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
·
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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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
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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产品关联
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 10
·2373
·
IF 3.2
Jing Zhu,Xiyun Yang,Yongqiang Huang,Rongzheng Yao
With the depletion of solid lithium ore, extracting lithium from salt lake brine has become a critical focus for future endeavors. A four-step method was used to synthesize high-purity H1.6Mn1.6O4for extracting Li+. Porous cubic Mn2O3was hydrothermally synthesized with carbon spheres and surfactants as templates. Then, it was converted to LiMnO2by calcining with Li2CO3. After roasting and acid pickling, H1.6Mn1.6O4was successfully synthesized. The impacts of calcination temperature, Li/Mn molar ratio and glucose addition on LiMnO2composition, loss percentage of dissolved Mn in precursor, and the adsorption characteristics of the lithium ion sieve were studied. Glucose inhibited the formation of LiMn2O4and promoted the formation of pure LiMnO2. The resulting precursor without impurities showed porous structure. After acid pickling, H1.6Mn1.6O4showed a high-adsorption performance and excellent cycle performance. After five cycles, adsorption capacity remained above 30 mg/g, and the loss percentage of dissolved Mn stabilized at about 1%. The Li+–H+exchange conformed to pseudo-second-order adsorption dynamics and the Langmuir adsorption isotherm equation, indicating that the adsorption process can be classified as monolayer chemical adsorption.
研究领域:
材料科学
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化学工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
Plant Phenomics
·
2022
·
IF 6.961
Yongni Shao,Di Zhu,Yutian Wang,Zhi Zhu,Wenchao Tang,Zhengan Tian,Yan Peng,Yiming Zhu
Moxa wool is a traditional Chinese herbal medicine, which can warm channels to dispel coldness. At present, there is no unified index to evaluate the purity and growing years of moxa wool in the market. Terpineol is one of the effective substances in the volatile oil of moxa wool. Here, we characterize the purity and growing years of moxa wool by studying terpineol. Gas chromatography-mass spectrometry (GC-MS) and high-performance liquid chromatography (HPLC) are the methods for monitoring terpineol at present, all of which have defects of complicated procedures. We established linear fitting to distinguish the different purities of moxa wool through the intensities (areas) of terpineol, the characteristic peaks, and the consequence presented; the coefficient of determination (R2) was higher than 0.90. Furthermore, based on the characteristic peak position of standard terpineol, the correlation model with the purity and growing year of moxa wool was set up, thereby differentiating the quality of moxa wool. We have built the partial least squares (PLS) model of the growing years of moxa wool with high accuracy, and the determination coefficient is greater than 0.98. In addition, we compare the quantitative accuracy of Raman spectroscopy with terahertz technology. Finally, a new method of terahertz spectroscopy to evaluate quality of moxa wool was found. It provides a new idea for the identification of inferior moxa wool in the market and a new method for identifying the quality of moxa wool in traditional Chinese medicine.
研究领域:
中药学
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光谱分析
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生物医学工程
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DOI
高影响因子
MATERIALS SCIENCE FORUM
·
2020
·
IF 0
Fei Fei Li,Xue Song Jiang,Jing Wei Li,Bo Yuan Ban,Jian Chen
The one of major impurities in quartz is iron, which has a great impact on the properties of the material and should be be strictly removed in many applications. In this study, a low-energy consumption, simple, fast processing is introduced by combination microwave treatment with different acid leaching. Selective heating of microwaves is used to process quartz, causing local phase changes to improve the purification effect. Acid leaching was used to remove the iron in the quartz matrix. Under optimized conditions, the iron content can be reduced to below 0.167 ppmw with one single purification pass.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 6
·4232-4241
·
IF 3.5
Xiaoxin Chen,Hailan Qin,Hongtian Li,Yuxiao Du,Shenghao Wang,Peifeng Li,Yongming Hu,Laijun Liu,Jianwei Zhao,Dawei Wang
In many studies, the properties of BiFeO 3 –BaTiO 3 (BF–BT) ceramics vary greatly using different raw reagents, which makes it challenging to obtain reliable and repeatable properties of BF–BT-based devices. In this work, 0.7BiFeO 3 –0.3BaTiO 3 (0.7BF–0.3BT) ceramics were fabricated by a conventional solid-phase synthesis using TiO 2 reagents with varied purities of 98%, 99%, 99.9%, and 99.99%, respectively. The phase structure, microstructure, ferroelectric, and piezoelectric properties were comprehensively studied. All compositions of the ceramics exhibit a pseudo-cubic phase perovskite structure, and the fraction of the rhombohedral phase increases with increasing the TiO 2 purity. Additionally, backscattered electron images and energy-dispersive spectroscopy revealed an obvious core–shell structure within grains. In particular, the 0.7BF–0.3BT ceramics prepared with 98% purity TiO 2 exhibited superior ferroelectric and piezoelectric properties, d 33 ∼ 220 pC/N and d 33 ∗ $d_{{\mathrm{33}}}^{\;*}$ ∼ 230 pm/V. The ceramics prepared with higher purity TiO 2 suffered from severe leakage conduction, which can be well addressed by adding excess TiO 2 . Our work reveals the importance of different grades of purity TiO 2 on the electrical properties of BF–BT ceramics.
研究领域:
材料科学
·
物理学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Keke Guan,Wen Lei,Honghong Wang,Xuefeng Liu,Jin Luo,Jianghao liu,Quanli Jia,Haijun Zhang,Shaowei Zhang
In this work, Ti 3 AlC 2 powders with high purity were prepared by microwave-assisted molten salt method (MA-MS). The synthesis parameters (such as raw materials ratio, heating temperature and reactant materials) and the formation mechanisms were systematically investigated. The results indicate that Ti 3 AlC 2 powders with a high purity up to 98.5% are prepared using TiH 2 /Al/1.8TiC mixture as reactant materials, and NaCl–KCl as molten salt by microwave-assisted heating at 1050 °C for 30 min. Compared with traditional heating methods, both the synthesis temperature and holding time of highly pure Ti 3 AlC 2 powders synthesized in this work are much milder. This high-efficiency synthesis approach could be ascribed to the synergistic effect of molten salt and microwave heating. Moreover, the TiH 2 –Al–TiC starting material is more suitable for the rapid synthesis of Ti 3 AlC 2 powders with high purity via present microwave-assisted molten salt method than that TiH 2 –Al–C.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Tiefeng Wang,Xu Li,Jinxiang Dong
Ethylene glycol (EG), synthesized from coal-based syngas, is frequently contaminated with refractory impurities 1,2-butanediol (BDO) and 1,2-propanediol (PDO), which affect the quality of EG for polyester production. Distillation, one of the existing methods employed, is still difficult for separation and purification due to the close boiling points. Melt crystallization is an effective technology to obtain high-purity organic compounds based on the difference in the melting points of each component in the mixture. Thus, in this work, we have explored the feasibility of the static melt crystallization on the separation of these two binary systems, EG/BDO and EG/PDO, respectively. For this purpose, a jacketed crystallization tube was adopted and the process was divided into three stages: seed generation, crystallization, and sweating. The crystallization parameters were investigated and fractal porous media theory was used to describe the state of the crude crystals. Furthermore, sweating was applied as a finishing treatment. The purity of ethylene glycol was recorded using gas chromatography, and its corresponding UV transmittance spectrum was studied. The results showed that the purity of ethylene glycol could reach ≥99.8% from the two binary systems studied and its UV transmittance at 220 nm was significantly improved by the tertiary separation process. Overall, melt crystallization has been proved as an effective way to solve the difficulty of separating these short-chain glycols.
研究领域:
化学工程
·
材料科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
S.H.E.N. Ya-Qiang,L.I. Dong-Yun,X.U. Yang,G.E. Hong-Liang,X.U. Qiang,Y.A.N.G. Hui
High purity ultrafine alumina powders with different crystalline phases and morphologies were prepared by solid-phase sintering method. The influence mechanism of halides on the particle characteristics of alumina powders was studied. The results showed that NH 4 F additives induced the conversion of metastable alumina to α-alumina at high temperature, lowered the phase transformation temperature of α-alumina by about 300 °C, increased the α-alumina conversion rate by about 11.6%, reduced the sodium oxide content by about 72.3 wt%, and caused the alumina crystals to grow in a platelet shape manner. By comparison, NH 4 Cl additives had less effect on the transition temperature of α-alumina and the impurity content, and the particle morphology of alumina was a mixture of vermicular and platelet shapes. This study revealed the influence mechanism of two kinds of halides on the phase conversion, morphology evolution, and sodium removal of alumina powders from sintering mechanism and the theories of crystal structure, adsorption on the solid surface, and electronegativity of atoms.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2021
·
IF 9.642
Jing Li,Zhaomeng Liu,Chengqi Feng,Xiaoying Liu,Fangyu Qin,Chen Liang,Huiyang Bian,Chengrong Qin,Shuangquan Yao
The premise of high value utilization of lignocellulosic biomass is effective separation of hemicellulose. In this paper, the extraction of bamboo hemicellulose using freeze-thaw assisted alkali treatment (FAT) was studied. The effect of alkali concentration, alkali treatment time, freezing temperature, and freeze-thaw time on the main components was studied. Bamboo was frozen at −30 °C for 12 h, thawed at room temperature, and then treated at 75 °C for 90 min with 7.0% alkali. The extraction rate of hemicellulose was as high as 64.71%. The purity of hemicellulose samples using conventional AT decreased from 82.63% to 78.56%. Hemicellulose with the same yield as that of conventional alkali treatment was obtained by further reducing the alkali concentration. The purity of hemicellulose samples increased from 82.63% to 89.45%. It had a higher purity, higher molecular weight, and lower polydispersity. A new, green and efficient alkaline extraction method for hemicellulose was developed.
研究领域:
生物化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Dan Wang,Yuanmin Gong,Meiting Yan,Jiaqi Chen,Xueping Tao,Yang Zhou,Yan Ma,Li Rao,Panpan Chen,Qifeng Fu
Carbon dots (CDs) hold great potential for chromatographic separations. However, their application in chromatographic stationary phases has been limited by two major synthetic challenges: (1) insufficient control over surface chemoselectivity caused by impurity co-adsorption, and (2) structural heterogeneity arising from uncontrolled solvothermal byproducts. To address these limitations, we developed a self-polymerization-driven strategy to synthesize high-purity hydrophobic CDs from 8-amino-2-naphthol (8N2OH) and 2,3-dihydroxynaphthalene (DHN). These CDs were incorporated into organic polymer monoliths via in situ copolymerization, yielding novel 8N2OH-CDs and DHN-CDs hybrid monolithic stationary phases for reversed-phase capillary liquid chromatography. The synthesized CDs were thoroughly characterized, with high purity confirmed by proton nuclear magnetic resonance. The resulting monolithic columns exhibited high permeability and uniformity, as demonstrated by field emission scanning electron microscopy, attributed to the excellent dispersion of the CDs. The chromatographic performance was evaluated using nine types of neutral, alkaline, and acidic compounds, as well as Tanaka standard test mixtures. Compared to unmodified columns, the CD-modified monoliths showed significantly enhanced retention strength and selectivity, supported by Tanaka tests revealing multifactorial retention mechanisms. This work demonstrates the potential of high-purity hydrophobic CDs as versatile modifiers for high-performance chromatographic stationary phases.
研究领域:
分析化学
·
材料科学
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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）