JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2017
·
IF 2.323
Yunxue Gao,Shuni Li,Quanguo Zhai,Yucheng Jiang,Mancheng Hu
Complete phase diagrams and physico-chemical properties for the ternary system (CsCl + NaCl + H2O) were determined at T = (298.15, 308.15, and 318.15) K, respectively. The X-ray diffraction method and Schreinemaker’s wet residue method were used to verify the solid phase. The phase diagrams show this ternary system is a complex type. Three crystallization regions were found corresponding to the single salt NaCl, a compound CsCl·2NaCl·2H2O, and a solid solution series [Cs1–x(Na·H2O)x]Cl (x in [Cs1–x(Na·H2O)x]Cl changed from 0 to 0.43 (298.15 K), 0.39 (308.15 K), and 0.36 (318.15 K) at each temperature. With rising temperature, the crystallization area of NaCl increased, but CsCl·2NaCl·2H2O and [Cs1–x(Na·H2O)x]Cl decreased simultaneously. However, density and refractive index increased with increasing CsCl concentration.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Chengxin Xiang,Yulu Kang,Xiehui Peng,Yunqi Wang,Ruth Antwi-Baah,Yao Rao,Shuxia Xu
The development of highly specific rapid detection method for antibiotics residue was critically imperative in complex environmental samples was due to its environmental and health risk. Here, a highly specific biomimetic Fe 3 O 4 @SiO 2 -formylphenylboronic acid molecular imprinted polymer (FS-FPBA MIP) was constructed, which was coupled with gold nanoparticle-based colorimetric sensor, for rapid detection of antibiotics Kanamycin (Kana) in fish pond. Firstly, a boronate affinity-controlled oriented surface imprinting strategy was employed to immobilize Kana as the template molecule onto a Fe 3 O 4 @SiO 2 substrate functionalized with boronic acid, resulting in a MIP layer with a well-defined thickness. Subsequently, when NaCl and Kana sample were added to gold nanoparticles (AuNPs), the FS-FPBA MIP specifically recognized Kana. Accordingly, the color of AuNPs solution quickly changed from wine red to dark blue due to charge shielding and charge neutralization effects. By taking a photo with a smartphone and using the software “Color Identifier” to read the RGB data, a rapid visual detection of Kana was achieved. The FS-FPBA MIP-colorimetric sensor exhibited a desirable linear response for Kana in the concentration range of 0-150 nM, with a low detection limit of 4.3 nM (3 σ / k ). Finally, the magnetic FS-FPBA MIP was successfully applied for selective extraction and colorimetric detection of different Kana samples in pond water, sediment, and surrounding soil with the relative recoveries ranging from 90.03% to 104.53%. This highly specific enrichment and visual sensor offered a promising biomimetic recognition platform for rapid detecting antibiotic residues.
研究领域:
环境科学
·
分析化学
·
纳米技术
·
分子印迹
·
生物传感器
·
抗生素检测
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2015
·Vol. 23
·期 4
·3399-3405
·
IF 2.828
Yang Bin,Li Zhongjian,Lei Lecheng,Sun Feifei,Zhu Jingke
The solubilities of 19 different kinds of N-heteroaromatic compounds in aqueous solutions with different concentrations of NaCl were determined at 298.15 K with a UV-vis spectrophotometry and titration method, respectively. Setschenow constants, K
s , were employed to describe the solubility behavior, and it is found that the higher ring numbers of N-heteroaromatics gave rise to the lower values of K
s . Moreover, K
s showed a good linear relationship with the partial charge on the nitrogen atom ( Q
N ) for either Q
N > 0 or Q
N < 0 N-heteroaromatics. It further revealed that Q
N was well-matched in the prediction of salting-out effect for N-heteroaromatics compared to the conventional descriptors such as molar volume ( V
H ) and the octanol-water partition coefficient ( K
ow ). The heterocyclic N in N-heteroaromatics may interact with Na + ions in NaCl solution for Q
N < 0 and with Cl − for Q
N > 0.
研究领域:
物理化学
·
药物化学
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NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 27
·12146-12152
·
IF 2.7
Henan Zhang,Qi Liu,Alena Novoselova,Valeri Smolenski,Kewei Jiang,Yongde Yan,Milin Zhang,Jun Wang
The reactions of oxygen and samarium ions in molten NaCl–2CsCl eutectic in the temperature range of 823–913 K have been investigated by potentiometric titration in an inert gas atmosphere. The activity of oxygen ions in the studied melts was monitored using a standard YZME (indicator) electrode based on Y2O3-stabilized ZrO2 with a solid–electrolyte membrane. The titration of Sm3+ by O2− ions demonstrated the formation of insoluble SmOCl compounds in the investigated region. The mechanism of formation of SmOCl and Sm2O3 was established by the analysis of potentiometric titration curves. Subsequently, the solubility of SmOCl and Sm2O3 in the melt was calculated using the material balance equation and solubility constant equation. Finally, the basic thermodynamic properties of SmOCl and Sm2O3 in molten NaCl–2CsCl eutectic were calculated, and the properties of samarium in the melt were summarized using the Pourbaix-type (E-pO2−) diagram to determine the kinds of stabilized samarium compounds. Furthermore, the optimal chlorination conditions can be obtained from the E-pO2− diagram of Sm.
研究领域:
化学
·
材料科学
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JOM
·
2018
·Vol. 70
·期 4
·575-580
·
IF 2.145
Zhou Zhongren,Zhang Yingjie,Hua Yixin,Xu Cunying,Dong Peng,Zhang Qibo,Wang Ding
The effect of CaO content on the preparation of ferrotitanium alloys from ilmenite with the method of the electrolysis-assisted calciothermic reduction has been investigated by use of ilmenite powders as raw materials that positions them next to the cathodic molybdenum plate,
equimolar CaCl 2 -NaCl molten salt with 2–7 mol.% CaO as electrolyte and graphite as anode at 700°C with cell voltage of 2.8 V under argon atmosphere.
It is demonstrated that increasing the reactant CaO content is beneficial to the calciothermic reduction of ilmenite and the intermediate CaTiO 3 . Experimental results also show that after 14 h of calciothermic reduction process, the products are ferrotitanium alloys and the specific energy consumption is only about 10.21 kWh kg −1 when adding 5 mol.% CaO into equimolar CaCl 2 -NaCl molten salt and approximately 14.40 kWh kg −1 when CaO content is increased to 7 mol.%.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9
Yanghao Huang,Xiaoting Hong,Chengyue Wang,Kwan San Hui,Junjie Pan,Junye Guo,Yueling Tao
In the C₄ alkylation process, waste chloroaluminate ionic liquid (CIL) catalysts pose significant environmental risks due to their strong acidity, toxicity, and extreme reactivity. Upon contact with water, these waste CILs undergo violent, self-accelerating hydrolysis reactions that release large amounts of heat and hydrochloric acid mist, leading to severe secondary pollution. To address this issue, this study proposes a novel “zero acid mist” hydrolysis treatment strategy that ensures the safe and environmentally friendly disposal of waste CILs under optimized reaction conditions. The results demonstrate that pretreating the waste CIL with dichloromethane (DCM) at a 1:1 volume ratio, followed by reaction with a 15 wt% NaCl aqueous solution (3:40 mass ratio) at 5 °C for 30 min, effectively suppresses reaction intensity and minimizes acid mist emissions. Enthalpy analysis confirms that these optimized conditions significantly reduce the reaction heat. The subsequent neutralization of the acidic hydrolysate with a 3 wt% NaOH solution (25,57 volume ratio) achieves pH = 7, yielding high recovery rates of 98.96 % for Al 3+ and 95.37 % for Cu 2+ . After calcination, the recovered solids were confirmed to be copper–aluminate spinel (CuAl₂O₄). Cyclic experiments further determined the optimal reuse frequency of the neutralized solution. The mechanistic investigation revealed that the combined DCM solvation and NaCl-mediated common-ion effect underpin the “zero acid mist” phenomenon. This process not only mitigates secondary pollution but also enables efficient metal recovery and solution recycling, establishing a closed-loop treatment system consistent with circular economy principles. The proposed method offers a simple, safe, and sustainable solution for the harmless treatment and resource utilization of waste CILs in the petrochemical industry.
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Journal of Magnesium and Alloys
·
2026
·
IF 15.8
Qinyang Ma,Jing Chen,Guanzhen Mu,Wenjia Wang,Lu Jiang,Longxu Liu,Yan Dong,Xin Liu
The corrosion inhibition performance of sodium fumarate, sodium 2,6-pyridinedicarboxylate, and sodium benzoate was investigated on both bare AZ91D magnesium alloy and micro-arc oxidation (MAO)-treated AZ91D magnesium alloy in 3.5 wt.% NaCl solution. All three inhibitors effectively enhanced the corrosion resistance of the substrates, with high corrosion inhibition efficiency and charge transfer resistance. The inhibition mechanism was attributed to the formation of an adsorption film between the Mg 2+ and COO − , which suppressed the generation of corrosion products such as Mg(OH) 2 , further forming a protective film mainly composed of MgO. Among the three inhibitors, sodium fumarate demonstrated better inhibition performance with a more complete protective layer and fewer corrosion products formed, which may be due to its dual carboxyl groups and unsaturated and flat molecular structure. For the MAO-treated magnesium alloy, the inhibitors provided sequential protection by first adsorbing onto the surface and within the pores of the MAO coating and subsequently protecting the underlying alloy after coating degradation. This study offers valuable insights into the selection of carboxylate corrosion inhibitors for magnesium alloys and supports the development of anticorrosion strategies based on micro-arc oxidation coatings combined with corrosion inhibitors.
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SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Xiaopeng Hu,Sai Liu,Qing Liu,Yang Su,Junyao Wu,Zhihang Xie,Jinwei Guo,Wang Zhu
The service life of thermal barrier coatings (TBCs) in calcium magnesium aluminosilicate (CMAS) and molten salt environments has become a key factor in determining engine reliability and safety. The effect of interface roughness (bond coating surface roughness) on the CM (CMAS + molten salt (Na 2 SO 4 + NaCl + NaVO 3 )) corrosion resistance of electron beam physical vapor deposition (EB-PVD) TBCs is investigated. The addition of molten salts lowers the melting point of CM, leading to more severe destructive effects compared to single CMAS corrosion. Moreover, the 1200# specimen (Ra = 2.0 μm) exhibits the best resistance to CM corrosion. The adjustment of interface roughness significantly alters the microstructure of the top-ceramic coating and induces changes in crack patterns after CM corrosion. Therefore, appropriately reducing interface roughness is key to improving the isothermal CM corrosion resistance and high-temperature CM corrosion-induced thermal shock performance of TBCs.
研究领域:
材料科学
·
腐蚀与防护
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Luo Tang,Mengsa Li,Guohua Zhao,Fayin Ye
There is an increasing demand for obtaining pectin from new sources. Red radish ( Raphanus sativus L . ) pomace pectin extracted by alkali was low-methoxyl pectin with esterification degree of 10.17 %, galacturonic acid content of 69.71 % (wt), and average molar weight of 78.59 kDa. The pectin primarily consisted of rhamnogalacturonan I and homogalacturonan domains. The predominant monosaccharides of the pectin were galacturonic acid (46.32 mol%), arabinose (16.03 mol%), galactose (10.46 mol%), and rhamnose (10.28 mol%), respectively. The red radish pomace pectin solution exhibited a shear-thinning behavior. NaCl could induce gelation of red radish pomace pectin, and the gel properties of red radish pomace pectin were considerably affected by the NaCl concentration. As the NaCl concentration (0.25–0.50 mol/L) increased, the rate of gelation accelerated, and the time to gelation point appeared earlier. There was an optimal NaCl concentration (0.50 mol/L) for the pectin to form a gel with the greatest solid-like properties, gel hardness (33.84 g) and water-holding capacity (62.41 %). Gelation force analysis indicated gel formation mainly caused by electrostatic shielding effect of Na + and hydrogen bonding. This research could facilitate the applications of the red radish pomace pectin in the realm of edible hydrocolloids .
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PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Hao Lu,Hanyu Feng,Yang Zhou,Huidong Qiu
As an important derivative of graphene, graphene oxide(GO) is widely applied in multiple fields due to the abundant active sites and large specific surface area. In this paper, phytic acid(PA) had been chosen to modify the simple aniline trimer(AT) integrate with GO for acquiring a significant improvement of marine corrosion protection . Moreover, waterborne polyurethane(WPU) was used as a coating substrate to prepare a novel kind of functional coating on metal with nontoxicity. An enhanced electrical performance had been discovered through the combination of PA-AT and GO, which could be attribute to the unique 2-dimensional structure and π-π* interactions between GO and PA-AT. Then, the results of electrochemical measurements performed in 3.5 wt% NaCl solution showed an excellent corrosion protection when the ratio of GO to PA-AT stood at 1:3. Meanwhile, the most significant protective effect was observed with a dosage of 0.8 g of GO/PA-AT compared with the pure WPU. Similarly, the hardness, adhesion and impact resistance, and contact angle of GO/PA-AT coating also obtained a significant improvement based on the performance measurement. As a result, GO/PA-AT composite could provide an efficient protective performance against electrolyte diffusive corrosion in this paper.
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Journal of Materials Research and Technology-JMR&T
·
2023
·
IF 6.4
Sijie Liu,Renda Wang,Li Wang,Fangfang Ge,Mengyu Gao,Yang Si,Bingsheng Li
In this work, static immersion and gravimetric methods were used to study the corrosion behavior of three common stainless steels and four Ni-based alloys in a NaCl–MgCl 2 –KCl mixed molten salt under vacuum atmosphere. The corrosion test was conducted at 700 °C, with a maximum exposure time of 100 h. Corrosion behavior was determined by measuring the mass loss of the sample at different time intervals and the corrosion rates at 100 h. The microstructure of the alloy was analyzed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), atomic force microscope (AFM), and X-ray diffraction (XRD). The results showed that stainless steels were generally more severely corroded than Ni-based alloys. 304 stainless steel and In800H exhibited the worst corrosion resistance, whereas Ni-based alloy In625 had the best corrosion resistance. Fe and Cr were dissolved in the molten chloride salts and reacted with the molten chloride salts. Mo played a positive role in suppressing the corrosion of the alloys in molten chloride salts by inhibiting the outward diffusion of the elements.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Liwei Zhuang,Qinqin Hu,Shujing Wang,Ruyi Lin,Dan Li,Yong Ma,Lingzong Meng,Jiaoyu Peng
The solid–liquid phase equilibria of brine systems containing boric acid are the theoretical basis for the development of boric acid from brine resources. The phase equilibria of the systems NaCl–CaCl2–H3BO3–H2O and CaCl2–H3BO3–H2O at 323.15 K were investigated by the isothermal solution method. The phase diagram for the ternary system is composed of one co-saturation point, two univariant solubility curves, and two singe-salt crystallization fields of CaCl2·2H2O and H3BO3. The dry-salt phase diagram for the quaternary system consists of one invariant point, three univariant solubility curves, and three single-salt crystallization fields for NaCl, CaCl2·2H2O, and H3BO3. In the phase diagrams of the quaternary system at 298.15 and 323.15 K, the areas of sodium chloride and calcium chloride salt regions are enlarged, whereas the area of the H3BO3 region is diminished significantly with the increase of temperature. Using the Pitzer model, the lacking Pitzer parameters for H3BO3 were obtained by fitting the solubilities in the CaCl2–H3BO3–H2O system. The calculated solubilities with the Pitzer model were in accord with the experimental data.
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