JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
·
IF 4.233
Yuechen Zhai,Ding Zhou,Pengtao Jing,Di Li,Haibo Zeng,Songnan Qu
Luminescent carbon nanodots (CDots) have attracted much attention, but their luminescence is usually quenched in solid state. Efficient green or yellow emissive CDot-based phosphors are scarce. In this work, green emissive CDot@NaCl composite phosphors were fabricated through a convenient, low cost and eco-friendly way by embedding green emissive CDots (g-CDot) in NaCl crystals. With the protection of NaCl host, the g-CDot@NaCl composite phosphors exhibit good photostability, significant resistance to organic solvents , and improved photoluminescence quantum yields up to 25%. White light-emitting diodes with tunable color temperatures (3944–5478 K) and CIE coordinates have been realized based on the g-CDot@NaCl composite phosphors.
研究领域:
材料科学
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纳米技术
·
光电子学
·
光子学
✓ 已验证
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Yuliang Chen,Wenmin Wang,Ying Liang,Chen Chen,Rui Meng,Libo Ba,Yuliang Wu,Yijiang Liu,Weiwei Huang,Fei Yang,Jun Cheng,Xuesong Yi
Nanofiltration technology has garnered significant attention due to its potential to address global water scarcity. However, the low rejection rates of monovalent salts, such as NaCl, have limited the broader application of nanofiltration membranes. In this study, polyvinylidene fluoride (PVDF) powder was chemically modified by a saturated sodium hydroxide solution to the formation of a phase transition from the non-polar α-phase to the polar β-phase. The NaOH treatment promoted this phase transition by disrupting the crystal structure and enhancing molecular polarity, thereby inducing piezoelectric properties in the membrane. The modified PVDF was then formed as ultrafiltration substrate to fabricate a nanofiltration membrane with a dual-layer charge structure through surface charge-regulated interfacial polymerization. The NaOH-induced chemical modifications significantly improved both piezoelectric effect and ion rejection performance. The Piezo-PVDF nanofiltration membrane exhibited a 60 % rejection rate for 1 g/L NaCl, with an optimal water flux of 13.5 L m 2 h −1 bar −1 . This study demonstrates how NaOH-induced phase transition and piezoelectric activation optimize charge distribution across the membrane, leading to enhanced desalination performance. These findings provide new insights into the chemical mechanisms driving PVDF membrane modification and offer a strong theoretical and experimental foundation for the development of efficient and cost-effective desalination technologies.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Xuejiao Li,Na Li,Weihua Liu,Zhongfeng Tang,Jianqiang Wang
The first principle molecular dynamics (FPMD) simulations in combination with experimental measurements are applied to investigate the thermophysical properties and structural evolution of MgCl 2 –NaCl–KCl (MNK) eutectic . The densities, melting point, and enthalpy of fusion simulated by FPMD within NPT ensemble are consistent with experimental results. Besides, the thermal conductivity of molten MNK eutectic evaluated from FPMD simulations with NVT ensemble gives satisfactory result. Furthermore, the shear viscosities of MNK eutectic are deduced based on ion self-diffusion coefficients and solvodynamic radius, similar to the data estimated by additive contribution method. Eventually, the change rules of radial and angular distribution functions and structural factor of MNK eutectic during melting are revealed, and the melting mechanism is proposed from the evolution of polyhedral coordination structures. These results are heuristic in structure-activity relationship of MNK eutectic, which sheds insight for further development of efficient heat transfer and storage media through microstructure engineering.
研究领域:
材料科学
·
热物理
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Lei Bian,Jie Ma,Jiebing Ai,Yan Wang,Naiyu Wang,Xiayan Wang,Guangsheng Guo,Qiaosheng Pu
NaCl has been successfully used as a template for the synthesis of 2D nanomaterials, but it is seldom used for the construction of flat small organic molecules. Herein, a simple, low-cost, and highly efficient synthesis of phenazines with planar main frames, such as 5-phenyl-5,14-dihydro-5,7,12,14-tetraazapentacene, in the presence of NaCl micro-crystal as a kind of molecular mold is described. The reactants were mixed with NaCl powder and heated to 320 °C for 5 min. Yields >90% were readily achieved after a simple precipitation in water. The effectiveness of NaCl crystal as a mold with HCl was confirmed by comparison with common inorganic salts, SiO2, and γ-Al2O3 with HCl together with combinations including NaNO3 + HNO3, Na2SO4 + H2SO4, NaH2PO4 + H3PO4, and NaH2PO4 + polyphosphoric acid. The mechanism was deduced with the aid of computer simulation, which confirms the stabilization of 5,14-dihydro-5,7,12,14-tetraazapentacene by the NaCl surface. DMSO solution of a product, 1,3-dihydro-imidazo[4,5-b]phenazin-2-one, showed enhanced fluorescence in H2O, and it was used as a fluorescent probe for pH and Hg2+. A full-color material was prepared by mixing precursors of epoxy resin and phenazines, and its fluorescent color could be adjusted by the ratio of phenazines.
研究领域:
有机化学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD MICROBIOLOGY
·
2020
·
IF 4.155
Xiao Gan,Ling Zhao,Jungang Li,Juncai Tu,Zhaoming Wang
This work aimed to determine the effects of partial substitution of NaCl with 0% (control), 30%, 50%, and 70% of KCl on the bacterial communities, proteolysis and lipid oxidation of Chinese bacon during processing. The proportion of genus Lactobacillus increased from 22.45% (fresh meat) to 72.78%, 81.64%, 76.53% and 85.63% at the end of processing for 0%, 30%, 50% and 70% KCl replacement samples, respectively. During the processing, Lactobacillus gradually became the dominant one, and higher the KCl ratio, more rapid was the process. After salting, the TBARS of control was markedly higher (P < 0.05) than that of the others, while a similar lipid oxidation level (P > 0.05) was observed at the end of processing for different groups. After salting, there was no difference in total free amino acids (TFAA) content among four treatments (P > 0.05), whereas KCl replacement samples shared significantly higher (P < 0.05) values than control at the end of processing. Redundancy analysis and Pearson correlation showed positive correlation between Lactobacillus versus TBARS and TFAA. Partial replacement of NaCl with KCl could, directly or subsequently by promoting the growth of Lactobacillus, influence proteolysis and lipid oxidation over the manufacturing process.
研究领域:
食品科学
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微生物学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
IONICS
·
2022
·Vol. 29
·期 1
·183-191
·
IF 2.961
Wang Yang,Liang Xin,Wu Xiaolong,Wang Lulu,Xu Kun,Sun Yi,Wang Jiazhao,Xiang Hongfa
Li–S batteries have been
considered as the most desirable candidate for next-generation batteries because of their high energy density and low cost, although the problems of the insulating nature of S and Li 2 S and the “shuttle effect” of polysulfides in Li–S batteries have to be addressed. In this work, we propose NaCl templates and a solid–liquid coexistence strategy to synthesize an N-doped carbon matrix with interconnected micro-mesoporous structure. Benefiting from the critical state of solid–liquid coexistence at the melting point of NaCl and a pretreatment by pressure, a unique porous structure with an interconnected network of micropores and mesopores is obtained. The micropores can prevent the dissolution of polysulfides, the mesopores can increase the S loading, and the interconnected pore network can significantly improve the usage of active materials. As a result, the cathode with the N-doped carbon matrix shows improved electrochemical performances.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
IONICS
·
2020
·Vol. 27
·期 1
·289-303
·
IF 2.394
Suo Yange,Zhang Zihan,Zhang Zhiguo,Hu Guilin
In this work, a facile method is reported for the synthesis of ZIF-67-derived cobalt and nitrogen-doped carbon (Co-N-C) materials with enlarged average pore sizes as electrocatalysts towards oxygen reduction reaction (ORR). The pore diameters of the Co-N-C can be greatly enlarged using NaCl as an additive during the pyrolyzing process. Thermo-gravimetry (TG) results suggest that NaCl could facilitate the structural decomposition of ZIF-67, resulting in the adjusted physiochemical properties of the obtained Co-N-C materials. The CoNC-1NaCl-700 and CoNC-1NaCl-800 materials derived from ZIF-67 in the presence of NaCl at relatively high pyrolyzing temperatures (i.e., 700 °C, 800 °C) exhibit superior catalytic activity compared with the CoNC materials derived from pure ZIF-67, which could be due to their unique structures of larger average pore sizes, higher surface areas, higher contents of pyridinic-N and graphitic-N. The onset potential of the CoNC-1NaCl-800 towards ORR is 0.94 V (vs. RHE) and the half-wave potential is 0.84 V (vs. RHE), which are comparable with that of commercial Pt/C.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2019
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IF 5.399
Ge Ge,Yurui Han,Jiabao Zheng,Mouming Zhao,Weizheng Sun
Effects of partial substitution of NaCl with KCl, MgCl 2 or CaCl 2 on oxidative characteristics of myofibrillar protein (MP) in a hydroxyl radical generating system and their heat-induced gel properties were investigated. Results indicated that MP oxidation is dependent upon the different chloride salt types and substitution degree. MP at 0.60 M NaCl was beneficial to protein unfolding and gel quality in the oxidative system. Increased formation of disulfide bonds affected the MP conformation and resulted in a large particle size and an aggregated network of gel at the 50% substitution degree of KCl. The presence of CaCl 2 or MgCl 2 substitutes contributed to protein polymerization and insolubility. MP aggregation restrained the formation of dense and continuous gel networks during heating, and thus resulted in a low-grade gel. Ca 2+ had more serious impact on gel properties than Mg 2+ , dependent on different cation effects. Substitution of 25% NaCl by KCl gave acceptable gel quality in MP.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2020
·
IF 7.098
Zhan Yi,Feifei Shao,Liyan Yu,Na Song,Hongzhou Dong,Beili Pang,Jianhua Yu,Jianguang Feng,Lifeng Dong
Poor chlorine resistance shortens service life of polyamide (PA) reverse osmosis membrane . Here, nitrogen-doped graphene oxide quantum dots (N-GOQDs) were firstly applied to graft on PA membrane surface . Most grafting experiments are often accompanied by a decrease in water flux . In this study, the flux of the grafted membrane can be increased compared with commercial pristine membranes . Also, all modified membranes show better chlorine resistance than pristine ones. Specifically, N-GOQDs are integrated onto polyamide membranes through grafting method. Comprehensive regulation of chlorine resistance and desalination performance can be achieved by changing grafting conditions. For example, under the conditions of 12 h grafting time and 0.002 mg/mL of N-GOQD solution, water flux, NaCl rejection, and chlorine resistance of the modified membrane are improved by 11.1%, 2.3% and 32.8% after 280 h chlorine soaking respectively. FTIR analyses show that hydrogen bonded C O groups can be observed in the N-GOQD grafted membrane after chlorine tests, but they are destroyed and weakened in pristine membranes, which indicates that the modified membrane has better resistance to reactive chlorine.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
Geoenergy Science and Engineering
·
2024
·
IF 0
Ou Jiang,Xiuhua Zheng,Qingjie Gong,Haidong Wu,Baozhen Chu
Water-rock interactions induced by working fluids in hot dry rock (HDR) reservoirs lead to reservoir damages through mass transfer. Therefore, investigating the mass transfer mechanisms due to the interactions between working fluids and reservoir rocks contributes to minimizing HDR reservoir damages. Drilling fluid is an important working fluid, yet the interactions between drilling fluids and HDR reservoir rocks lack understandings. Here, interaction experiments were conducted using a high-temperature and high-pressure flow reactor under temperatures of 180 °C and 240 °C, a pressure of 24 MPa, and a flow rate of 0.05 mL/min for 7 days. Pure water and an alkaline NaCl solution, which is referred to a HDR reservoir drilling fluid, were prepared to interact with granite cuttings from the HDR reservoir at Qiabuqia site in Gonghe Basin, Qinghai Province, China. Mineral characteristics, mass and chemical changes in the cuttings, solution element content concentrations, micro-morphology and element contents on the cuttings surface, as well as the size of suspending fines in the solutions were determined to reveal the mass transfer mechanisms. The results indicate that the mass transfer mechanisms include mineral reactions and fines migration, and fines migration is the dominating mechanism. The mineral reactions, including feldspar dissolution, quartz dissolution and feldspar alteration, are strong at the front section, while are weak at the end section. At the middle section, the released element contents by mineral reactions form various precipitates, mainly including aluminosilicate, silicate and silica. Strong mineral reactions at the front section lead to fines migration, while the precipitation of Na-bearing minerals at the middle section inhibits fines migration through a coating effect. Suspending fines are identified in the solutions, with a diameter of 100–300 nm, and settled fines are observed at the end section, with a diameter of hundreds of nanometers to a few microns. Simulations of reaction equilibrium show that the precipitation of quartz and biotite increases with a higher NaCl concentration and a lower temperature, while albite changes from dissolution to precipitation as NaCl concentration rises from 6 wt% to 12 wt%. The formation of halite by simulations supports the coating effect. This study provides theoretical basis to minimize HDR reservoir damage induced by working fluids.
研究领域:
地质学
·
地球化学
✓ 已验证
DOI
ACS Sustainable Chemistry & Engineering
·
2016
·
IF 5.267
Xing-kang Li,Zhen Fang,Jia Luo,Tong-chao Su
In order to develop a process for the simultaneous production of furfural and easily hydrolyzable cellulose, the degradation of sugar cane bagasse in a single aqueous system and in a 2-methyltetrahydrofuran (MTHF)/aqueous AlCl3 biphasic system was studied. In single aqueous system, the influence of acid species (FeCl3, HCl, and AlCl3) on furfural production and cellulose degradation was investigated at 150 °C. FeCl3 and HCl promoted furfural production from hemicellulose but with severe cellulose degradation. AlCl3 decreased cellulose degradation with considerable furfural yield and high glucan content in solid residues. The role of NaCl in furfural production and cellulose decomposition was also investigated in the single aqueous system using different acids as catalysts. Addition of NaCl significantly promoted furfural yield but also accelerated cellulose decomposition when FeCl3 or HCl was used as catalyst. In the AlCl3-catalyzed system, NaCl had less influence on residue yield and its composition, although NaCl also promoted furfural production. The influence of MTHF on furfural yield, residue composition, and enzymatic hydrolysis of residue was also studied. Under the best conditions (0.45 g of bagasse, 9 mL of MTHF, 9 mL of water, 0.1 M AlCl3, 150 °C, 45 min, and 10 wt % NaCl), 58.6% furfural was obtained while more than 90% of cellulose remained in the residue. The organic phase was separated from the aqueous phase directly by decantation. After reuse of organic phase for 3 cycles, 11.5 g/L furfural was obtained. The catalyst-containing aqueous phase could be reused directly after decantation of the organic phase without loss of activity. The obtained residue was easy to hydrolyze and produced 89.3% glucose yield after 96-h enzymatic hydrolysis at low cellulase loading (30 FPU of cellulase/g glucan).
研究领域:
生物化学工程
·
可再生资源利用
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Hongju Qiu,Yanqiong Zhang,Weiwei Huang,Jinhui Peng,Jin Chen,Lei Gao,Mamdouh Omran,Nan Li,Guo Chen
Tetragonal zirconia nanopowders (3Y-TZP NPs) stabilized by 3 mol % Y2O3 were synthesized by a novel sol–gel–flux method. The effects of calcination temperature, Y2O3 content, and molten salt system (NaCl + KCl binary system and NaCl unary system) on the phase composition and morphology of nanopowders (NPs) were investigated. Meanwhile, the sintering properties of the prepared 3Y-TZP NPs were studied. The 3Y-TZP NPs and sintered ceramics were characterized by thermogravimetry-differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET) analysis, and X-ray fluorescence (XRF) spectroscopy. The results show that the optimum calcination temperature for obtaining dispersed ZrO2 NPs is reduced from 800 to 660 °C when the NaCl unary system is substituted by the NaCl + KCl binary system. 3Y-TZP NPs with a single tetragonal phase are obtained in the NaCl + KCl binary system when Y2O3 content in the raw material is 5 mol %. The average particle size of the obtained ZrO2 NPs is reduced from 47.25 nm in the unary system to 26.18 nm in the binary system because of the lower calcining temperature. Furthermore, the 3Y-TZP NPs obtained in the binary system have narrower particle size distribution and better sintering performance than ZrO2 NPs obtained in the unary system. After sintering for 4 h at 1200 °C, the former generated 3Y-TZP ceramics with higher density and finer grain size. This work produced narrow-distributed well-dispersed 3Y-TZP NPs with quasi-spherical morphology, which are good candidates for the applications, including oxygen sensors and thermal barrier coatings.
研究领域:
材料科学
·
纳米技术
✓ 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）