CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Yuan-Pei Lan,Chaoyi Chen,Junqi Li,Xuewen Xia,Xisong Mao,Hao Zhou
Homogeneously Eu 3+ doped LaOCl single crystals are firstly synthesized in a molten KCl-LiCl flux, and the well-shaped LaOCl:Eu 3+ polyhedral micro-plates exhibit noticeable luminescent properties. The bulk LaOCl:Eu 3+ micro-plate with a width of 1.03 μm and 1.37 μm in length shows a single crystal characteristic with the crystal face orientation of [00 1 ‾ ]. Both XRD patterns and EDS mapping indicate that the Eu 3+ ions have been homogeneously doped into LaOCl lattice. LaOCl:Eu 3+ nucleuses generated in molten KCl-LiCl flux at even 350 °C benefited to the decomposition of La(OH) 3 :Eu 3+ precursor, and polyhedral LaOCl micro-plate is easily formed in molten KCl-LiCl salt due to the solid-ionic reaction and crystal growth. The luminescent properties of LaOCl:Eu 3+ are firstly enhanced and then weakened with the increasing concentration of the doped Eu 3+ , 6% Eu 3+ doped LaOCl:Eu 3+ exhibits the best luminescent properties which can be used as a potential LED material.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Yuncong Ding,Xiaorui Xu,Xinyu Zhang,Chengyu Wang,Wentao Zhou,Yafei Wang
In the present study, cyclic voltammetry was performed to investigate CeCl 3 in a LiCl-KCl eutectic molten salt at various concentrations. The results indicate that the overlap degree of cyclic voltammograms at different cycles deteriorates with the increasing CeCl 3 concentration in the molten salt. This phenomenon was attributed to higher concentrations of CeCl 3 , which led to a non-uniform film on the electrode surface. This was evidenced by material characterization of the working electrode after cyclic voltammetry (CV) testing and the simulated cyclic voltammograms of a reversible electrochemical reaction. This study will provide new insights that enhance our understanding of the electrochemistry of the CeCl 3 -LiCl-KCl system and offer valuable reference for other soluble-insoluble electrochemical systems.
研究领域:
物理化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 8
·082512
·
IF 4.316
Nan Ji,Tiejian Zhu,Hao Peng,Feng Jiang,Wei Huang,Yu Gong
In the common spent fuels, actinides and fission products are generally in the form of oxide, so direct dealing with oxide will be the most convenient way for spent fuel reprocessing. In this work, the electrolytic reduction of Gd2O3 has been studied in LiCl-KCl-Li2O (1 wt%) melts at different conditions, and the effect of sintering temperature on the porosity of Gd2O3 powder and the electrochemical behavior of Li2O in LiCl-KCl molten salt were investigated, too. The diffusion coefficient of O2− was calculated to be 2.0 × 10−5 cm2·s−1 in LiCl-KCl melts on the Mo electrode at 923 K by cyclic voltammetry (CV). The electrode process of Gd2O3 powder was also analyzed in LiCl-KCl-Li2O (1 wt%) melts, and the formation process of composite oxide LiGdO2 was determined. By the analysis of XRD and oxygen content characterization, it was suggested that after 74 h electrolysis (923 K, 3.40 V), the oxygen content of Gd2O3 cathode decreased from 12.25 wt% to 1.41 wt%, indicating 88.5% Gd2O3 was reduced to metal.
研究领域:
核化学与核燃料循环
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电化学
✓ 已验证
DOI
高影响因子
FOOD SCIENCE AND TECHNOLOGY RESEARCH
·
2017
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IF 0.459
Liangzhi Li,Lina Gu,Xin Ju,Cuiying Hu,Jiaolong Fu,Hongying Cheng,Pei Kang
This study investigated the production of erythritol by Trichosporonoides oedocephalis in response to the varying osmotic pressure. Osmotic pressure was exerted by adding NaCl or KCl into the fermentation broth. It was demonstrated that appropriate raise in osmotic pressure enhanced erythritol production, wherein 5 g/L KCl addition increased erythritol yield by 44.21% compared to the control. The reason for the significant increase in the erythritol production showed that the 5 g/L KCl addition accelerated the glucose utilization in the late period of fermentation time. It was also revealed that 5 g/L KCl increased the activity of erythrose reductase (ER) in the same fermentation period. In bioreactor, the erythritol yield with initial 5 g/L KCl addition was up to 50.54 g/L, which was 47.69% higher than the control (34.22 g/L). The study provided a novel fermentation regulation, that is, economical addition of KCl made more effective production of erythritol when using T. oedocephalis.
研究领域:
微生物学
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发酵工程
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生物技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 76
·40352-40358
·
IF 3.708
Xing Li,Yong-De Yan,Mi-Lin Zhang,Yun Xue,Hao Tang,De-Bin Ji,Zhi-Jian Zhang
The electrochemical reduction of Nd(III) was investigated on an inert W and a liquid Al electrode in molten NaCl–KCl eutectic salt. On both W and liquid Al electrodes, the reduction of Nd(III) ions to Nd(0) metal occurred in a single reaction step, which avoids the corrosion reaction: 2Nd(III) + Nd → 3Nd(II). Therefore, corrosion of Nd metal in this molten chloride media is not expected. The co-reduction behavior of Nd(III) and Al(III) ions was studied on a W electrode in NaCl–KCl–AlCl3–NdCl3 melts. Five kinds of Al–Nd intermetallic compound were detected via cyclic voltammetry and open circuit chronopotentiometry. Intermittent galvanostatic electrolysis was employed on liquid Al electrodes to extract Nd in the form of Al–Nd alloys in NaCl–KCl–NdCl3 melts. Nd, AlNd3, Al2Nd, and AlNd phases were identified by X-ray diffraction (XRD). With the increase of electrolytic time, the content of Nd-rich Al–Nd intermetallic compounds in the Al–Nd alloy increased. The morphology and micro-zone chemical analysis of the deposits were characterized by a scanning electron microscope (SEM) equipped with an energy dispersive spectrometer (EDS), and the Al11Nd3 phase was confirmed by EDS analysis.
研究领域:
冶金学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 7
·1246
·
IF 3.4
Wenjuan Qi,Desheng Ding,Weijie Luo,Weiliang Jin,Qian Kou,Chuntao Ge,Saijun Xiao
The hardness and wear resistance of amorphous Al–Mn alloy coatings can be improved by incorporating ceramic particles into them to extend their application. In this paper, Al–Mn/WC composite coatings have been prepared with electrodeposition in stirred AlCl3–NaCl–KCl–MnCl2molten salts at 180 °C with the addition of WC particles. The effects of stirring speed (400–700 rpm) and cathode current density (15–75 mA/cm2) on the produced Al–Mn/WC composite coatings have been studied. At 600 rpm and 700 rpm, the Al–Mn/WC composite coatings exhibited the best uniform distribution of the embedded WC particles, with the tested microhardness value up to 650 HV0.1, compared with 530 HV0.1of the Al–Mn alloy. Moreover, under various cathode current densities, the best quality of the Al–Mn/WC composite coating was obtained at 55 mA/cm2, with a homogeneous distribution of WC particles and the highest microhardness value (670 HV0.1). It is expected that this method could be extended to be applied for the preparation of aluminum-based and magnesium-based ceramic composite coatings.Keywords:AlCl3–NaCl–KCl–MnCl2molten salts;electrodeposition;WC particles;Al–Mn/WC composite coating
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2021
·
IF 3.927
Hongbing Song,Lei Liu,Haozhong Wang,Bingxiao Feng,Meng Xiao,Yubao Tang,Xiaofei Qu,Hengjun Gai,Tingting Huang
The development of a photocatalyst with high activity, large specific surface area and precise band gap adjustment is the focus of the field of photocatalysis in realizing energy conversion and improving environmental issues. In this paper, a simple synthesis process for co-doping of KCl and NH 4 Cl to precisely adjust the band gap of g-C 3 N 4 was developed. Various characterization results show that doping with KCl and NH 4 Cl can reduce the band gap of the carbon nitride , increase its visible light absorption, improve its carrier separation efficiency, thus showing good photocatalytic activity . Cl and K enter the g-C 3 N 4 layers via intercalation and form a dual-element charge transport channel between these layers, thereby facilitating the transport of electrons. The introduction of NH 4 Cl increases the specific surface area of the composite, thus providing abundant adsorption and reaction sites. The co-loaded photocatalyst CN-NH 4 Cl-0.05KCl was used to degrade rhodamine B (RhB) and tetracycline (TC) and showed excellent photocatalytic activity. A possible mechanism of photocatalytic degradation is proposed based on the analytic results.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Tianjun Xu,Rongchao Li,Tengfei Zhang,Yuhan Li,Hulin Zhang,Zhongyun Yuan,Kai Zhuo
In this study, gallium oxide hydroxide (GaOOH) nanorods were synthesized using a hydrothermal method, which was followed by a high-temperature nitriding process to synthesize gallium nitride (GaN) nanorods. Then, potassium chloride (KCl)-modified GaN nanorod composite materials were prepared using the physical mixing method. The analysis of the humidity sensitivity test demonstrated that the KCl/GaN nanorods with a KCl loading of 2.5 wt% exhibited the best humidity sensitivity, with a resistance change response of 36589.59 under 97% relative humidity (RH), which was 2.51 times that of pure GaN nanorods without KCl doping. The response and recovery times of the KCl/GaN-2.5- wt% nanorod humidity sensor in a 97%-RH environment were 3 s and 80 s, respectively. The response time did not exhibit considerable fluctuations compared with the undoped GaN nanorods, and the recovery time increased. The hierarchical morphology of the GaN nanorods created abundant adsorption sites for water molecules, while the incorporation of KCl enhanced the electrical conductivity of the composite material, thereby resulting in an increase in the magnitude of the resistance changes of the sensor in environments with different humidity conditions. The sensor also demonstrated excellent repeatability and long-term stability, making it suitable for applications in respiratory monitoring.
研究领域:
材料科学
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电子工程
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Rui-Zhi Cui,Wu Li,Ya-Ping Dong
The phase equilibria relationship between the quaternary system LiCl–KCl–Li2SO4–K2SO4–H2O and its subsystems LiCl–KCl–H2O and LiCl–Li2SO4–H2O was studied by the isothermal dissolution equilibrium method at 288.15 K, and the corresponding phase diagrams were drawn. At 288.15 K, ternary systems LiCl–KCl–H2O and LiCl–Li2SO4–H2O all belong to the simple type. In the phase diagram of the quaternary system LiCl–KCl–Li2SO4–K2SO4–H2O, there are five equilibrium solid phase crystallization fields: LiCl·2H2O, KCl, Li2SO4·H2O, K2SO4, and Li2SO4·K2SO4. Compared with the multitemperature phase diagrams of this system at 288.15–348.15 K, it was found that the basic configuration of the phase diagrams is the same. As the temperature increased, the phase region of double salt Li2SO4·K2SO4 clearly increased, whereas the phase region of single salt KCl and K2SO4 clearly decreased. On the basis of the experiment, the extended Harvie–Weare model of the Pitzer model was used to predict the solubility data of the quaternary system. The simulated and measured values were basically in good agreement.
研究领域:
化学热力学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2023
·Vol. 42
·期 11
·3886-3896
·
IF 8.8
Xu Can,Hu Xian-Wei,Yu Jiang-Yu,Li Peng-Wei,Liu Ai-Min,Luo Shao-Hua,Shi Zhong-Ning,Wang Zhao-Wen
The knowledge on the ionic structure of YCl 3 -KCl molten system is of guiding significance for the practical production of yttrium metals and yttrium alloys via molten salt electrolysis using this system as electrolyte. In this paper, the theoretical Raman spectra of the ionic groups which may exist in YCl 3 -KCl molten system are simulated by quantum chemical calculation using Gaussian 09 and GaussView 5.0 programs based on density functional theory (DFT). Then the ionic structures of 20 mol%–60 mol% YCl 3 -KCl molten salt systems are studied by comparing the Raman shift values of the bands in the theoretical Raman spectra of different ionic groups with the experimental spectra of this system. YCl 6 3− , Y 2 Cl 7 − , Y 2 Cl 8 2− and Y 2 Cl 9 3− are thought to exist in the molten system. With the increase of temperature, the relative content of YCl 6 3− ionic groups increases while those of Y 2 Cl 7 − , Y 2 Cl 8 2− and Y 2 Cl 9 3− ionic groups decrease. Moreover, the "lifetime" of all ionic groups decreases within the temperature range of 692–730 °C. Meanwhile, the relative contents of Y 2 Cl 7 − , Y 2 Cl 8 2− and Y 2 Cl 9 3− increase with the increase of YCl 3 content, while that of YCl 6 3− decreases. The wave function analysis of the four ionic groups (YCl 6 3− , Y 2 Cl 7 − , Y 2 Cl 8 2− , and Y 2 Cl 9 3− ) is carried out by Multiwfn program. The net charge in each group, the direction of electron migration during the formation of each group, the sites where electrophilic and nucleophilic reactions are most likely to occur in each ionic group, and the order of bond breaking during chemical reactions for the four groups are obtained. Graphical abstract
研究领域:
物理化学
·
无机化学
·
熔盐化学
·
电化学
·
材料化学
·
计算化学
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2018
·
IF 3.024
Hai-bo Zhao,Wen-ting Xu,Qiang Song,Jian-kun Zhuo,Qiang Yao
The migration of K during biomass thermal conversion can cause severe ash-related problems. K2CO3 and KCl are two important inorganic forms of K that appear during biomass thermal conversion. In this study, a fixed-bed reactor was used to investigate the effect of H2O vapor and SiO2 on the migration characteristics of these two inorganic K species. The results showed that K is released through the decomposition of pure K2CO3 during pyrolysis. K release from K2CO3 at 800 °C was not obvious, and the release rate increased significantly with temperature but mainly depended on the decomposition rate of K2CO3. The presence of H2O vapor can promote K release by reacting with K2CO3 and forming volatile KOH. When SiO2 was present, a rapid reaction occurred between SiO2 and K2CO3, and this reaction inhibited the release of K significantly. The reaction rate increased significantly with temperature, and H2O vapor promoted the reaction of SiO2 and K2CO3. In a pyrolysis atmosphere, KCl can be released by direct evaporation and cannot react with SiO2; by contrast, KCl can react with SiO2 to form insoluble K silicates in the presence of steam. With increasing temperature, the release rate of KCl increased faster than the K-silicate formation rate, resulting in a decrease in the proportion of insoluble K silicates generated. The results obtained in this work provide a basis for understanding the migration of inorganic K during biomass thermal conversion.
研究领域:
能源化学
·
燃烧学
·
热力学
·
无机化学
·
环境工程
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2020
·
IF 7.246
Hui Liu,Xiumin Li,Mengya Li,Yafei Zhang,Keyong Tang,Jie Liu,Xuejing Zheng,Ying Pei
The conventional beamhouse of leather making invariably results in serious pollution of sulfide, solid suspension and ammonia nitrogen because of the use of Na 2 S and Ca(OH) 2 in unhairing (liming) and reliming. It is an urgent issue to develop alternatives of the Na 2 S and Ca(OH) 2 system. In this work, the K + and Cl − of Hofmeister series are chosen to improve the binding ability of dispase to water molecules and substrate, which can further enhance the unhairing/fiber opening effect of dispase, with only one step for unhairing, opening collagen fiber-bundles and bating. The cycle unhairing effect of K + /Cl − /dispase solution system and its unhairing waste-water recycling in fiber opening are studied. The effect of K + and Cl − on the penetration of dispase in bovine hides, the hydrolysis for proteoglycans and elastic fibers, and the opening effect for collagen fiber-bundles are analyzed systematically. The results indicated that, the K + and Cl − increase the stability of dispase activity to 12 times of recycling for unhairing. Due to the electrostatic attraction of K + and Cl − to the charged amino acid residues, both the penetration of dispase in bovine hides and the hydrolysis of proteoglycans and elastic fibers are accelerated, and an easy step for unhairing/fiber opening is realized. Only 30 h is needed for unhairing/fiber opening, and the waste-water can be recycled for unhairing too. Because of the reuse of unhairing waste-water, low pollutant loads , high collagen fibril dispersity are reached. The resultant leathers are good in physical properties, and their thermal stability are comparable to that by the conventional process. The leather making system of KCl/dispase is suggested to be a cleaner and greener technology than the conventional ones.
研究领域:
化学工程
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）