity of adsorbents. In this study, nanoparticles (NP) embedded silica gel (SG) composite adsorbents with CaCl 2 were synthesized for use in ADCS. The effects of nano-Fe, nano-Cu and carbon nanotubes (CNT) as SG thermal conductivity enhancers were thoroughly compared through microscopic properties, thermal properties and adsorption properties. The experimental results show that SG/CNT/CaCl 2 composite performs the largest specific surface area and pore volume of 180.72 m 2 g −1 and 0.13 cm 3 g −1 . Scanning electron microscopy (SEM), accelerated surface area and porosimetry (ASAP) and constant thermal analyzer (TCA) were used to characterize the various performance of the enhanced adsorbents comprehensively. SG/CNT/CaCl 2 sample exhibits high thermal conductivity and thermal diffusion coefficient, measuring as high as 0.664 W m −1 K −1 and 0.701 × 10 −6 m 2 s −1 , respectively. Based on dynamic water adsorption performance tests, the SG/CNT/CaCl 2 composite had an adsorption capacity of 0.665 g g −1 , five times higher than SG. The composite’s adsorption capacity and thermal conductivity did not decline significantly during cycling, indicating a high degree of sustainability. Therefore, these results imply that the nanoparticles-embedded SG/CaCl 2 adsorbent with excellent integrated properties has promising prospects in adsorption desalination systems. Graphical abstract
It was investigated how different embedded nanoparticles affected the thermal and adsorption performance of SG. The results showed that the composite SG/CNT/CaCl 2 exhibited the best performance, with the thermal conductivity and adsorption capacity being enhanced to 0.664 W m −1 K −1 and 0.665 g g −1 , respectively.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2019
·
IF 6.019
Ning Xie,Junyi Niu,Tong Wu,Xuenong Gao,Yutang Fang,Zhengguo Zhang
Phase change materials (PCMs) with excellent energy conservation performance have been extensively utilized in solar energy storage system . In this study, a novel kind of thermal storage composite material based on calcium chloride hexahydrate (CaCl 2 ·6H 2 O) salt hydrate as core PCM and cesium tungsten bronze (Cs x WO 3 ) nanoparticles as near-infrared (NIR) light absorbent additives is fabricated. The effect of Cs x WO 3 nanoparticles on crystalline morphology, thermal physical behaviors and light transmittance of CaCl 2 ·6H 2 O are investigated. Additionally, thermal cycle tests are conducted for stability examination. Furthermore, thermal regulating performance of double layer glass window filled with the PCM composite is tested in small chambers by being sunlight irradiated under a solar simulator . All results manifest that with the incorporation of Cs x WO 3 nanoparticles, the salt hydrate PCM composite exhibits large latent heat, low supercooling degree and high NIR light shielding ability as well as good thermal stability . When employed as the glazing window of a test room, the PCM panel has functions of reducing indoor temperature fluctuations and increasing thermal inertia. Hence, the salt hydrate/nano Cs x WO 3 PCM design in this work shows great potentials for the development of solar energy storage products in energy conservation fields.
研究领域:
材料科学
·
能量存储
·
太阳能
·
热工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Wenwu Peng,Xinrong Pan,Xinjuan Liu,Yang Gao,Ting Lu,Jiabao Li,Min Xu,Likun Pan
Ignited by the concept of bionics , hydrogel-based bionic skin sensors have received more and more attention and been widely used in health monitoring, robots, implantable prostheses and human-machine interfaces. However, there still remain some challenges to be urgently solved for hydrogel-based bionic skin sensors, such as the water evaporation and the defects of single conductive mechanism of electronic skin or ionic skin. Herein, we prepared a polyvinyl alcohol/polyacrylamide/CaCl 2 /MXene (PPCM) ionotronics hydrogel with moisture self-regenerative, highly sensitive, ultra-low temperature anti-freezing (−50 °C) and self-adhesive features and applied it as bionic skin strain sensor. The introduction of MXene and CaCl 2 endows the PPCM hydrogel with both electron and ion conductive channels, which effectively compensates for the defects of single electronic skin or ionic skin. Importantly, the addition of CaCl 2 into the PPCM hydrogel offers it the moisture self-regenerative ability, holding the long-term water retention. The water in the PPCM hydrogel can still be kept in a stable state after continuous use for 70 days at room temperature , thus ensuring the long-term stability of the hydrogel-based sensor. Such a moisture self-regenerative ability should be an important feature for intelligentizing the hydrogel-based bionic skin for practical applications.
研究领域:
材料科学
·
生物医学工程
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Muyang Gu,Yaoqi Huang,Kaidi Bao,Liuyi Wang,Ting Huang,Yuanyuan Li,Xiaomin Cheng
Hydrated salt phase change materials have great application value in passive thermoregulation fields due to their low phase change temperature . However, their practical applications are limited by problems such as leakage and phase separation, which require urgent attention. To solve these problems, in this study, a W/O emulsion system was constructed by sol-gel method, and microencapsulated composites with graphene oxide (GO) as the thermally conductive reinforcing phase, silica as the shell material, and calcium chloride hexahydrate (CaCl 2 ·6H 2 O, CCH) as the core material was prepared. The regular spherical SiO 2 shell layer effectively reduces the possibility of leakage of the core material. The excellent thermal conductivity of GO increases the thermal conductivity of the composites by about 41.14 % compared with that of pure CCH and maintains a latent heat of >114.1 J/g. The encapsulation of SiO 2 and the introduction of GO improve the thermal cycling stability of the composites. After 150 thermal cycles, the composites still had 96.5 % (110.1 J/g) latent heat and 99.6 % (0.708 W·m −1 ·K −1 ) thermal conductivity. The GO/SiO 2 @CCH microencapsulated composites had good temperature regulation. This study provides a promising solution for preparing hydrated salt-based shape-stabilized composites and expands their applications in construction and other fields.
研究领域:
材料科学
·
热能工程
·
能源存储
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Xinsheng Qin,Qingli Bo,Panzhu Qin,Sufang Wang,Kaiyong Liu
In this study, we demonstrated the role of whey protein isolate (WPI)/(−)-epigallocatechin-3-gallate (EGCG) covalent conjugates/gellan gum double network emulsion gels by duo-induction of glucono-δ-lactone (GDL) and CaCl 2 on the digestion viability of Lactobacillus Plantarum powders. We employed a novel one-step continuous cold gelation strategy to product double network emulsion gels. The gellan gum in continuous phase was first induced by CaCl 2 to form a gel in a short time. Besides, the GDL was improved covalent cross-linking between WPI-EGCG covalent conjugate Pickering particles or particle-coated oil droplets because of the slowly pH reduction. The first cross-linked gellan gum gels could be more closely integrated into the GDL-induced second gel networks with synergistic role, which promoted the formation of compact and homogeneous networks through hydrophobic interactions and disulfide bonds. Thus, the results provide a promising strategy for probiotic powders encapsulation of double network emulsion gels in oral applications of gel type foods.
研究领域:
食品科学
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生物技术
·
药学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Yaqi Ding,Neng Gao,Yongping Wu,Yongmei Xuan,Guangming Chen
Calcium chloride (CaCl2) aqueous solution as a liquid desiccant has the disadvantage of low vapor pressure and easy crystallization. Ionic liquids (ILs) such as [Emim]Cl, [Emim]Ac, and [Emim]Br have been verified to have a good ability to reduce the vapor pressure. In this paper, the vapor pressures of four kinds of CaCl2 + ILs + H2O were measured, which were CaCl2 + [Emim]Br + H2O (mass ratio CaCl2/[Emim]Br = 2:1) at temperatures of between 311.10 and 394.45 K, CaCl2 + [Emim]Cl + H2O (mass ratio CaCl2/[Emim]Cl = 2:1) at temperatures of between 306.58 and 393.89 K, CaCl2 + [Emim]Ac + H2O (mass ratio CaCl2/[Emim]Ac = 2:1) at temperatures of between 304.93 and 382.71 K, and CaCl2 + [Emim]NO3 + H2O (mass ratio CaCl2/[Emim]NO3 = 2:1) at temperatures of between 312.46 and 391.80 K, with the mass fraction of solute ranging from 0.2 to 0.5. The Antonie-type equation was used to fit the measured results. The average absolute relative deviation (AARD %) values of the measured vapor pressures and calculated vapor pressures were 0.52, 0.40, 0.33, and 0.27%, which showed good consistency and accuracy. Comparing the vapor pressures of the different solutions at the same concentration, the following order of the four anions with the ability to reduce the vapor pressure of CaCl2 + H2O can be drawn at a mass fraction of 0.4: Br– > Cl– > NO3– > Ac–.
研究领域:
化学工程
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2024
·
IF 2
Jie Li,Huan Zhou,Jie Yang,Cunbing Xu,Sifan Wang,Yifan Li,Jiangbo Chen
The solid–liquid phase equilibria of the Li+, Na+, Ca2+//Cl––H2O quaternary system at 298.15 and 323.15 K are studied via the isothermal solubility phase equilibrium method. The solubility data and liquid properties of density and pH are obtained. The phase diagrams of the quaternary systems, including the water free diagram, the water diagram, and the dry salt diagram, are plotted to show the phase regions, water content, and salting-in effect. NaCl occupies the largest phase region at both 298.15 and 323.15 K. One double salt LiCl·CaCl2·5H2O occurs at 298.15 K and builds up two invariant points; one incommensurate invariant point saturated by (NaCl, LiCl·H2O, LiCl·CaCl2·5H2O) and one commensurate invariant point saturated by (NaCl, CaCl2·4H2O, LiCl·CaCl2·5H2O), but at 323.15 K, no double salt forms. The salting-in effect that happened in ternary systems still occurs in the quaternary Li+, Na+, Ca2+// Cl––H2O system at both temperatures. NaCl saturated concentration increases with LiCl and CaCl2 contents and results in a very high total salt content at commensurate invariant points, e.g., they are 56.92 and 60.62% at 298.15 and 323.15 K, respectively.
研究领域:
化学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Bo Yin,Yanyan Gao,Tao Li,Hongxiang Kang,Leipeng Li,Yanmin Yang
Mechanoluminescent materials have recently attracted considerable attention as they can convert stimulation of mechanical force into photons that can be used in many areas, ranging from basic energy-saving lighting and display to advanced ultrasound-induced biomedical imaging. However, functional and optical materials that feature emission of mechanoluminescence (ML) have only a limited diversity. Here Eu 2+ -doped CaCl 2 was introduced to expand the family of mechanoluminescent materials. It was demonstrated that CaCl 2 :Eu 2+ could emit photoluminescence , radioluminescence , ML, and persistent luminescence (PersL). Eu 2+ ions always acted as luminescent centers (5d→4f transition) during these four emission modes. Moreover, the property of traps of CaCl 2 :Eu 2+ was investigated in detail. Experimental results indicated that there was a competitive relation between ML and PersL, and ML belonged to trap-controlled ML.
研究领域:
材料科学
·
发光材料
·
光学物理
·
力响应材料
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Hui Dang,Benfeng Wang,Zhidong Chang,Xue Wu,Jingge Feng,Hualei Zhou,Wenjun Li,Changyan Sun
When the spent lithium ion battery is processed pyrometallurgically, lithium is generally fixed as slag with a high melting/boiling point which is difficult to be treated further. In this research, an innovative method to recycle lithium from pyro-slag by evaporation during chlorination roasting was proposed. Different chlorine donors, namely NaCl, AlCl3, and CaCl2 were evaluated by HSC software and experiments, among which CaCl2 possessed a stronger ability of chlorine donation in the chlorination roasting process. Experiments proved that 97.45% lithium was evaporated with the Cl/Li molar ratio of 1.8:1 when the mixture of a simulated slag and CaCl2 was roasted at 1000 °C for 90 min. XRD results demonstrated that the majority of LiAl(SiO3)2 in the slag was transformed into LiCl. All results implied that chlorination roasting should be a promising strategy for lithium recovery from the pyrometallurgical slag after pyro-treatment of the spent lithium ion battery.
研究领域:
冶金学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INORGANICA CHIMICA ACTA
·
2019
·
IF 2.433
Zhongbao Liu,Wenqi Gao,Xin Qi,Fengfei Lou,Huiwei Lang
In this article, MIL-101(Cr) powder material was successfully prepared by hydrothermal synthesis and combined with different mass fractions of CaCl 2 by immersion method to obtain MIL-101(Cr)/CaCl 2 composite materials. The physical properties of the adsorbent were determined by X-ray powder diffraction, N 2 adsorption/desorption isotherm, TGA and FTIR. The water vapor adsorption performance of MOFs was tested by a gravimetric instrument to analyze the underlying mechanism. Results indicated that the specific surface area, total pore volume, and pore size distribution of micropores and mesopores of MIL-101(Cr)/CaCl 2 composites decreased with increasing CaCl 2 content. When P/P 0 = 0.9, the water vapor equilibrium adsorption capacities of MIL-101(Cr), MIL-101(Cr)/CaCl 2 -10%, MIL-101(Cr)/CaCl 2 -20%, and MIL-101(Cr)/CaCl 2 -30% were 1.05, 0.88, 1.13, and 1.35 g/g, respectively. MIL-101(Cr)/CaCl 2 -30% agglomerated after water absorption, so MIL-101(Cr)/CaCl 2 -20% was selected as the final experimental material. The water vapor adsorption heat of MIL-101(Cr)/CaCl 2 -20% was 42–58 kJ/mol, which is close to the evaporation enthalpy of water (44 kJ/mol at 25 °C). The analysis of the adsorption kinetics showed the relatively uniform adsorption rate of MIL-101(Cr)/CaCl 2 -20%. Overall, MIL-101(Cr)/CaCl 2 -20% exhibited superior water vapor adsorption performance and have great potential for application to adsorption heat pumps.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Guiyuan Cui,Huilin Yin,Wenting Zhou,Chuncheng Yang,Zhengzheng Xu,Guoyong Wang
Vapor spontaneously diffuses from areas of high concentration to areas of low concentration as a consequence of the Second Law of Thermodynamics and the hunt for maximum entropy. The distribution of substances with lower saturated vapor pressures on a surface can create this concentration slope in the space. However, most substances, except ice, cannot maintain this slope because humidity sinking causes their saturated vapor pressure to drop. Moreover, the location of ice growth is difficult to control. In this paper, a pattern of CaCl2 was made on the micronano hierarchically aluminum substrate. When the temperature drops below zero, the vapor pressure at the position where CaCl2 is located is low relative to that of water as a way to achieve a continuous phase transition from solid CaCl2 to brine to ice. Thus, vapor nearby continuously diffuses to and deposits at the site, resulting in a lasting dry region around without water condensation. The frost growing on the pattern is also fluffy and can be easily removed by gravity and/or wind. This work has promising applications in areas where it is extremely difficult to use active deicing methods.
研究领域:
材料科学
·
热力学
·
表面工程
✓ 已验证
DOI
高影响因子
ISIJ INTERNATIONAL
·
2025
·
IF 1.8
Shiwei Lin,Xiao Yang
Steelmaking slag contains valuable components. Its high phosphorus content hinders its reutilization in the steelmaking process. This study proposes an efficient phosphate removal process using molten CaCl2 as the reaction medium, aiming to enable slag recycling and P recovery. Experimental results show that nearly all P-bearing phases in steelmaking slag are leached into molten CaCl2 under the tested conditions (850 to 1000 °C, slag/CaCl2 mass ratios 1:10 to 1:2.5). The leaching mechanism involves the reaction of slag's P-bearing phases with CaCl2 to form intermediates (Ca2PO4Cl and Ca3SiO4Cl2), which dissociate into PO43– and other ions in the melt. For other elements: Si(IV) leaches continuously but incompletely; Fe(II) and Mn(II) concentrations in the melt first increase then decrease, attributed to the evaporation of volatile FeCl2 and MnCl2; Mg and Al remain nearly unleachable. After leaching, adding carbon to the P-enriched melt achieves complete P(V) removal via carbothermal reduction. This molten CaCl2-based approach provides a sustainable alternative to conventional technologies, offering valuable insights for the comprehensive utilization of P-bearing solid wastes.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）