Nature Sustainability
·
2020
·Vol. 3
·期 5
·386-390
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IF 12.08
Lang Jialiang,Jin Yang,Liu Kai,Long Yuanzheng,Zhang Haitian,Qi Longhao,Wu Hui,Cui Yi
Lithium (Li) is an important resource for the sustainability of socioeconomic systems given its wide use in various industrial applications. The industrial production of Li metals relies on the electrolysis of a mixture consisting of high-purity lithium chloride (LiCl) and potassium chloride. However, the purification of LiCl is expensive and unsustainable, requiring a substantial amount of energy and the use of noxious chemical reagents, so that producing high-purity Li efficiently and sustainably is a challenge. Herein we report a new method of producing high-purity electrolytic Li from low-purity LiCl using solid-state electrolyte. Taking advantage of the high Li-ion selectivity of the solid electrolyte, we directly obtained high-purity metallic Li through the electrolysis of low-purity LiCl. Our new method provides two important advantages over conventional methods: (1) the cost of producing high-purity Li is reduced by using low-purity LiCl from low-grade brine, and the simpler purification process reduces the use of energy and chemical reagents; and (2) the operating temperature of the electrolytic process decreases from 400 °C to 240 °C, leading to an additional reduction in energy use.
研究领域:
材料科学
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能源工程
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DOI
高影响因子
JOURNAL OF LABELLED COMPOUNDS & RADIOPHARMACEUTICALS
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2025
·Vol. 68
·期 3
·e4140
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IF 0.9
Fuhai Wu,Xiaoming Wang,Huan Chen,Xu Zhou,Hailong Zhao,Mengchao Cui
[ 18 F]Florbetazine injection, a radiotracer that could target Aβ plaques and achieve diagnosis of Alzheimer's disease ( AD ), is a novel positron emission tomography (PET) imaging agent currently in the investigational new drug (IND) application stage. The active ingredient of [ 18 F]Florbetazine injection, [ 18 F]Florbetazine, is a diaryl-azine derivative. Chemical and radiochemical purity is critical quality attributes (CQAs) for [ 18 F]Florbetazine injection, and thus, we have developed and validated a relevant HPLC method. This study describes the specificity, linearity, accuracy, repeatability, and limit of quantification (LOQ) of the HPLC method. The stability of three sample batches was investigated using the established method. The validation results demonstrated the accuracy, precision, and sensitivity of the method, making it suitable for implementation as part of the quality control (QC) process for [ 18 F]Florbetazine injection. The stability of three sample batches revealed a decrease in concentration and radiochemical purity over 10 h. However, all samples maintained a radiochemical purity of over 90% after 10 h. The results provided a foundation for establishing quality standards for [ 18 F]Florbetazine injection. The same methodology employed in this study could be applied and modified for QC protocols of other 18 F-labeled radiopharmaceuticals.
研究领域:
医学
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药学
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核医学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Junmiao Yu,Xiaoxia Yang,Changkai Wang,Mingxia Huang,Butera Hassan,Zhihong Yang,Xizhu Yang,Bin Huang,Xuejun Pan
This paper integrated alkai-dried sewage sludge (SS) using calcium oxide (CaO) and bagasse (BA) with a two-stage sorption-enhanced steam gasification (SESG) process to separately generate high-purity H 2 and CO at different temperature regions, while exploring optimal conditions and coupling mechanism. Response surface experiment revealed that SS and BA exerted opposing effects on H 2 and CO production, highlighting the importance of balancing their mass ratio. Increasing CaO dosage and H 2 and CO-generation stages temperatures enhanced H 2 and CO production. The optimal conditions were identified as a CaO dosage of 1.2, with temperatures of 600 °C and 750 °C for H 2 and CO-generation stages, considering cost and energy efficiency. With the optimal CaO and BA dosage, the moisture of SS reduced from 80 % to below 40 % within 3h, enabling low-energy dewatering. During H 2 -generation stage (600 °C), residual moisture and Ca(OH) 2 in the dried SS generated in-situ steam promoting steam reforming reactions, and Ca(OH) 2 has more CO 2 sorption capacity than CaO and catalytic effect of cyclization and dehydrogenation of generated tar, to boost H 2 production. During CO-generation stage (750 °C), CaCO 3 released CO 2 to gasify char, improving CO production. The process produced 113.5 mL/g dry biomass of H 2 with 74.1 vol% purity during H 2 -generation stage and 113.3 mL/g dry biomass of CO with 59.8 vol% purity during CO-generation stage. This paper proposed a new approach for drying and resource utilization of SS for inherently separated generation of high-purity H 2 and CO, providing a more sustainable and resource-efficient process.
研究领域:
能源工程
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环境工程
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化学工程
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高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2013
·Vol. 28
·期 5
·882-887
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IF 0.484
Li Liang,Zhou Aiguo,Xu Lin,Li Zhengyang,Wang Libo
Titanium aluminum carbide (Ti 3 AlC 2 and Ti 2 AlC) powders were synthesized from TiH 2 powders instead of Ti powders as Ti source by a tube furnace under argon atmosphere without preliminary dehydrogenation. 95 wt% pure Ti 3 AlC 2 powders were synthesized from TiH 2 /1.1Al/2TiC at 1 450 °C for 120 min. High-purity Ti 2 AlC powders were also prepared from 3TiH 2 /1.5Al/C and 2TiH 2 /1.5Al/TiC powders at 1 400 °C for 120 min. The as-synthesized samples were porous and easy to be ground into powders. Sn or Si additives in starting materials increased the purity of synthesized Ti 3 AlC 2 obviously and expanded the temperature range for the synthesis of Ti 3 AlC 2 . With Si or Sn as additives, high pure Ti 3 AlC 2 was synthesized at 1 200 °C for 60 min from TiH 2 / x Si/Al/2TiC and TiH 2 / x Sn/Al/2TiC ( x = 0.1, 0.2), respectively.
研究领域:
材料科学
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无机化学
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DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2025
·
IF 3.8
Wu Huaxin,Huang Ting,Zhang Wei,Yao Huan,Li Xueyao,Su Ping,Yang Yi
In the biomedical and chemical fields, purity assessment of compounds is a critical step in ensuring product quality and safety. In this study, a method for purity quantification was proposed as two-signal suppression–internal standard correction–high-performance liquid chromatography–quantitative nuclear magnetic resonance (TSS-ISC-HPLC-qNMR). The two-signal suppression effectively suppresses the interference of solvent signals in the NMR spectra, and the internal standard correction eliminates the influence of many variables during sample preparation and analysis. The purity result (99.89%) of the quantification of certified reference material of acesulfame (AF) by this method matched with the certified value (99.88%), which verified the accuracy of the method. The purity result (with standard deviation) of 94.42% ± 0.10% for the quantification of the low-purity drug digitoxin by the method matched with the purity result of 94.42% ± 0.11% by qNMR with deconvolution (as a validated method), which proved that the method could be used for the quantification of low-purity compounds. The methodology achieved a substantial reduction in total analysis time, from 28 to 4 h (considering only the routine analysis time after optimization), in contrast to the ISC-HPLC-qNMR approach. Additionally, it effectively decreased bias to undetectable with a standard deviation of 0.10%, while the bias of the TSS-HPLC-qNMR method was 0.93%. The present method ensures the accuracy of the quantitative results while demonstrating a low economic burden and significant time efficiency, which shows great potential for application in the accurate quantitative analysis of low-purity organic compounds. Graphical
研究领域:
分析化学
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药物分析
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生物医学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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2023
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IF 3.6
YongKwan Lee,HyunChul Kim,Namhun Kwon,JaeJin Sim,MiHye Lee,SoongJu Oh,SeokJun Seo,JaeHong Shin,Kyoungtae Park
The Hunter process is predominantly used to manufacture high-purity Ta powder. Among the various physical properties of the Ta powder, its impurity content is particularly crucial. In this study, the process temperature at which a liquid pool of raw material and diluent can be formed and the corresponding amount of diluent were analyzed by performing thermodynamic simulations using FactSage and HSC Chemistry software. Based on the results of the thermodynamic simulations, Ta powder was prepared at process temperatures of 700–800 °C and a specific amount of NaCl at each temperature. Thereafter, the prepared Ta powder was recovered and a post-treatment process was performed to ensure purity. The characteristics of the recovered Ta powder were evaluated according to each process condition by oxygen/nitrogen/hydrogen analysis, scanning electron microscopy/energy-dispersive X-ray spectroscopy, glow discharge-mass spectrometry, and X-ray diffractometry. The synthesized Ta powders were confirmed to exhibit purities >99.95% and oxygen, nitrogen, and hydrogen concentrations of 447, 21, and 10 ppm, respectively. The characterization results indicated that the produced Ta powders were fabricated entirely in a single phase with high purity and recovery rates. Finally, process optimization was achieved for manufacturing high-purity (≥3 N5) Ta powder with controllable impurities.
研究领域:
材料科学
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冶金学
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2023
·
IF 3.8
Chunkai Wang,Ruirui Cui,Jun Zhang,Chaoyong Deng
In this study, a Ba 3 MgTa 2 O 9 : x Sm 3+ orange-red phosphor was synthesized by a high-temperature solid-phase reaction method, and its fluorescence properties were analyzed. The Ba 3 MgTa 2 O 9 : x Sm 3+ phosphor exhibited three emission peaks at 561 nm ( 4 G 5/2 → 6 H 5/2 ), 595 nm ( 4 G 5/2 → 6 H 7/2 ), and 642 nm ( 4 G 5/2 → 6 H 9/2 ) under the excitation of 407 nm. The Ba 3 MgTa 2 O 9 :0.05Sm 3+ phosphor had good thermal stability and excellent color stability at different temperatures. Ba 3 MgTa 2 O 9 :0.05Sm 3+ phosphor is the best doping concentration phosphor, with a high color purity of 98.52 %. The XRD of the Sm 3+ ion-doped phosphor showed that its crystal structure and morphology were stable, and the doping of Sm 3+ ions did not affect its crystal structure significantly. Therefore, the Sm 3+ ion-doped phosphors in this study have potential applications and are expected to be used in the field of WLED.
研究领域:
材料科学
·
光学
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DOI
高影响因子
ELECTROCHEMISTRY
·
2024
·Vol. 92
·期 4
·043015-043015
·
IF 2.7
Yuxiang ZHONG,Yuanjia MA,Yangzhou HE,Xiao YANG
The authors focus on the development of a molten salt processing technology for extracting white phosphorus (P4) from sewage sludge ash, which is recognized as a potential secondary P source due to its composition of various metal phosphates. This work offers insights into the interaction between solid AlPO4 and molten CaCl2. The results show that solid AlPO4 exhibits favorable solubility in molten CaCl2, although at a slower rate compared to solid Ca3(PO4)2 due to the presence of stable Al–O bonds. The study also demonstrates the feasibility of extracting high-purity P4 from the molten mixture through electrolysis. The purity of the obtained electrolyzed P4 from AlPO4 is comparable to the commercially available high-purity-grade product. These findings underscore the potential of sewage sludge ash containing AlPO4 as a viable source for extracting high-purity P4. This research contributes to the advancement of sustainable P utilization technologies from secondary sources.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Yuhui Chen,Zhenhua Hao,Rulong Ma,Pei Wang,Yongchun Shu,Jilin He
In this study, a new unmixed carbon reduction method was proposed for the preparation of pure W powder. The effects of reduction temperature, reduction time, carbon distance and thickness of WO 3 layer on the phase of the reduction products were investigated. Results show that pure tungsten powder with a carbon content of less than 150 ppm can be prepared at 950 °C with a WO 3 layer thickness of 5 mm and a carbon distance of 2 mm. Increased carbon distance and thickness of WO 3 layer will lead to a decrease in the reduction ratio. Additionally, particle size of the tungsten powder gradually increases from 1 μm to 8 μm due to sintering with the extended reduction time. Furthermore, a two-stage carbon reduction process with WO 2 as an intermediate product is proposed, which avoids the sintering and growth of tungsten powder particles and the particle size of tungsten powder was successfully reduced to 2 μm. This unmixed carbon reduction reduces the carbon concentration and prevents the carbonization of tungsten powder. The experiment verifies the feasibility of carbon as a reducing agent in producing pure tungsten powder by reducing WO 3 .
研究领域:
材料科学
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冶金学
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DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Xiao Ge,Baole Li,Xiang Meng,Tiansheng He,Tianchi Li,Qi Yang,Zheng Wei,Taihong Yan,Zhongwei Yuan
In recent years, acetohydroxamic acid (AHA) has gained significant attention as a novel organic salt-free reagent in the reprocessing of the spent nuclear fuel. However, the primary byproduct of the AHA in the process, acetic acid (HAC), is difficult to destroy during the heating. It tends to evaporate along with nitric acid, which can contaminate the recovered nitric acid and affect its reuse. This study utilizes a multi-stage electrodialysis process to separate nitric acid from acetic acid, exploiting differences in their ionization degrees and ion migration speeds under an external electric field. The effects of current, type of reflux solution, reflux flow rate, and the number of reflux stages on the purity and recovery of nitric acid were examined. Results indicated that under the same reflux condition, increasing the current, raising the reflux flow rate or the concentration of solution could enhance the recovery rate of nitric acid. The purity of nitric acid products could reach 99.88 % at the two-stage reflux using nitric acid as a reflux solution. And a high recovery rate on the nitric acid of 97.48 % also could achieve, which meets the criteria for nitric acid reuse in the reprocessing of the spent nuclear fuel.
研究领域:
化学工程
·
核燃料再处理
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产品关联
DOI
高影响因子
Materials
·
2020
·Vol. 13
·期 23
·5356
·
IF 3.057
Weihua Chen,Jiancheng Tang,Xinghao Lin,Yunlong Ai,Nan Ye
In the present study, high-purity ternary-phase nitride (Ti2AlN) powders were synthesized through microwave sintering using TiH2, Al, and TiN powders as raw materials. X-ray diffraction (XRD), differential scanning calorimetry (DSC), transmission electron microscopy (TEM), and scanning electron microscopy (SEM) were adopted to characterize the as-prepared powders. It was found that the Ti2AlN powder prepared by the microwave sintering of the 1TiH2/1.15Al/1TiN mixture at 1250 °C for 30 min manifested great purity (96.68%) with uniform grain size distribution. The formation mechanism of Ti2AlN occurred in four stages. The solid-phase reaction of Ti/Al and Ti/TiN took place below the melting point of aluminum and formed Ti2Al and TiN0.5phases, which were the main intermediates in Ti2AlN formation. Therefore, the present work puts forward a favorable method for the preparation of high-purity Ti2AlN powders.Keywords:MAX-phase Ti2AlN;microwave;synthesis;high-purity powder
研究领域:
材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2016
·
IF 3.299
H. Xiao,Z. Yao,Q. Peng,F. Ni,Y. Sun,C.X. Zhang,Z.X. Zhong
Separation of squalene, a type of terpenoid hydrocarbons with important biological properties, from camellia oil by silver ion complexation was studied. We showed that the UV–visible absorption wavelength of squalene in AgNO 3 -methanol solution was obviously red-shifted, and the infra-red vibration wavelength of C C bond slightly decreased, indicating that complexation between squalene and Ag + took place. The distributions of squalene in AgNO 3 methanol solution/petroleum ether under different conditions were further investigated. We found that the fraction of squalene in AgNO 3 -methanol phase was enhanced with increased percentage of methanol and AgNO 3 concentration and decreased extraction temperature. The distribution coefficient of squalene was up to 7.87 under optimum extraction conditions with 70% methanol (v/v), 0.6 mol/L AgNO 3 , reaction time of 12 h, and at the temperature of 0 °C. Furthermore, under the optimum conditions, extraction of squalene from the unsaponifiable portion of camellia oil exhibited high selectivity with a raffinate rate and a back-extraction rate of 73.9% and 72.5%, respectively. The purity of extracted squalene was 37.8%, 108 times more concentrated than that in the starting material.
研究领域:
生物化学
·
分离技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）