HYDROMETALLURGY
·
2021
·
IF 4.156
Luri Bao,Jingze Zhang,Jie Wu,Guotai Zhang,Yang Yang,Weiping Tang,Mei Xue
Owing to the increasing global demand for lithium, extraction of lithium from salt lake brine water has received considerable attention. In this study, the magnesium doping to produce Li 1.6 Mg x Mn 1.6-x O 4 (LMMO) was designed to overcome the limitation caused by the loss of Mn due to dissolution. The chemical and morphological properties of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The XRD results confirmed that the crystal structure of Li 1.6 Mn 1.6 O 4 was retained after Mg-doping. Scanning electron microscopy and energy-dispersive X-ray spectroscopy showed that LMMO has a flake-shaped structure and the Mg 2+ ions were uniformly distributed in the precursor. The doping of Mg 2+ led to the decrease of Mn 3+ content in the precursor, improving its structural stability. The adsorption capacity of LMMO-6% was 35.6 mg g −1 , which was greater than that of the undoped sample (33.2 mg g −1 ). After the tenth cycle, the dissolution loss of Mn in LMMO-6% was 0.55%, and it is smaller than that for lithium manganese oxide (0.94%). Results confirm that the structural stability was improved compared to undoped adsorbents. Moreover, batch adsorption experiments demonstrated the potential of the HMMO-6% adsorbent to be used for lithium adsorption from real salt lake brine.
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
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Guotai Zhang,Chunxi Hai,Yuan Zhou,Weiping Tang,Jingze Zhang,Jinbo Zeng,Yanhua Liu,Shengde Dong,Guiping Peng
A surge of interest has been attracted by Li 1.6 Mn 1.6 O 4 -type adsorbent for collecting lithium resources from salt-lake brines due to its excellent selectivity, high theorical adsorption capacity up to 72. 3 mg g −1 and low cost. However, its large-scale practical application is limited because of its bone element Mn dissolution during the cycled desorption process. Herein, F and Al co-modifying technique, an efficient method for stabilizing its spinel structure or forming protective coating, was employed to improve the application performances of Li 1.6 Mn 1.6 O 4 -type adsorbent prepared by sol–gel method. Based on the various characterization results, the co-modification not only leads to the formation of fluoride-rich coating and the substitution of Mn 3+ by Al 3+ , but also generates the active adsorbents with abundant nano-islands. DFT calculations revealed that the coating layer is indeed AlF 3 rather than LiF. In addition, in-situ high-temperature XRD tests demonstrates that the co-modification can significantly enhance the heat resistance and structural stability of the material. As-prepared adsorbent exhibits greatly improved Li adsorption capacity (increased from 28.5 to 33.7 mg g −1 ), lower Mn loss rate (decreased from 2.1 to 1.8%), enhanced cycling stability and good adsorption selectivity in the Qarhan brine containing Na + , K + , Ca 2+ , Mg 2+ , which is very significant and important for effectively removing lithium from low-grade brines.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2022
·Vol. 32
·期 8
·3030-3039
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IF 3.518
Yuan Xianggen,Wei Zongwu,Zhang Zhenkun,Liu Haiyan
Coating nanoparticles with metal–organic frameworks (MOFs) can lead to core–shell hybrid particles with synergetic functionalities of the respective components. Previous efforts have been dedicated to achieving homogeneous and smooth MOF coatings with featureless morphologies. Herein, using halloysite nanotubes (HNTs) coated with polydopamine (PDA) to confine nucleation and growth of ZIF-8 on the surface, we prepared rod-like core–shell HNT@PDA@ZIF-8 particles. The ZIF-8 coating has a hierarchical morphology consisting of nanoaggregates of densely packed and fused ZIF-8 nanoparticles. This was achieved by simply controlling the concentration of the MOF precursors. These hybrid MOF particles combine the classical large microporosities with meso- and macroporosities derived from such hierarchical structures, while has enhanced mechanical stability. HNT@PDA@ZIF-8 exhibits appreciated adsorption capacity for several organic contaminants in aqueous system, especially for Rhodamine B.
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
JOURNAL OF POLYMER RESEARCH
·
2021
·Vol. 28
·期 10
·1-9
·
IF 3.097
Lin Changhong,Ying Puyou,Huang Min,Zhang Ping,Yang Tao,Liu Gang,Wang Tianle,Wu Jianbo,Levchenko Vladimir
Due to the outstanding properties comprised of thermal, anti-corrosion and excellent processing properties, the polyurethane coating has received attention from many researchers. However, absence of self-healing capacity limited their applications. In the present work, a self-healing polyurethane (PU) was developed for protective coating via Diels–Alder reaction. Moreover, incorporation of Halloysite nanotubes (HNTs) by in situ polymerization method in the PU enhances the mechanical properties. The macro- and micro-mechanical properties of materials were investigated by tensile and nanoindentation measurement, these results show the composites displayed higher tensile strength (34.2 MPa) and hardness (5.13 MPa) in comparison with pure PU (22.9 MPa and 4.24 MPa). The tensile and POM results indicated that the PU and composites have excellent self-healing property. The simulative salt spray tests indicated the coating possessed an excellent corrosion protection property. Therefore, this work is promising for the self-healing ability protective polymer coating.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Junxiang Zhang,Zeyu Cheng,Xinbo Qin,Xi Gao,Rongping Yun,Xu Xiang
Salt lake brine has become a promising lithium resource, but it remains challenging to separate Li+ ions from the coexisting ions. We designed a membrane electrode having conductive and hydrophilic bifunctionality based on the H2TiO3 ion sieve (HTO). Reduced graphene oxide (RGO) was combined with the ion sieve to improve electrical conductivity, and tannic acid (TA) was polymerized on the surface of ion sieve to enhance hydrophilicity. These bifunctional modification at the microscopic level improved the electrochemical performance of the electrode and facilitated ion migration and adsorption. Poly(vinyl alcohol) (PVA) was used as a binder to further intensify the macroscopic hydrophilicity of the HTO/RGO-TA electrode. Lithium adsorption capacity of the modified electrode in 2 h reached 25.2 mg g–1, more than double that of HTO (12.0 mg g–1). The modified electrode showed excellent selectivity for Na+/Li+ and Mg2+/Li+ separation and good cycling stability. The adsorption mechanism follows ion exchange, which involves H+/Li+ exchange and Li–O bond formation in the [H] layer and [HTi2] layer of HTO.
研究领域:
材料科学
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电化学
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemNanoMat
·
2022
·Vol. 8
·期 10
·e202200324
·
IF 3.82
Hualun Li,Tian Chen,Wei Wang,Guandao Gao,Zhenda Lu
Graphical Developing an effective material to recover lithium from salt-lake brines or used batteries is highly demanded. We report a reduced TiO 2 nanomaterial with numerous lithium vacancies by lithiothermic reaction, exhibiting a high Li-ion adsorption capacity of 26 mg/g from solution. Considering the growing lithium demand and the potential shortage of lithium resource, developing an effective material to recover lithium from salt-lake brines or used batteries is highly needed. Here, we report a reduced TiO 2 nanomaterial (LiTiO 2 ) with numerous lithium vacancies by lithiothermic reaction, which exhibited high adsorption capacity of 26 mg/g from lithium-ion solution.
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
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Qiuyue Wang,Mu Li,Bing Zhao,Boyang Meng,Wutong Chen,Zekai Jiang,Xin He,Bing Li,Xiao-yan Li,Lin Lin
The rapid consumption of lithium ion (Li + ) battery for electronic devices has significantly increased the demand for lithium resource in recent years. The salt-lake brine is considered as the ideal source for Li + extraction, but the co-existing cations, such as Na + and K + limit its recovery efficiency when the adsorption method is applied. In this study, the H 3 LiTi 5 O 12 nanoparticles (HTO) with a spinel structure were synthesized as Li + -selective adsorbent. The static adsorption experiments showed that the Li + absorption capacity of HTO was significantly affected by the pH of bulk solution, and exhibited a high separation factor of Li + /Na + and Li + /K + at 37 and 16, respectively. When HTO was mixed with activated carbon (AC) and coated on the cathode plate, the Li + adsorption kinetics (rate constant) was significantly enhanced from 0.18 to 0.25, due to the accelerated rate of the film diffusion driven by the electric field. Density functional theory (DFT) calculation result showed that applying electricity can strengthen the hydrogen bond between Li and O atom on the HTO (1 1 1) facet. When the AC mixing ratio was increased from 10% to 50%, the Li + desorption efficiency increased from 47% to 90%, but at the expense of sacrificing the adsorption capacity, which decreased from 18.1 mg/g to 9.8 mg/g. In terms of the overall recovery efficiency of Li from brine, the weight ratio of HTO:AC at 9:1 was suggested for the electro-sorption method. Finally, the Li + recovery from actual brine was successfully demonstrated, with 7.1 mg/g of adsorption capacity and well stability.
研究领域:
材料科学
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电化学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 34
·期 47
·475701
·
IF 3.5
Jiayu Ma,Xu Jin,Mengjuan Yang,Ximeng Zhao,Shanshan Ding,Bin Wang,Xiuyan Li
In this research work, a reusable and efficient 2D/1D heterogeneous structured photocatalyst based on amine-functionalized halloysite nanotubes (MHNTs) and Bi2WO6 nanosheet (BWO) was prepared using a facile hydrothermal method for decomposing PPCPs under simulated sunlight. On the degradation of tetracycline hydrochloride (TCH), the effects of composite catalysts prepared under various conditions were discussed. The results showed that over BWO/MHNTs with a mass ratio was 3:1, the synthesizing temperature was 120 °C and the precursor pH value was 1, the TCH (10 mg l−1) degradation efficiency reached 100% after 1 h irradiation of simulated sunlight. Moreover, BWO/MHNTs composites kept good recovery and stable photocatalytic activity after 5 cycles. The excellent dispersion of Bi2WO6 on the surface of clay minerals and the oxygen vacancy enhanced electron–hole separation may be responsible for the its high activity and stability. Futhermore, the radical capture test demonstrated that ·O−2 was primarily responsible for the photodegradation of TCH. Thus, BWO/MHNTs composites exhibit a good application prospect in the field of sunlight-driven photocatalytic degradation towards PPCPs pollutants in water.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2022
·
IF 3.119
Guo-Liang Nie,Rui-Zhi Cui,Wu Li
According to the composition characteristics of lithium, potassium, bromine, and other resources rich in the salt lake brine of the Qinghai–Tibet Plateau, the phase equilibria of the quaternary system LiBr-NaBr-KBr-H2O and its ternary subsystem LiBr-KBr-H2O at 323.15 K are studied by an isothermal dissolution equilibrium method. The solubility of each system in equilibrium solution at the corresponding temperature is measured, and the corresponding phase diagrams are drawn according to the phase equilibrium experimental data. The results show that there is no complex salt or solid solution in the ternary system LiBr-KBr-H2O at 323.15 K. The phase diagram contains one invariant point (E1), two univariate curves (AE1 and BE1), and two equilibrium solid crystallization regions (corresponding to LiBr·H2O and KBr), belonging to the simple cosaturated type. The quaternary system LiBr-NaBr-KBr-H2O also has no formation of complex salt and solid solution. The phase diagram contains two invariant points (F1 and F2), five univariate curves (E1F1, E3F1, F1F2, E2F2, and E4F2), and four equilibrium solid-phase crystallization regions (corresponding to LiBr·H2O, KBr, NaBr·2H2O, and NaBr). At the same time, to further explain the phase equilibrium relationship of each system at different temperatures and the change rule of each component, comparison and discussion are carried out.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2017
·
IF 3.359
Licheng Zhang,Lijuan Li,Dong Shi,Jinfeng Li,Xiaowu Peng,Feng Nie
Innovative application of Synergistic extraction system benzoyltrifluoroacetone(HBTA) and tri-n-octyl phosphine oxide(TOPO) for the extraction of lithium from alkaline brine were investigated. The extraction efficiencies of this extraction system were measured as a function of various extraction parameters, including pH value of aqueous phase, extraction temperature, and composition of organic phase. The extraction complex was determined by slope analysis method, which indicated that HBTA, TOPO and lithium formed a 2:1:1 complex. With this system, separation factor between lithium and sodium could be over 2100 by two stages countercurrent extraction according to McCabe Thiele diagram, and lithium extraction could be 95%. Co-extracted or restrained sodium in organic phase could be fully scrubbed by 0.5 M HCl at O/A = 10:1 and equilibrium pH = 4.68. Lithium reserved in organic phase was stripped completely into aqueous phase using 2.5 M HCl at O/A = 10:1 subsequently. Blank organic after stripping was regenerated by 2 M NaOH at R = 70% for next extraction circle. Stability test of organic phase was conducted with five-stage extraction process containing two stages extraction, single stage scrubbing, stripping and regeneration. Lithium yield reached 95.5% with high purity through the process, neither emulsification nor third phase was found during whole process.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
MINERALS ENGINEERING
·
2025
·
IF 5
Qian Liu,Meitang Liu,Haisheng Hu,Xiaoyu Song,Lu Xiong,Xinyu Li
Lithium is a crucial strategic resource that plays a pivotal and instrumental role in facilitating the advancement of new energy technologies. The rapid growth of the renewable energy industry has resulted in a critical shortage of lithium salt supplies. The extraction of lithium from saline lake brine is characterized by its low energy consumption and cost-effectiveness, making it a prominent area of research in the field. However, the development and widespread application of lithium extraction technology under natural settings have tremendous relevance for lithium extraction in this region because of the severe natural environment and limited industrial base in the majority of saline lake areas. In this paper, zinc oxide with piezoelectric properties was prepared using hydrothermal method, and it was combined with lithium iron phosphate through sintering method to create a piezoelectric adsorbent capable of responding to mechanical energy. The adsorbent can capture wave energy in the saline lake and generate polarized electrons to accelerate theredox process, resulting in selective lithium ion adsorption. After 48 h of reaction with a 20 % zinc oxide loading and a sintering temperature of 200℃, the capacity of the piezoelectric adsorbents for lithium increased to 35.27 mg/g, as shown by experimental results. This study proposes a novel method for extracting lithium directly from saline lake brines under natural conditions, as well as a new application of piezoelectric materials.
研究领域:
材料科学
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能源技术
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Separations
·
2022
·Vol. 9
·期 7
·180
·
IF 3.344
Lei Ma,Qiuyan Bi,Yuanhui Tang,Chao Zhang,Fuju Qi,Hao Zhang,Yifan Gao,Shiai Xu
In order to recover lithium from brine with a high Mg2+/Li+ratio, a positively charged nanofiltration (NF) membrane was prepared by depositing polydopamine (PDA)-coated graphitic carbon nitride (g-C3N4) as the interlayer (PDA-g-C3N4) and the interfacial polymerization (IP) of polyethyleneimine (PEI) and trimesoyl chloride (TMC) was carried out. Under optimal conditions, the water contact angle of the composite membrane is only 55.5° and the isoelectric point (IEP) is 6.01. The final positively charged NF membrane (M5) exhibits high permeance (10.19 L·m−2·h−1·bar−1) and high rejection of Mg2+(98.20%) but low rejection of Li+(13.33%). The separation factor (SF) is up to 48.08, and the Mg2+/Li+ratio of the permeate is 0.036 in the simulated brine. In conclusion, the M5 membrane shows a good separation performance for salt lake brine (SF = 12.79 and Mg2+/Li+ratio of the permeate = 1.43) and good fouling resistance. Therefore, the positively charged M5 membrane with PDA-g-C3N4as the interlayer has the potential to be used for the recovery of lithium from brine.Keywords:polydopamine;graphitic carbon nitride;nanofiltration membrane;brine;Mg2+/Li+separation
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
危险品化学品经营许可证（带存储）