ACS Sustainable Chemistry & Engineering
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2024
·
IF 7.1
Yujiang Sun,Xin Zhang,Shijie Xu,Shunjin Yang,Xinyu Wang,Xiaorou Cao,Xiao Sun,Yuzhe Zhang,Dehang Ren,Xiaohu Hu,Haoyu Yang,Qiaran Zhang,Zongjing Lu,Xuejing Zhang,Yongan Yang
Lithium sulfide (Li2S) is a critical material for two systems of next-generation advanced lithium batteries. However, its practical applications are seriously impeded by its expensive price due to its troublesome storage and problematic production. Herein we report the synthesis of Li2S by thermally reducing lithium sulfate with hydrogen. Compared with the industrial approach of carbothermal reduction, this new method using a gaseous reductant is advantageous because of emitting zero amount of carbon oxides, having no solid byproducts or precursor residuals, generating only one environmentally benign and recyclable byproduct of water, and not requiring postsynthesis purification. Those features make this method cost-effective and easy for material storage. Moreover, the actual synthesis involves many parasitic reactions, which surprisingly do not cause real troubles for producing high-purity Li2S. Furthermore, compared with the commercial Li2S, the as-synthesized Li2S demonstrates superior performance when used as the cathode material in lithium–sulfur batteries and as the precursor to make sulfide solid electrolyte Li6PS5Cl for all-solid-state lithium batteries. Therefore, this green method enables paving the way for practical sustainable applications of Li2S.
研究领域:
材料科学
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能源化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Xiaoqi Liu,Yanyun Zhang,Yan Liu,Ting’an Zhang
This paper aims to synthesis a recyclable adsorbent from solid waste using a clean and environmentally friendly method to deal with Cr(VI) water pollution. Magnetic zeolite/chitosan composites (ZFA/MCS) were prepared by the neutralization method. The adsorption properties of ZFA/MCS, prepared by the neutralization method for Cr(VI) ions under different conditions especially cross-linking, were investigated in detail. The results showed that cross-linked ZFA/MCS generally showed higher adsorption capacity than uncross-linked ones. The uncross-linked ZFA/MCS and cross-linked ZFA/MCS showed a saturated adsorption capacity of 25.67 mg·g −1 and 28.47 mg·g −1 at pH = 3 and 30 °C, respectively. The experimental values were followed Langmuir adsorption equations and pseudo-second-order kinetic model, indicating that the adsorption was probably monolayer coverage and chemical adsorption, respectively. The effect of temperature proved that the adsorption was spontaneous and endothermic. Therefore, the adsorbent with excellent recyclability and adsorbability was successfully fabricated via a green synthetic strategy.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER COMPOSITES
·
2022
·Vol. 43
·期 12
·8761-8770
·
IF 3.531
Yanhong Ji,Peng Miao,Ruonan Zhang,Quan Li,Yifan Zha,Fengying Dai,Xi Du,Benqiao He,Shaoyun Fu
Low silver contents are desirable for electrically conductive adhesives (ECAs) due to the high cost of silver. In the present work, micro-sized flower-like silver particles (MFSPs) with long and thin petals are prepared by a novel, green, and facile chemical reduction method in an aqueous solution. The effects of reactant mass ratio and reactant concentration are investigated to control the morphology and size of MFSPs. Three kinds of MFSPs with different sizes are filled into an epoxy resin to prepare novel ECA. Due to the easily formed conductive paths by such morphological silver particles, the as-prepared MFSP/epoxy composite adhesive has a low percolation threshold, a high conductivity, and high adhesion strength at a very low silver content. When considering the optimal combination of low electrical resistance and high adhesion strength, the MFSP obtained at the 1.5:1 ratio of ascorbic acid to silver nitrate is promising for preparing the ECA with a low Ag content of 30 wt% which is the lowest content for ECAs compared with the literature. The synthesis process of MFSPs has the advantages of mild condition, simple process, and environmental friendship. This study provides a new way to prepare highly conductive Ag/epoxy adhesives with low silver contents.
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
·
2024
·
IF 8.3
Yongqi Zhu,Yifan Yang,Shuang Wu,Yiwen Zhu,Xinyue Li,Qinan Mao,Yifan Chen,Rui Shi,Jiasong Zhong,Jing Wang
Near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) are considered promising light sources for night vision, food analysis, biomedicine, and plant growth. Yet, the application potential of this technology is vulnerable to the function degradation of the phosphors used, such as thermal quenching, which needs to be addressed urgently. Herein, the NIR phosphors K2LiMF6:Cr3+ (M = Al, Ga, In) with a cubic double-perovskite structure synthesized by a green hydrofluoric acid-free hydrothermal method exhibit outstanding thermal stability. Under 450 nm excitation, the as-synthesized K2LiMF6:Cr3+ phosphors all exhibited broadband NIR emission covering 650–1000 nm peaking at 755–780 nm. The prepared K2LiAlF6:Cr3+ phosphor shows a unique zero-thermal quenching performance (I423 K/I298 K = 102%). The comprehensive effects of a wide band gap, large thermal energy barrier, weak electron–phonon coupling effect, and high structural rigidity are responsible for the suppression of thermal quenching in this material. The output power of the NIR pc-LED device reached 285 mW at 100 mA. This series of phosphors has promise in night vision and bioimaging applications.
研究领域:
材料科学
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光学
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生物医学工程
✓ 已验证
DOI
高影响因子
NANO
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2017
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IF 1.025
Dehui Li,Weichen Qi,Jinglei Xiao,Jing Yang,Yong Wu,Qiao Gao,Shengyong Zhai
The facile and ecofriendly method for the synthesis of a suitable colloidal nanocrystal ink plays an important role in the field of solar cells. Here, we describe our recent efforts toward this direction by a simple one-pot colloidal method to engineer CuInSe 2 (CISe) nanocrystals with cubic zincblende (ZB) structure. The suitable band gap value and obvious photoresponse of the as-synthesized CISe nanocrystals indicate their potential application in the field of thin film solar cells. In addition, a possible crystal growth mechanism has been suggested for the formation of ZB CISe.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
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2024
·Vol. 26
·期 12
·7231-7245
·
IF 9.3
Yutao Yang,Rongzheng Tian,Hongzhou Zhang,Zhenyu Wang,Lianqi Zhang,Yongan Yang,Dawei Song
Lithium sulfide (Li2S) is the critical raw material used for the synthesis of sulfide solid-state electrolytes, but its high cost and pollution restrict the commercialization of sulfide solid-state electrolytes and sulfide-based all-solid-state batteries. A new green and cost-effective method for the synthesis of high-quality Li2S is designed and proposed in this work. The method of reducing Li2SO4 with H2 circumvents the disadvantages of many side reactions, complicated purification processes, impure products and emission of greenhouse gases (CO and CO2) associated with traditional carbothermal reduction methods, and high-purity Li2S (H-Li2S) is obtained. Subsequently, H-Li5.6PS4.6Cl1.4 solid electrolyte was synthesized and compared with the C-Li5.6PS4.6Cl1.4 electrolyte synthesized from commercial Li2S (C-Li2S). The ionic conductivity (8.06 mS cm−1) and chemical/electrochemical stability as cathode/anode material were better than those of C-Li5.6PS4.6Cl1.4. Besides, the rate performance and long cycling stability of an all-solid-state lithium battery NCM//Li5.6PS4.6Cl1.4//Li–In assembled with H-Li5.6PS4.6Cl1.4 are better than those of batteries assembled with C-Li5.6PS4.6Cl1.4. It can maintain a discharge capacity of 133.23 mA h g−1 after 300 cycles at 1C (95% of the initial discharge capacity), and has a high discharge capacity of 127.9 mA h g−1 at 3C. The high electrochemical performance of the all-solid-state battery confirms the superiority of high-purity H-Li2S and the advantages of the hydrogen reduction method.
研究领域:
材料科学
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电化学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Li Gao,Tenghong Kong,Yanqing Ye,Peng Ren,Qiang Zhou,Huaijun Tang,Zhengliang Wang
Red-emitting Mn 4+ -doped fluoride phosphors are recognized as promising materials for high-performance warm white light-emitting diodes (WLEDs). However, the extensive use of toxic hydrofluoric acid in traditional synthesis methods hinders their development and commercialization. Furthermore, the traditional solid-phase method often has cumbersome sintering steps, high temperature, long holding time, and certain safety hazards, so it is very necessary to develop a green synthesis method with simple steps and low energy consumption. In this study, a low-temperature solid-state method is proposed to synthesize Rb A SiF 6 :Mn 4+ ( A = K, Cs) phosphors by one step. Optimal emission intensities were observed at Mn 4+ concentrations of 1.2 % in RbKSiF 6 and 2.1 % in RbCsSiF 6 . These phosphors demonstrated high thermal stability. At 423 K, the photoluminescence intensities of RbKSiF 6 :1.2 %Mn 4+ and RbCsSiF 6 :2.1 %Mn 4+ reached 114 % and 87 % of their respective values at room temperature. Meanwhile, the chromaticity shifts were almost negligible, and high color purity was achieved for both phosphors. The electro-optical performance of WLED devices utilizing these phosphors, in combination with YAG:Ce 3+ and GaN chips, showed high color rendering indices (CRI) and low correlated color temperatures (CCT) across varying currents. Specifically, under a driving current of 20 mA, the device incorporating RbKSiF 6 :1.2 %Mn 4+ exhibited a CRI of 94 and a CCT of 3732 K, with a luminous efficacy of 61 lm/W. These findings highlight the potential of green-synthesized RASFM phosphors in advancing the application of warm WLEDs.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Xing Yu,Junjie Li,Tielin Shi,Chaoliang Cheng,Guanglan Liao,Jinhu Fan,Tianxiang Li,Zirong Tang
In this article, uniform and anti-oxidative Cu-Ag core-shell nanoparticles with average particle diameter of 50 nm and Ag/Cu atomic ratio of 1/10 were synthesized by an environmental-friendly method. The morphology and core-shell structure of the obtained nanoparticles were observed through scanning electron microscope, transmission electron microscopy , energy-dispersive spectroscopy, and x-ray diffraction. Conductive inks were prepared by mixing the synthesized nanoparticles with the mixture of ethylene glycol and ethanol. The structure evolution and electrical resistivity of the Cu-Ag core-shell nanoparticle deposits were investigated upon heating up to 350 °C in comparison with pure Cu nanoparticles with similar sizes. A sintering mechanism was proposed to understand the sintering behavior of the Cu-Ag core-shell nanoparticles. It showed that dewetting of Ag shell through surface diffusion could effectively improve sintering performance at lower temperature besides its protection of Cu core from oxidation up to 156.3 °C.
研究领域:
材料科学
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纳米技术
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 10
·3555-3560
·
IF 7.367
Zonghua Pu,Ibrahim Saana Amiinu,Chengtian Zhang,Min Wang,Zongkui Kou,Shichun Mu
Applications of highly-efficient and durable non-precious metal electrocatalysts for hydrogen evolution reaction (HER) have great potential to relieve the energy crisis. Here, we demonstrate a green method for fabrication of a number of transition metal phosphides (TMPs) by pyrolyzing melamine and self-assembled phytic acid (PA) cross-linked metal complexes. The obtained materials consisting of TMP nanoparticles (NPs) are encapsulated in N,P-codoped carbon (NPC). Among TMPs, the resultant FeP NPs encapsulated in the NPC matrix (FeP NPs@NPC) show the highest HER activity at all pH values. At a current density of 10 mA cm−2, FeP NPs@NPC displays overpotentials of 130, 386 and 214 mV in 0.5 M H2SO4, 1.0 M phosphate buffer solution (PBS) and 1.0 M KOH, respectively. Additionally, the encapsulation by NPC effectively prevents FeP NPs from corrosion, exhibiting almost unfading catalytic activity after 10 h testing in acidic, neutral and basic electrolytes. More importantly, other TMPs wrapped in NPC (CoP NPs@NPC and Ni2P NPs@NPC) can be easily obtained by this method, which also exhibit relatively high activity toward HER. Therefore, this generic synthesis strategy opens a door for unprecedented design and fabrication of novel low-cost TMP based electrocatalysts for HER and other electrochemical applications.
研究领域:
材料科学
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电化学
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能源科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 37
·47957
·
IF 2.188
Jingtao Dai,Zhijun Wu,Liuyang Tang,Jinqing Qu
Cyclic carbonates reacted with diamines or polyamines have been proposed as a greener and safer method to prepare free isocyanate polyurethane coatings. Here, five kinds of bis(cyclic carbonate)s (TDC: toluene bis(cyclic carbonate), MDC: 4,4′-diphenylmethane bis(cyclic carbonate), IPDC: isophorone bis(cyclic carbonate), HMDC: 4,4′-methylenebis(cyclohexyl cyclic carbonate), HDC: hexamethylene bis(cyclic carbonate)) were prepared by reacting glycerol carbonate with diisocyanate under atmospheric pressure. Their structures were verified by 1 H-NMR and 13 C-NMR. These difunctional cyclic carbonates were then reacted with several amines to prepare new polyhydroxyurethane (PHU) coatings, and the film properties were tested. It was found that PHUs based on aromatic and alicyclic structures including TDC, MDC, IPDC, and HMDC displayed high hardness but had poor flexibility and impact resistance, whereas PHUs based on aliphatic structures such as HDC exhibited good flexibility and impact resistance and low hardness. When the length of the alkyl groups in the amine curing agents increased, the impact resistance and flexibility of the PHUs increased, but their pencil hardness decreased. PHUs from TDC, MDC, and IPDC had excellent chemical resistance, but the PHUs from HMDC and HDC had less chemical resistance. Some films displayed excellent properties including 4H pencil hardness, 100 cm kg impact resistance, and excellent flexibility. Some PHUs exhibited good thermal stability, with T 5% values all above 242°C. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47957.
研究领域:
材料科学
·
有机化学
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2019
·Vol. 21
·期 24
·6746-6753
·
IF 9.405
Yancui Xu,Taotao Li,Weiwei Xu,Chaowei Li,Songfeng E,Liangjie Wang,Xiaoyang Long,Yu Bai,Lai Xu,Yagang Yao
Hexagonal boron nitride nanosheets (h-BNNSs) have attracted intensive attention due to their excellent physicochemical properties and potential industrial applications. Numerous studies have been explored for the mass production of h-BNNSs. However, their high energy cost and low efficiency remain huge challenges. Here we demonstrate a recyclable, scalable and green method for h-BNNS production with a high efficiency up to 88.4%. In this strategy, B2O3, the most common but rarely used boron compound, was utilized as a boron precursor and nitrided at relatively low temperatures. In this process, NaCl crystals served as recyclable and sacrificial templates so that hollow-structured h-BNNSs were obtained. DFT calculations revealed that NaCl facilitates the adsorption of B2O3 and benefits the formation of h-BNNSs. The NaCl template could be recycled via a simple rinsing and re-precipitation process. Moreover, we demonstrate the thermal application of the as-synthesized h-BNNSs in PVA-based composite materials, which exhibit high in-plane thermal conductivity up to 8.35 W mK−1 with 15.85 wt% filling while reducing the coefficients of thermal expansion.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTEGRATED FERROELECTRICS
·
2021
·
IF 0.836
Ailing Yang,Zhikuang Dai
A green method was used to synthesize Cu2O@BSA nanoparticles (NPs). The influential factors on the morphologies of NPs were investigated. The result showed that the alkalinity of reactant solution plays an important role. Fourier transform infrared (FTIR) spectroscopy indicated that Cu2+ interacts strongly with O positioned at peptide chain and N in amide of BSA. The formation mechanism of Cu2O@BSA NPs depends on the unfolding of the peptide of BSA proceeds the electrostatic interaction between Cu2+ and BSA. The experimental results are of importance for fabrication of semiconductor NPs by using BSA or other protein as coating agents.
研究领域:
材料科学
·
生物化学
✓ 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）