JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 10
·102505
·
IF 4.316
Chenteng Sun,Qian Xu,Yongxiang Yang,Xingli Zou,Hongwei Cheng,Xionggang Lu
The electrochemical behaviors of Li+ and Nd3+ were investigated on W, liquid Sn pool and Sn film electrodes in LiCl-KCl-NdCl3 melt at 673 K. Various electrochemical techniques, such as cyclic voltammogram, square wave voltammogram, and open circuit chronopotentiometry, were conducted to evaluate the electrochemical behaviors of Li+ and Nd3+. The reduction of Nd3+ was found to be a two-step process in the W electrode and a one-step process in the liquid Sn electrode. During the formation of the Nd-Sn intermetallic compounds, only the NdSn3 would be formed without the reduction of the Li+ in the liquid Sn electrode. When the reduction potential moves over −2.77 V vs Cl2/Cl−, the Li+ in the electrolyte would inevitable be reduced into the liquid Sn electrode. The Nd-Sn intermetallic compounds were deposited on the liquid Sn pool electrode at −2.74 V vs Cl2/Cl− in the LiCl-KCl-NdCl3 melts for 5 h. The products were characterized by SEM-EDS and XRD. The loose product on the surface of the deposition displayed the existence of NdSn3 in Nd-Sn intermetallic compounds. The high content of Nd inclusion formed by segregation was detected in the solidified Sn electrode.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Ying Huang,Minhua Su,Ying Zhou,Diyun Chen,Zuopeng Xu,Hongguo Zhang,Changzhong Liao
In this research, well-crystallized lithium chloride (LiCl) intercalated graphite carbonitride (g-C 3 N 4 ) nanotubes (LiCl–CN) as ceramic films have been rationally designed and fabricated through the molten salt preparation. The as-synthetic material exhibited nanotube morphology and showed significantly enhanced photocatalytic performance on the degradation of bisphenol A (BPA) compared with g-C 3 N 4 in the presence of simulated solar light. The catalytic performance of LiCl–CN was remarkably improved due to the structural alteration of g-C 3 N 4 . The results demonstrated 100% BPA could be effectively removed with 0.3 g/L LiCl–CN at pH 5.0 in this investigated reactive system, and the degradation behavior was consistent with pseudo first order reaction kinetic model. Besides, LiCl–CN photocatalyst exhibited excellent photostability and recyclability for BPA photolysis. Mechanistic study revealed that both superoxide radicals (·O 2 - ) and photogenerated holes (h + ) were the dominant activated species for the degradation of BPA by LiCl–CN. The findings of this work further open an avenue for the application of g-C 3 N 4 based ceramics materials for organic pollutant removal from wastewater.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Shuai Liang,Xiaowei He,Fei Wang,Wangchang Geng,Xin Fu,Jing Ren,Xingmao Jiang
LiCl–Pebax 2533 composite nanofibers with different amounts of LiCl·H 2 O have been successfully synthesized by an electrospinning method. Humidity sensing properties, including the impedance versus relative humidity (RH), humidity hysteresis, and response and recovery time of these composites have been investigated. These results indicated that LiCl-added material possessed higher humidity sensitivity and LiCl–Pebax 2533 composite with LiCl·H 2 O content at 44.4 wt% displayed the best humidity sensing property. The impedance of the sensor changed nearly four orders of magnitude when the relative humidity changed from 11% RH to 95% RH and the hysteresis can be neglected. Furthermore, the response and recovery time of the sensor was 30 s and 80 s, respectively. Humidity sensing mechanism was analyzed by complex impedance spectra and the corresponding equivalent circuit.
研究领域:
材料科学
·
传感器技术
·
纳米材料
·
生物医学工程
·
环境监测
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yijie Duan,Yifu Gao,Zetao Ren,Yehui Li,Zhichun Si,Hongda Du,Yanbing He,Dong Zhou,Wei Lv,Feiyu Kang
Water scarcity has become a global problem and caused a lot of conflicts. Atmospheric water harvesting (AWH) is a promising way to address water shortage issue. However, traditional adsorbent materials such as silica gels and zeolites suffer from low water productivity and high regeneration temperature. Hygroscopic salts like LiCl are regarded as a perspective substitution. Salt-modified metal organic frameworks (MOFs) and hydrogels are employed to alleviate the salt aggregation but they are limited to expensive fabrication or sluggish adsorption kinetics. Herein, we demonstrate an asymmetric double-layer design of LiCl@CC (carbon cloth)/PAM with separated function of water adsorption/desorption and water storage in different layer. This double-layer design not only enhances the mechanical properties but also shows an improved water adsorption kinetics compared to common salt-composite hydrogels. In experimental test, the LiCl@CC/PAM exhibits excellent water uptake of 1.5 g g −1 under 60 % RH in 4 h and fast water desorption under sunlight in 1.5 h. In outdoor test, LiCl@CC/PAM based device presents a daily water uptake of 5.12 g g −1 day −1 . Meanwhile, all the materials used and fabrication process are feasible to scale up, which provides a possible solution to the global crisis of water scarcity.
研究领域:
材料科学
·
环境科学
·
水资源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 14
·146508
·
IF 3.721
Shaolong Li,Yusi Che,Jianxun Song,Yongchun Shu,Jilin He,Baoqiang Xu,Bin Yang
Thermodynamic and kinetic properties of Mg(II) in LiCl-KCl eutectic melt were investigated by electrochemical techniques. The diffusion coefficients of Mg(II) in the melt at various temperatures were studied by cyclic voltammetry, and the activation energy of Mg(II)/Mg was calculated to be (48.5 ± 3.7) kJ mol−1. The exchange current densities and reaction rate constants of Mg(II)/Mg at different temperatures from 773 K to 873 K were calculated by testing polarization curves on Mo electrode, and results showed that the exchange current densities became larger as the temperature increased. Equilibrium potentials of Mg(II)/Mg on Mo electrode and liquid Zn electrode were also tested by open circuit potential method. Subsequently, the apparent standard potential of Mg(II)/Mg, apparent standard Gibbs energy for the formation of MgCl2 and activity coefficients of Mg in the liquid Zn were calculated. Finally, metallic Mg was extracted in the form of Zn-Mg alloys by galvanostatic electrolysis on liquid Zn electrode. The deposit was analyzed by X-ray diffraction, scanning electron microscopy coupled with energy dispersive X-ray spectroscopy, and Mg2Zn11 was detected in the deposit.
研究领域:
冶金学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zhiyao Chu,Junqi Li,Yuan-Pei Lan,Chaoyi Chen,Jian Yang,Deyang Ning,Xuewen Xia,Xisong Mao
A ternary photocatalyst of LaOCl/CeO 2 -g-C 3 N 4 was designed and firstly synthesized by a facile KCl–LiCl molten salt method. The 60 %LaOCl/40 %CeO 2 -g-C 3 N 4 with a 6: 4 weight ratio of LaOCl to CeO 2 has an optimal degradation ratio (nearly 100%) for methylene blue (MB) with an impressive cyclic stability. Both of adsorption and photodegradation contribute to the high MB removal ratio, and kinetic study results show that the rate constant of photocatalytic degradation route is 0.0174 min −1 , which is less than that of adsorption process (2.4406 min −1 ). The excellent adsorption performance of 60 %LaOCl/40 %CeO 2 -g-C 3 N 4 is attributed to its negative zeta potential (−35.40 mV) and larger average pore size. The photochemical characterizations suggest that the 60 %LaOCl/40 %CeO 2 -g-C 3 N 4 form a dual Z-scheme heterojunction , which enhances its separation efficiency of photogenerated e - / h + with an outstanding redox ability, and further promotes the photocatalytic activity.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Refrigeration
·
2018
·
IF 3.233
Qing Cheng,Shun Jiao
The liquid desiccant air-conditioning system conducts air dehumidification with liquid desiccant and is proposed as an alternative to the conventional vapor compression cooling system. The electrodialysis regeneration is suitable for the liquid desiccant, whose most important performance index is the current efficiency. In order to improve theoretical models of the liquid desiccant air-conditioning system based on ED regeneration, the current efficiency correlation of the ED regenerator is acquired based on several experiments and its effect on the system performance is researched in this paper. Current efficiencies of the ED regenerator in the experiment are among 20% and 70%. The increase of the concentration difference between regenerate and dilute desiccants, the operational current and the liquid desiccant concentration at the entrance of regenerate cells of the ED regenerator will all decrease the current efficiency. When the liquid desiccant concentration at the entrance of regenerate cells of the ED regenerator varies from 27% to 35%, the system performance coefficient increases from 4 to 6.2. The increase of the liquid desiccant concentration at the entrance of regenerate cells is harmful to the performance of the ED regenerator but beneficial to the performance of the whole system.
研究领域:
能源工程
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Ying Zhang,Jie Xiong,Chao Chen,Qizheng Li,Jingjing Liu,Zhicheng Zhang
The novel humidity sensor , fabricated from inorganic electrolyte doped porous metal-organic framework composite (denoted as LiCl@UiO-66-NH 2 ), is reported in the present work. The humidity sensing properties of LiCl@UiO-66-NH 2 composites have been investigated. The much higher comprehensive sensing properties of composites are obtained in LiCl@UiO-66-NH 2 with 12.5 wt% LiCl. It shows the excellent linearity (R 2 = 0.994) in a broad relative humidity (RH) range. The impedance modulus of LiCl@UiO-66-NH 2 (12.5 wt%) decreases nearly four orders of magnitude from 33% RH to 95% RH at 100 Hz. Besides, the LiCl@UiO-66-NH 2 (12.5 wt%) humidity sensor exhibits fast response (6s) and recovery (18s) speed and excellent long-term stability. The sensing mechanism was discussed through the investigation of complex impedance curves. These results suggest that LiCl@UiO-66-NH 2 have the potential application in humidity sensing. Our work offers a promising strategy for the fabrication of high performance humidity sensors.
研究领域:
材料科学
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2021
·Vol. 23
·期 3
·1-12
·
IF 2.253
Mao Xisong,Xia Xuewen,Ning Deyang,Li Junqi,Chen Chaoyi,Lan Yuan-Pei
Molten salts synthesis (MSS) is a simple and potential technique for ceria nanoparticles (NPs) production, but the relevant effects of salt medium and cerium precursor on the synthesized ceria NPs need further attention. In the present work, we investigated the influences of frequently employed KCl–LiCl and KOH–NaOH molten flux and typical inorganic cerium precursors on the characterizations and photocatalytic property of ceria NPs. Results show that the CeO 2 NPs obtained in molten KOH–NaOH flux have smaller particle/crystal sizes but more serious agglomeration than that from KCl–LiCl flux. UV–Vis DRS spectra reveal that the ceria synthesized in molten hydroxides from the cerium nitrate precursor has the narrowest band gap of 2.87 eV in studied ceria samples. The ceria NPs obtained from KCl–LiCl flux have wider band gaps of 3.15–3.29 eV and faster recombination rates of photo-generated e − and h + . It was found that the ceria NPs obtained in molten KCl–LiCl salt show better photocatalytic activities for methylene blue (MB) degradation and may be due to the uniform size distribution and well-dispersed particles.
研究领域:
材料科学
·
化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Jia Zhao,Zhaoting Liu,Wenshuo Liang,Guimin Lu
This present work evaluates the local structure and electrochemical behavior of the LiCl-KCl-SmCl 3 melt to facilitate the efficient reprocessing of spent nuclear fuel (SNF). At 723 K, the radial distribution function, coordination number, and structure factors were adopted to understand the local structure of LiCl-KCl and LiCl-KCl-SmCl 3 based on first-principles molecular dynamics (FPMD) simulation. We found the SmCl 3 slight effect on LiCl-KCl melts in short-range order and its influence on the distribution of Li-Li intermediate-range order. Moreover, the diffusion coefficient of Sm(III) 2.012 × 10 -5 cm 2 /s in LiCl-KCl melts was determined by analyzing the mean square displacement. The electrochemical behavior of Sm(III) was conducted in the temperature range from 673 K to 823 K by a series of electrochemical methods. According to the theory of Matsuda and Ayabe, the Sm(III) + e - = Sm(II) is a quasi-reversible process. The diffusion coefficient of Sm(III) was measured by the chronoamperometry method, which verified the credibility of the FPMD simulation. Furthermore, this work explored the exchange current density of Sm(III)/Sm(II), whose value is between 0.826 × 10 -3 and 2.383 × 10 -3 A·cm −2 , by the linear polarization.
研究领域:
材料科学
·
电化学
·
核工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 13
·D606
·
IF 3.12
Kui Liu,Jiajia Sun,Liqi Zhu,Yuxue Sang,Weiqun Shi,Zhifang Chai,Biao Wang,Mingliang Kang
The aim of this work is to explore the electrodeposition of uranium in low-melting LiCl-KCl-CsCl eutectic. A variety of conventional electrochemical techniques, including cyclic voltammetry (CV), chronopotentiometry (CP), and chronoamperometry (CA), were employed to study the electrochemical and kinetic properties of uranium at different temperatures ranging from 573 to 872 K. First, the electrochemical behaviors and diffusion coefficients of uranium species in the melts were investigated and compared to the published results. The temperature significantly affects the cathodic current response of the U4+/U3+ couple within the low temperature range. Moreover, the nucleation mechanisms of uranium in the electrodeposition process were evaluated, and the results indicated that nucleation and growth tend to occur via the same instantaneous mode at all applied temperatures and overpotential ranges. Finally, metallic uranium was deposited by potentiostatic electrolysis at an overpotential of −100 mV vs. U3+/U at different temperatures, and their morphologies and compositions were characterized by SEM-EDS and XRD, respectively. The results show that from 573 to 773 K, uranium deposits evolve form one-dimensional needle-like to multidimensional dendritic structures. No dendrite-free uranium deposits were obtained in the CsCl-containing melts regardless of the temperature.
研究领域:
材料科学
·
电化学
·
核工程
✓ 已验证
DOI
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2022
·
IF 3.555
Benlin Yao,Yiqun Xiao,Yanhong Jia,Sida Wu,Mingshuai Yang,Hui He
The role of oxygen in the electrolytic reduction of uranium oxide in molten salt has received increased attention in recent years. In contrast to solubility, few studies were reported on the kinetic property of oxygen in LiCl. In this work, diffusion behaviors of oxygen anion in the bulk salt and oxide cathode were both studied. A gold working electrode was used to conduct corresponding voltammetry studies in LiCl-rich melt at 923 K. The obtained diffusion coefficient increased when another salt (KCl or LiF) was introduced to LiCl. A model based on ohmic, concentration and electrochemical polarizations was derived and used to describe the electro-deoxidation of uranium oxide in molten salt. By analyzing experimental current-time curves obtained from potentiostatic electrolysis, parameters such as exchange current density, conductivity of porous uranium filled with electrolyte and diffusion coefficient of oxygen anion in porous uranium were calculated. Taken together, the behavior of oxygen in the electro-deoxidation of uranium oxide in LiCl-rich melt can be better understood.
研究领域:
材料科学
·
电化学
·
核工程
✓ 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）