SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Mingqiang Cheng,Juanjian Ru,Qibo Zhang,Yixin Hua,Cunying Xu,Jian Yang,Zhipeng Zhou,Libing Tang,Wenyi Xia,Jialun Leng,Ding Wang
As the most widely consumed type of batteries, zinc-manganese batteries (ZMBs) pose significant environmental risks due to the migration of hazardous components through ecological chains. Addressing this issue aligns with the urban mining paradigm, which seeks to unlock resource potential for green, low-carbon societies. Here, we propose a precipitant-free strategy for the selective recovery of Mn and Zn from spent ZMBs utilizing a recyclable choline chloride-oxalic acid dihydrate deep eutectic solvent (ChCl-OAD DES). The designed DES achieves high leaching efficiency of the battery powders, with leaching efficiencies of 99.57 % for Mn and 99.85 % for Zn within just 10 min at 80 ℃. A unique coordination mechanism enables the selective recovery of Mn and Zn successively without additional chemical additives. Specifically, 97.5 % of Mn is recovered as MnC 2 O 4 ·2H 2 O with a purity of 99.7 % after the leachate is left to stand at 25 ℃ for 12 h. Subsequently, Zn 2+ combines with C 2 O 4 2- to form ZnC 2 O 4 ·2H 2 O by adjusting the water content, achieving a recovery efficiency of 99.2 % and a purity of 98.9 %. Importantly, the ChCl-OAD DES maintains its structural integrity and performance across three regeneration cycles through the evaporation of water and replenishment of oxalic acid dihydrate. This closed-loop methodology establishes a sustainable hydrometallurgical paradigm, offering dual advantages in preventing secondary pollution and maximizing resource efficiency in battery recycling technologies.
研究领域:
环境科学
·
材料工程
·
冶金学
·
绿色化学
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废弃物管理
·
可持续技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Houhan Fang,Yang Jin,Jun Li,Jiandong Wang,Yiping Wang,Jie Deng,Wen Wang
Flow-electrode capacitive deionization (FCDI) is a promising desalination technology recognized for its high salt removal capacity. However, conventional FCDI systems face structural limitations under elevated flow conditions, where phenomena such as hydraulic short-circuiting and leakage significantly compromise performance and operational stability. To overcome these limitations, this study introduces an advanced FCDI system featuring a mirror-symmetric serpentine design in both the flow channel and gasket. This precisely symmetrical and tightly compressed structure provides internal rigid support, specifically designed to minimize membrane module and flow channel deformation while withstanding high hydraulic pressures and ensuring operational stability. At an optimal flow rate of 200 mL min −1 (SCC mode, 1.2 V), the system achieved a charge efficiency (CE) of 127.92 % and an average salt removal rate (ASRR) of 3.24 μmol cm −2 min −1 . Coupled computational fluid dynamics (CFD) simulations of the flow and electric fields, combined with adsorption process analysis, identified flow-enhanced ion transport at the membrane interface as a key factor contributing to the high charge efficiency. Further optimization yielded an ASRR of 6.14 μmol cm −2 min −1 and a CE of 115.48 % at 2.0 V, demonstrating superior desalination rates and energy efficiency. Long-term stability tests validated the system’s durability and leakage-free performance under sustained operation. These findings highlight the feasibility and scalability of this optimized FCDI system as a high-performance solution for large-scale desalination applications.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Jingling Li,Zheng Liang,Qiucheng Su,Hu Jin,Kelai Wang,Gang Xu,Xueqing Xu
For an organic–inorganic hybrid quantum dot light-emitting diode (QD-LED), enhancing hole injection into the emitter for charge balance is a priority to achieve efficient device performance. Aiming at this, we employ N,N′-bis(3-methylphenyl)-N,N′-bis(phenyl)benzidine (TPD) as the additional hole transport material which was mixed with poly(9-vinylcarbazole) (PVK) to form a composite hole transport layer (HTL) or was employed to construct a TPD/PVK bilayer structure. Enabled by this TPD modification, the green QD-LED (at a wavelength of 515 nm) exhibits a subband gap turn-on voltage of 2.3 V and a highest luminance up to 56 157 cd/m2. Meanwhile, such TPD modification is also beneficial to acquire efficient blue and red QD-LEDs. In particular, the external quantum efficiencies (EQEs) for these optimized full-color QD-LEDs are 8.62, 9.22, and 13.40%, which are 3–4 times higher than those of their pure PVK-based counterparts. Revealed by the electrochemical impedance spectroscopy, the improved electroluminescent efficiency is ascribable to the reductions of recombination resistance and charge-transfer resistance. The prepared QD-LEDs surpass the EQE values achieved in previous reports, considering devices with small-molecule-modified HTLs. This work offers a general but simple and very effective approach to realize the low turn-on-voltage, bright, and efficient full-color QD-LEDs via this solution-processable HTL modification.
研究领域:
材料科学
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光电技术
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半导体器件
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光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 13
·8079-8090
·
IF 4.22
Liu Jiali,Yang Qiang,Liu Jikai,Luo He’an
Tungsten trioxide (WO 3 ) has been conceived as a promising photoanode material for photoelectrochemical (PEC) water oxidation. Therefore, many efforts have been made to improve its PEC performances. Herein, a novel heterojunction is fabricated through combining rocksalt CoO (R-CoO) or blende CoO (B-CoO) nanosheets with WO 3 nanoplates using a spin-coating method. The typical type II heterojunctions, e.g., WO 3 /R-CoO and WO 3 /B-CoO, both have exhibited higher photocurrent densities than pristine WO 3 photoanode. The photocurrent densities of WO 3 /R-CoO, WO 3 /B-CoO and WO 3 are 0.53 mA cm −2 , 0.45 mA cm −2 and 0.31 mA cm −2 at 1.23 V vs. reversible hydrogen electrode, respectively. For the WO 3 /R-CoO photoanode, the surface charge separation efficiency is 50.95% and the photoconversion efficiency is 0.062%, which are both higher than the WO 3 and WO 3 /B-CoO photoanodes. The enhanced PEC performances are due to the type II heterojunction between WO 3 and R-CoO (or B-CoO), which facilitates the absorption of visible light and charge transport. The better performance of WO 3 /R-CoO than that of WO 3 /B-CoO may be due to the deeper valence band position of R-CoO. Our work demonstrates that R-CoO (or B-CoO) can couple with WO 3 to form a type II heterojunction to improve the PEC water oxidation performance.
研究领域:
材料科学
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光电化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Science
·
2020
·Vol. 8
·期 8
·2129-2142
·
IF 6.183
Xiaoshuang Guo,Zihan Yuan,Yang Xu,Minyan Wei,Zhiwei Fang,Wei-En Yuan
Hemangioma, one of the most common angiogenic diseases in infants and children, is characterized by the abnormal and aggressive proliferation of vascular endothelial cells. Advanced therapeutic strategies like RNA interference can inhibit the expression of target proteins at the translational level, but they are rarely used in hemangioma treatment owing to the lack of safe carriers. In this study, we showed for the first time that RNAi technology targeting HIF-1α (hypoxia-inducible factor-1 alpha) could benefit hemangioma therapy effectively. Heptafluorobutyric anhydride (HFAA) was used to modify low-molecular-weight PEI (PEI1.8k), and a novel fluorinated polycation carrier named fluorinated PEI (FPEI) was synthesized. Furthermore, HIF-1α-shRNA-pDNA was condensed by FPEI to fabricate FPEI polyplexes. Compared with PEI25k polyplexes, which are usually the gold standard used in gene delivery, FPEI polyplexes showed lower cytotoxicity and higher serum stability, transfection efficiency and gene silencing efficiency both in vitro and in vivo. In addition, we confirmed that FPEI polyplexes could efficiently inhibit the formation of new capillaries and tumor growth in vivo, which may provide a practicable strategy for clinical hemangioma treatment in the future.
研究领域:
药理学
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分子生物学
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生物医学工程
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治疗学
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产品关联
DOI
PubMed
高影响因子
Nature Photonics
·
2021
·Vol. 15
·期 5
·379-385
·
IF 38.771
Liu Mingming,Wan Qun,Wang Huamiao,Carulli Francesco,Sun Xiaochuan,Zheng Weilin,Kong Long,Zhang Qi,Zhang Congyang,Zhang Qinggang,Brovelli Sergio,Li Liang
The thermal quenching of light emission is a critical bottleneck that hampers the real-world application of lead halide perovskite nanocrystals in both electroluminescent and down-conversion light-emitting diodes. Here, we report CsPbBr 3 perovskite nanocrystals with a temperature-independent emission efficiency of near unity and constant decay kinetics up to a temperature of 373 K. This unprecedented regime is obtained by a fluoride post-synthesis treatment that produces fluorine-rich surfaces with a wider energy gap than the inner nanocrystal core, yielding suppressed carrier trapping, improved thermal stability and efficient charge injection. Light-emitting diodes incorporating these fluoride-treated perovskite nanocrystals show a low turn-on voltage and spectrally pure green electroluminescence with an external quantum efficiency as high as 19.3% at 350 cd m −2 . Importantly, nearly 80% of the room-temperature external quantum efficiency is preserved at 343 K, in contrast to the dramatic drop commonly observed for standard CsPbBr 3 perovskite nanocrystal light-emitting diodes. These results provide a promising pathway for high-performance, practical light-emitting diodes based on perovskite nanostructures.
研究领域:
材料科学
·
纳米技术
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2019
·
IF 7.723
Yi Li,Shan Yu,Dmitry E. Doronkin,Shiqian Wei,Meng Dan,Fan Wu,Liqun Ye,Jan-Dierk Grunwaldt,Ying Zhou
As an important byproduct during natural gas exploitation, green utilization of hydrogen sulfide (H 2 S) by photocatalysis has offered us the possibility for production of clean hydrogen (H 2 ) from H 2 S with low energy consumption. In this work, we have successfully introduced well-dispersed palladium sulfide (PdS) which is preferably loaded on In 2 S 3 of MnS/In 2 S 3 composite for improved photocatalytic hydrogen evolution from H 2 S aqueous solution. In contrast to binary MnS/In 2 S 3 , ternary MnS/In 2 S 3 /PdS has exhibited a remarkable and stable hydrogen production rate of 22.7 mmol g −1 h −1 with an apparent quantum yield of 34% at around 395 nm. A comprehensive structure characterization of the ternary composite including scanning transmission electron microscopy (STEM) and X-ray absorption spectroscopy (XAS) in combination with theoretical calculations confirm the good dispersion of PdS in the composite. Moreover, we discovered that PdS preferably interact with In 2 S 3 rather than MnS in the composite through Pd-S-In bond on the interface of the two. Photoluminescence (PL) spectra, surface photovoltage (SPV) spectra together with transient photocurrent and electrochemical impedance spectra (EIS) demonstrate the advantage of PdS for promoting the charge separation. This work sheds light on the positive effect on the enhanced activity of the corresponding system resulting from the preferable anchoring of highly dispersed PdS on In 2 S 3 in the composite by chemical Pd-S-In bond. Not only the high dispersion but also the preferable anchoring of the co-catalyst in the composite could hence inspire people for more rational designs of ternary composite in future.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2017
·Vol. 96
·期 1
·27-32
·
IF 1.356
Haiqian Zhao,Xingcun Gao,Chenghao Liu,Zhonghua Wang,Hanbing Qi
Basic rules of NO oxidation by a Fe 2+ /H 2 O 2 /AA directional decomposition system were researched based on the technical background of flue gas NO x removal. Effects of gas-liquid interfacial area, main gas, and solution parameters on NO oxidation efficiency ( η ) were analyzed. The results showed that adequate contact area was the precondition for high η by a Fe 2+ /H 2 O 2 /AA system. η decreased with the increase in NO concentration, which illustrated that this method would be efficient in oxidizing NO at a low concentration. η tended to decrease linearly with the growth in gas flow, however, the NO oxidation rate ( v ) rose with the increase in NO concentration and gas flow. η increased with the initial concentrations of H 2 O 2 and Fe 2+ , but the amplitude decreased. Controlling the initial concentrations of H 2 O 2 and Fe 2+ to achieve reasonable synergies between generation rate and consumption rate of ·OH could weaken the invalid consumption of reactants. η increased with the increase in temperature in the range 30–60 °C, but it nearly did not change with temperature after 60 °C. This oxidation technology and the traditional wet flue gas desulphurization technology exhibited temperature synergy. Under typical pH of wet desulphurization, η and H 2 O 2 consumption rate did not change obviously.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Qiyu Meng,Jiemiao Yu,Liangrong Yang,Yanqing Li,Mo Xian,Huizhou Liu
Effective isolation of 1,2,4-butanetriol (BT) from the fermentation broth with low BT concentration was achieved based on anionic reactive extraction with a combined extractant consisted of boronic acid carrier and trioctylmetylammonium Aliquat® 336 (A336) dissolved in the organic phase. The influence of various diluents, pH values, the ratio of phenylboronic acid derivatives (PBAD) to BT (α PBAD/BT ), and A336 to BT (β A336/BT ) on extraction property was investigated in detail. For model BT solutions, satisfactory extraction efficiency of 92% was obtained under the conditions of α PBAD/BT = 1.5, β A336/BT = 2, with dichloromethane as a diluent. Aqueous hydrochloric acid solutions were employed to strip BT from the organic phase. For actual fermentation broth, the extraction and stripping efficiency under the optimum conditions were 74% and 69%, respectively. Besides, compared with the original fermentation broth, 1,2,4-butanetriol has been concentrated by 4.6 times with the reactive extraction coupled hydrolysis.
研究领域:
化学工程
·
生物技术
·
有机化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Jiang Cheng,Zhen Zhang,Minghao Zhao,Youwei Guan,Xihao Chen,Xiang Meng,Hua Tang,Lu Li,Shenghao Wang
CdS films prepared via chemical bath deposition exhibit extremely good performance as a buffer layer of chalcogenide solar cells. However, their commercial application is very limited because of the production of a large amount of wastewater containing cadmium. In this study, we develop an efficient way to prepare CdS films using the spin-coating technique. The spin solution is anhydrous, and the oxygen content can be well controlled by changing the Cd/S content ratio in the solution. The crystal structure, morphology, and optical and electrical properties of CdS films with different Cd/S content ratios are characterized. The effect of the oxygen content on the device performance is investigated. We find that the introduction of an appropriate amount of oxygen can improve the carrier transport efficiency by decreasing the interface recombination. The spin-coated CdS films have good coverage of the substrate for film thicknesses below 50 nm. By the optimizing of Cd/S content ratio, we achieve an improved efficiency of 5.76% for the Sb 2 Se 3 solar cells. This preparation technique is sufficiently simple for large-scale processing and produces much less wastewater containing cadmium; thus, it is promising for application to future large-scale solar cell production.
研究领域:
材料科学
·
太阳能
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Li Luo,Zhen Fan,Zhaobin Zhang,Danyang Liu,Guofa Li,Lishuang Wang,Bingsuo Zou
SnO2 nanoparticles (NPs) have been used as an electron transport layer (ETL) in quantum dot light-emitting diodes (QLEDs) to achieve stable and high-performance devices. However, SnO2 NPs with high electron mobility cause the problem of imbalanced charge injection and transport in QLEDs. Meanwhile, the SnO2 NPs synthesized at low temperature have hydroxyl (−OH) groups, which could damage the performance of QLEDs. Here, Zn doping was applied to modulate the properties of SnO2 NPs and achieve better carrier balance in green CdSe/ZnS QLED. The maximum current efficiency (CE) of QLED with 5 wt % Zn-doped SnO2 NPs is 2.3-fold higher than that of SnO2-based QLED. In addition, a small-molecule 4,4′-bis(carbazole-9-yl)-1,1′-biphenyl (CBP)-mixed poly(9-vinylcarbazole) (PVK) layer was used as a hole transport layer to facilitate the hole injection and charge balance. As a result, a maximum external quantum efficiency (EQE) of 5.03% is obtained for the best performance device. The T50 lifetime at a luminance of 100 cd/m2, for a device based on 5 wt % Zn-doped SnO2 ETL, is 9141 h, which is 2.29-fold longer than the reference one. This work provides a new strategy to obtain high-performance and stable display arrays.
研究领域:
材料科学
·
光电子学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nature Catalysis
·
2020
·Vol. 3
·期 11
·932-940
·
IF 30.471
Xiao Yequan,Feng Chao,Fu Jie,Wang Faze,Li Changli,Kunzelmann Viktoria F.,Jiang Chang-Ming,Nakabayashi Mamiko,Shibata Naoya,Sharp Ian D.,Domen Kazunari,Li Yanbo
Ta 3 N 5 is a promising photoanode material with a theoretical maximum solar conversion efficiency of 15.9% for photoelectrochemical water splitting. However, the highest applied bias photon-to-current efficiency achieved so far is only 2.72%. To bridge the efficiency gap, effective carrier management strategies for Ta 3 N 5 photoanodes should be developed. Here, we propose to use gradient Mg doping for band structure engineering and defect control of Ta 3 N 5 . The gradient Mg doping profile in Ta 3 N 5 induces a gradient of the band edge energetics, which greatly enhances the charge separation efficiency. Furthermore, defect-related recombination is significantly suppressed due to the passivation effect of Mg dopants on deep-level defects and, more importantly, the matching of the gradient Mg doping profile with the distribution of defects within Ta 3 N 5 . As a result, a photoanode based on the gradient Mg-doped Ta 3 N 5 delivers a low onset potential of 0.4 V versus that of a reversible hydrogen electrode and a high applied bias photon-to-current efficiency of 3.25 ± 0.05%.
研究领域:
材料科学
·
光电化学
·
半导体物理
✓ 已验证
DOI
高影响因子
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