COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Jiaojiao Cao,Yubo Lian,Huatao Weng,Zhenyu Chen
The effect of an external DC electric field on the inhibition behavior of Zn-MOFs in 0.5 mol/L NaCl solution for copper was investigated via electrochemical measurements and various characterization techniques. Results indicated that the corrosion inhibition efficiency of the Zn-MOFs decreased under strong electric field intensities, which went from 94.2% to 61.7%. The corrosion inhibition efficiency of the materials decreased with increasing electric field duration when maintained at a certain electric field intensity. When the electric field duration time was 6 h, 12 h, 18 h and 24 h, the corresponding efficiency was 90.4%, 86.8%, 78.2% and 61.7% respectively. The effect of an electric field on the corrosion inhibition performance of the Zn-MOFs could essentially be attributed to changes in the structure of the material framework.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2015
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IF 2.037
Rongrong Li,Jian Wan,Yingjie Zhang,Danxia Liang,Bin Zhang,Chenghong Li
The equilibrium solubility of sodium 1-naphthalenesulfonate in binary NaCl + water, Na2SO4 + water, and C2H5OH + water solvent mixtures was measured by a steady-state method at elevated temperatures from (278.15 to 323.15) K. The results of these data were correlated by a modified Apelblat equation. The dissolution enthalpy (ΔHd) and entropy (ΔSd) of sodium 1-naphthalenesulfonate in solutions of different mole fraction were obtained.
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Sustainable Chemistry and Pharmacy
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2025
·
IF 5.8
Yang Liu,Shuo Zhang,Tingwei Zhang,Yongcan Jin,Huining Xiao,Chaofeng Zhang
5-Hydroxymethylfurfural (HMF) is a versatile biomass-derived platform compound, but its production from glucose and cellulose remains challenging. In this study, several nano-metal oxides (Al 2 O 3 , TiO 2 , ZrO 2 , and SnO 2 ) with distinct Lewis acidities were combined with a trace amount of HCl to catalyze the conversion of glucose to HMF in a methyl isobutyl ketone (MIBK)/H 2 O–NaCl biphasic system. Without HCl, fructose was formed and accumulated in the aqueous phase due to insufficient Brønsted acidity, limiting further dehydration to HMF. The addition of HCl effectively overcame this bottleneck, with Al 2 O 3 and HCl showing the best synergy. Under optimized conditions, a HMF yield of 69.1 % was achieved at 180 °C, and Al 2 O 3 exhibited excellent recyclability. This work demonstrates a promising approach for combining homogeneous and heterogeneous catalysis for efficient conversion of renewable carbohydrates into platform chemicals.
研究领域:
催化化学
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生物质转化
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绿色化学
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化学工程
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有机合成
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Shuai Ran,Ji Qi,Xufeng Dong,Hao Huang,Min Qi,Wenjing Dong,Penghui Zhao,Zenghui Zhao,Jingyuan Yang
Controllable preparation of cross-linked mesoporous carbon materials on a large scale remains challenging. In the present work, a simple NaCl-assisted pyrolysis strategy is proposed here to efficiently convert closed pores into open pores in the pyrolysis products of 2-methylimidazole zinc salt nanoparticles/polyacrylonitrile (ZIF-8/PAN) electrospun fibers to prepare 1D cross-linked mesoporous N-rich carbon-based oxygen reduction reaction (ORR) electrocatalyst. The total specific surface area of micropores and mesopores was significantly increased from 162 m 2 /g to 1069 m 2 /g (mesopores: 704 m 2 /g). The ORR catalytic activity of open pore was superior to that of closed pore with more positive onset potential (0.96 vs . 0.85 V) and half-wave potential (0.79 vs . 0.72 V), larger limiting current density (5.23 vs . 3.62 mA cm −2 ) and electron transfer number (3.89 vs . 3.15). Such enhanced performance was attributed to the transformation from closed to open pores which greatly improved the mass transfer performance and the number of active sites.
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FOOD HYDROCOLLOIDS
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2023
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IF 10.7
Hui Xue,Tianfeng Han,Guowen Zhang,Xiaobo Hu,Ruiling Li,Huilan Liu,Rui Li,Yonggang Tu,Yan Zhao
Salted preserved eggs are made using poultry eggs under the combined action of NaOH, NaCl, and heat. To elucidate the main basis and mechanism of the formation of salted preserved egg white, the effects of NaOH (0.5–2.5%), NaCl (0–1.2%), and heat (72–100 °C) on the properties of ovalbumin (the most abundant protein in poultry egg whites) gel were studied. With increasing NaOH addition, the pH and the absolute value of zeta potential (TAV-ZP) increased, the opacity and Hunter whiteness decreased, and the relaxation time (T 2 ) initially decreased and then increased. With increasing NaCl addition and heating temperature, the pH and TAV-ZP decreased, the opacity and Hunter whiteness increased, and T 2 decreased first and then increased. In addition, the hardness and cohesiveness of the ovalbumin gel were greatly modified by NaOH, NaCl, and heat. NaOH contributed to the formation of the gel network structure. In addition, the surface hydrophobicity (H 0 ) analysis result indicated that the tertiary structure of the ovalbumin had changed during the formation of the ovalbumin gel. The correlation analysis results showed that electrostatic repulsion played a vital role in the formation of the transparent ovalbumin gel, and the transparent ovalbumin gel possessed the following characteristics: low aggregation degree, high cross-linking degree, high immobilized water content, gel network structure, and the fully unfolded structure of ovalbumin molecules. In general, the ovalbumin formed a unique gel under the combined action of NaOH, NaCl, and heat. This study could provide theoretical guidance for the processing and control of salted preserved eggs and a reference for highly transparent egg white gel products.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Y. Lei,Z.N. Jiang,X.Q. Zeng,Y.Y. Li,X. Wang,H.F. Liu,G.A. Zhang
In this work, dodecyltrimethoxysilane (DTMS)-modified zeolitic imidazolate frameworks nanoparticles (ZIF-67@DTMS NPs) were prepared and added into epoxy (EP) matrix to fabricate composite coating . The anti-corrosion performance and adhesive force of ZIF-67@DTMS/EP coating were measured with electrochemical impedance spectroscopy and pull-off tests. The results show that compared to pure EP coating, the impedance modulus of ZIF-67@DTMS/EP composite coating is significantly enhanced. The prepared ZIF-67@DTMS NPs as nanofillers can significantly improve the corrosion resistance and the adhesion of EP coating. In addition, the diffusion coefficient of aggressive species in the coatings were determined by molecular dynamics simulations , and the influence mechanism of ZIF-67@DTMS NPs on the anti-corrosion performance of epoxy coating was explored. The ZIF-67@DTMS NPs could combine with EP tightly through forming hydrogen bond . Meanwhile, these NPs could fill in the holes in the EP coating and then block the transmission channel of aggressive species, which enhances the barrier of coatings to the access of aggressive species, then improves the anticorrosion performance of coatings.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
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IF 3.573
Lei Liu,Shaoyi Qu,Zhaoxian Yang,Yingbo Chen
Salt accumulation often occurs in conventional processes for textile wastewater treatment, which affects the dye removal efficiency and water recovery rate. Nanofiltration is a feasible way to fractionate dye/NaCl mixtures. In this study, to enhance the dye/salt separation efficacy, two-dimensional (2D) WS2 nanosheets were incorporated and coordinately bonded to polyelectrolytes for fabricating layer-by-layer hybrid nanofiltration membranes. The incorporation of WS2 enhanced the hydrophilicity and surface negativity of the membrane. Further, the stacking of WS2 nanosheets and their frictionless surface promoted water transportation in polyelectrolyte multilayers. WS2-incorporated membrane (2 wt %) exhibited the highest pure water flux and achieved separation factors of 7238 and 9036 during filtration of Conge red/NaCl and reactive black 5/NaCl binary solutions, respectively. Moreover, the instability of the multilayered polyelectrolyte membrane in high ionic strength solutions was overcome by the incorporation of WS2, and the WS2-incorporated membrane showed better antifouling performance toward model organic foulants.
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IONICS
·
2020
·Vol. 27
·期 1
·289-303
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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.
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JOURNAL OF MEMBRANE SCIENCE
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2018
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IF 6.578
Junbin Liao,Jiajie Zhu,Shanshan Yang,Nengxiu Pan,Xinyan Yu,Chao Wang,Jun Li,Jiangnan Shen
Developing highly ion conductive and desirable electrodialysis (ED) performance anion exchange membranes (AEMs) is of great significance. In this work, we report a strategy for fabricating novel AEMs based on a series of fluoro-methyl poly(arylene ether ketone)s having long-side-chain imidazolium groups for ED. Having hydrophilic conductive flexible side-chain imidazolium groups and rigid hydrophobic backbone within AEM matrix, the optimized AEM (PAEK-60-im) shows low water uptake of 24.9% at 80 °C and desirable ion conductivity of 22.01 mS cm –1 at 30 °C. In NaCl removal application of ED, PAEK-60-im shows the NaCl removal ratio of 69.66% within 120 min, outperforming commercial AEM-Type II (68.98%). Accordingly, it has a higher current efficiency of 83.7% but lower energy consumption of 5.9 kWh kg –1 , compared with the commercial one (82.0%; 6.6 kWh kg –1 ). In particular, in selectrodialysis application, possibly owing to the synergistic effect of pore-size sieving effect resulting from macro-separation morphology and hydration energy difference of SO 4 2– ions (–1000 kJ mol –1 ) and Cl – ions (–317 kJ mol –1 ) in feeding solution, PAEK-60-im shows significantly superior monovalent anion perm-selectivity (Cl − /SO 4 2− ) of 7.70 at 30 min, relative to commercial anion-selective Neosepta ACS (5.27) and many other reported mono-valent anion selective AEMs having elegant surface modified layers. The superior ED performance of the homogeneous PAEK-60-im is suggestive of its potential separation application.
研究领域:
材料科学
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化学工程
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电化学
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膜技术
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ATMOSPHERIC ENVIRONMENT
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2020
·
IF 4.039
Zhibo Xie,Huaqiao Gui,Jiaoshi Zhang,Jiejie Bian,Xuejun Gu,Hang Xiao,Da-Ren Chen,Jianguo Liu
Significant contribution of ultrafine particles in the atmosphere to the cloud condensation nuclei and precipitation has been evidenced. The correlation between the condensation growth and chemical composition of particles is essential in the atmospheric studies. To reduce the lower detection limit of ATOFMS (currently at 200 nm), a water-based particle size amplifier, consisted of a tubing inner-lined with an expanded polytetrafluoroethylene layer and temperature-controlled in three sections, was designed, and its amplification performance was evaluated. With the use of the particle size amplifier, the peaks of Na and Cl in the mass spectra of 50 nm NaCl particles were obviously observed. Further, 50 nm NaCl/Dicarboxylic Acid (DA) particles were generated and characterized by ATOFMS with the amplifier and the sizes of ultrafine particles after the amplifier was measured by an Aerodynamic Particle Spectrometer (APS). It is found that the Cl/Na ratio in 50 nm NaCl + DA particles was negatively correlated with the DA concentration and positively correlated with the acidity coefficient of the DAs, i.e., the high DA mass fraction in particles and low the acidity coefficient of DAs results in strong heterogeneous reaction in the generation of these particles. The amplified sizes of NaCl + DA nanoparticles was also greatly influenced by the degree of the reaction involved. The Cl/Na ratio of NaCl + DA particles was found to have positive correlation with the amplified size of particles.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2026
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IF 6.6
Xianyou Tang,Yunkun Lu,Hang Yin,Guannan Zhou,Lili Guo,Wenguan Liu,Zhongfeng Tang
Effect of SO 4 2 ‐ in NaCl-MgCl 2 on corrosion of 316SS was first studied at 600 °C. • Intergranular corrosion became more obvious with increased SO 4 2 ‐ concentration. • Corrosive of 316SS increased continuously with SO 4 2 ‐ concentration increased. • SO 4 2 ‐ concentration in NaCl-MgCl 2 salt should be controlled within 0.05% in Ar. NaCl-MgCl 2 molten salts are promising heat transfer fluids and thermal energy storage media for next-generation concentrating solar power (CSP) systems. However, the corrosion of the stainless steel in NaCl-MgCl 2 molten salt containing sulfate impurities remains a significant challenge for practical application. In this work, the corrosion behavior of 316 stainless steel (316SS) was systematically investigated in NaCl-MgCl 2 (58.0-42.0 mol%) eutectic molten salts containing 0.005-5.0 wt% SO 4 2− at 600 °C for 240 h under Ar. The corrosion of 316SS samples increased markedly with SO 4 2− concentration. At low impurity levels, only slight surface degradation and limited elemental depletion were observed. In contrast, elevated SO 4 2− concentrations caused severe corrosion-layer degradation, accelerated selective dissolution of Cr and Fe, and pronounced localized and intergranular corrosion. A critical impurity threshold of 0.05 wt% SO 4 2− was identified, beyond which the weight loss increased sharply to 1.96 mg cm −2 and significant intergranular attack developed. Furthermore, increasing the SO 4 2− concentration from 1.0 to 5.0 wt% promoted the transition from localized corrosion to extensive grain-boundary penetration. Mechanistic analysis indicates that sulfur-induced precipitation of Mo–S- and Mn–S-containing species, together with selective alloy dissolution, destabilizes the protective corrosion layer through a synergistic sulfidation-oxidation mechanism. These findings establish a practical sulfate impurity limit for NaCl-MgCl 2 salts and provide important guidance for molten salt purification, impurity control, and structural material selection in CSP thermal energy storage systems.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2026
·
IF 2.4
Jingli Sun,Lu Chen,Xuqiang Li,Siyu Zheng,Shaolong Dong,Yue Wang,Houchun Yan,Yingmin Yu
This study investigates the influence of different mass concentrations of NaCl (0, 1, 5, and 10 wt %) on the liquid–liquid equilibrium of the ternary system {water + pyridine + 2-ethyl-1-hexanol} at 298.2 K temperature and 101.3 kPa atmospheric pressure. Experimental results show that the distribution coefficient and separation factor of pyridine increase continuously with increasing salt concentration. This indicates that the addition of inorganic salt reduces the mutual solubility between water, pyridine, and 2-ethyl-1-hexanol, thereby promoting phase separation and facilitating the selective extraction of pyridine from the aqueous phase by 2-ethyl-1-hexanol. Optimal extraction performance was achieved at a NaCl mass fraction of 10%. Compared to the salt-free system, the pyridine distribution coefficient increased by (11.19–115.43)%, and the separation coefficient improved by (55.46–169.99)%. The NRTL and UNIQUAC thermodynamic models are used to correlate the LLE data, and their model parameters are regressed. Statistical analysis indicates that both models can well predict the phase equilibrium behavior. Verification with the GMcal_TieLinesLL tool shows that the regressed parameters meet the Gibbs stability criterion, confirming the reliability of the models.
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