WASTE MANAGEMENT
·
2023
·
IF 8.1
Yu Zhang,Meng Yu,Jiangmin Guo,Shaojun Liu,Hao Song,Weihong Wu,Chenghang Zheng,Xiang Gao
The pretreatment of cathode material before leaching is crucial in the spent lithium-ion battery hydro-metallurgical recycling. Here research demonstrates that in-situ reduction pretreatment could dramatically improve the leaching efficiencies for valuable metals from cathodes. Specifically, calcination under 600 °C without oxygen using alkali treated cathode can induce in-situ reduction and collapse of oxygen framework, which is ascribed to the carbon inherently contained in the sample and promote the following efficient leaching without external reductants. The leaching efficiencies of Li, Mn, Co and Ni can remarkably reach 100%, 98.13%, 97.27% and 97.37% respectively. Characterization methods, such as XRD, XPS and SEM-EDS, were employed and revealed that during in-situ reduction, high valence metals such as Ni 3+ , Co 3+ , Mn 4+ can be effectively reduced to lower valence states, conducive to subsequent leaching reactions. Moreover, leaching processes of Ni, Co and Mn fit well with the film diffusion control model, and the reaction barrier is in accordance with the order of Ni, Co and Mn. In comparison, it is observed that Li was leached with higher efficiency regardless of the various pretreatments. Lastly, an integral recovery process has been proposed and economic assessment demonstrates that in-situ reduction pretreatment increases the benefit with a negligible cost increase.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Cunku Wang,Jie Ding,Zhixiong Huang,Yingluo Zhuang,Yan Li,Minxian Shi,Yan Qin
In this work, two ceramizable phenolic adhesives were prepared using ZrSi 2 particles or ZrSi 2 /B 4 C mix particles as the inorganic fillers. The thermal stability, bonding strength , microstructure and phase composition of the adhesives were investigated by TGA , shear strength of Al 2 O 3 joints, SEM, EDS , XRD and XPS . The results show that these two adhesives have different bonding performances and ceramicization evolutions above 600 °C in air due to the addition of the second phase particles B 4 C. The bonding strength of ZrSi 2 /B 4 C modified phenolic adhesive after treatment at 1200 ℃ can be as high as 36.6 MPa, while the bonding strength of ZrSi 2 modified phenolic adhesive under the same conditions is only 17.5 MPa. B 4 C undergoes oxidation reaction before ZrSi 2 , and the oxidation product B 2 O 3 liquid phase not only reacts with ZrSi 2 to form oxidation-resistant ZrB 2 , but also can dissolve the high temperatures defects of the adhesive and chemically bond with the Al 2 O 3 substrates at the interface.
研究领域:
材料科学
·
胶粘技术
·
热工程
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2018
·
IF 3.956
Qilei Yang,Ang Cao,Na Kang,Kang An,Zhao-Tie Liu,Yuan Liu
The catalyst for direct ethanol synthesis (DES) from syngas was investigated in this work, which is Co/La 2 O 3 -doped La 4 Ga 2 O 9 . The catalyst was prepared by using LaCo 1−x Ga x O 3 with perovskite phase as the precursor to intensify the interaction in the elements of Co, La and Ga. The catalysts were characterized by using XRD , H 2 -TPR, TEM , EDS, XPS , BET, ICP and TG techniques. This catalyst showed high selectivity to ethanol and excellent stability including excellent resistance to sintering and carbon deposition . It seems that the ethanol is generated in the interface between metallic Co and La 4 Ga 2 O 9 , and in the interface cobalt would be positively charged due to the interaction between Co nanoparticles and La 4 Ga 2 O 9 . The results and the related discussions indicate that Co/La 2 O 3 -doped La 4 Ga 2 O 9 catalyst is a promising catalyst for DES from syngas. Graphical abstracts.
研究领域:
催化
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qianqian Chen,Xiaobing Yang,Xingping Fu,Junjie Pan,Junmei Zhou,Gengwu Zhou,Kejun Cheng
Currently, antibiotics are extensively utilized in the pharmaceutical industry to assist humans and animals in combating various infectious diseases. The extensive use of various antibiotics enhances the quality of life. However, it can also have negative effects on the environment and human health, including water pollution and the rise of antibiotic-resistant microorganisms. To date, antibiotics have been detected in rivers, groundwater, and even drinking water. There is an urgent need to design and develop advanced materials for the remediation of antibiotics present in our environment. In this paper, we successfully synthesized a novel Ag 2 S-ZnS/ZIF-8 hollow heterojunction via facile sulphuration and solvothermal methods. This heterojunction was employed as a catalyst for the degradation of tetracycline (TC) in water under UV and visible light irradiation. The physicochemical properties of the as-synthesized catalysts were thoroughly analyzed using XRD, EDS, SEM, BET, XPS, TEM, ESR, UV–vis techniques. The results demonstrate that Ag 2 S-ZnS/ZIF-8 displays enhanced photocatalytic activity for TC degradation no matter under visible or UV light irradiation. After 10 min of UV light irradiation, its photocatalytic degradation efficiency was achieved 92.74 %. Additionally, Ag 2 S-ZnS/ZIF-8 was able to degrade 92.14 % of TC (visible light, with 35 min). The corresponding kinetic rate constant of Ag 2 S-ZnS/ZIF-8 is 0.145 min −1 (UV light) and 0.043 min −1 (visible light), respectively. Furthermore, Ag 2 S-ZnS/ZIF-8 also shown excellent stability for the degradation of TC in the presence of visible light. This is a result of its high specific surface area, superior photocurrent and efficient separation of photo-generated electrons-hole pairs. Apart from this, the photocatalytic degradation mechanism of TC over Ag 2 S-ZnS/ZIF-8 is discussed in detail.
研究领域:
环境科学
·
材料科学
·
化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Aijuan Xie,Jiawen Du,Feng Tao,Yuwei Tao,Zhichen Xiong,Shiping Luo,Xiazhang Li,Chao Yao
A novel three-dimensional graphene surface-mounted nickel-based metal organic framework (3D Gr/Ni-MOF) electrocatalyst was fabricated via freeze-drying technique and ultrasonic assisted method. The morphology, elemental composition , crystal structure, functional group structure, specific surface area and pore size of the composite were analyzed by SEM, EDS, XRD, FTIR, and BET. A series of conditional experiments from the aspects of organic ligand screening, ultrasonic time, molar ratio of metal salt to ligand, and porous graphene loading were carried out to optimize 3D Gr/Ni-MOF composite. Oxygen Evolution Reaction (OER) catalytic performance, OER process kinetics, stability and the deeper causes of enhanced OER performances of 3D Gr/Ni-MOF were also investigated via a group of electrochemical methods. The experiment results showed that 3D Gr/Ni-MOF composite prepared with 2,5-pyridinedicarboxylic acid as ligand, 1:1 M ratio of nickel acetate to ligand, 10 mg of 3D Gr loading and 8 h of ultrasonic process exhibited the most excellent OER activity. Its overpotential of 370 mV was much smaller than rGO/Ni-MOF, Ni-MOF and 3D Gr prepared under the same conditions, and as non-precious metal catalyst , it has the traits of low cost, easy preparation, high activity and durable stability.
研究领域:
材料科学
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电化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 32
·21882-21889
·
IF 3.9
ManLu Wang,JiaCheng Wu,LiYing Hao,Qiang Wei
Herein, a facile method is proposed for the bulk synthesis of conductive non-metallic carbon nanospheres with controllable morphology to replace conventional metal calibration reference materials (CRMs), such as gold nanoparticles and copper grids. The prepared nanospheres had an average diameter of ∼222 ± 23 nm, where silicon dioxide formed the core and the shell was comprised of the carbon layer. The structure of the conductive carbon nanospheres was characterized using FTIR, SEM, EDS and TEM. Additionally, an innovative design was demonstrated by 3D printing the calibration carrier device. Furthermore, the stability and image linear distortion of the conductive carbon nanospheres were verified using analysis of variance (ANOVA). The results demonstrated that the accelerating voltage, magnification, and various positions in the X/Y axes had no significant effect on measured diameter of nanospheres, which was evident from all the p values being greater than 0.05. The comprehensive set of results reveal that conductive carbon nanospheres have great potential to replace traditional CRMs.
研究领域:
材料科学
·
纳米技术
·
显微镜技术
·
3D打印
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Coatings Technology and Research
·
2025
·
IF 2.8
Zhang Linbo,Hong Mu-Nai Jin,Yang Ruoyu,Jiang Xianyu,Zhou Yusheng,Zhang Tongqing,Yuan Le
This study develops and explores a self-stratifying coating system that incorporates both epoxy and acrylic resins. It examines the impact of film thickness and substrate type on self-stratification behavior, confirms predictions from the surface energy model, and identifies the surface tension gradient as the primary driving mechanism for stratification. Additionally, this research investigates the influence of FeSiCr powder on the stratification behavior of the coating. Results demonstrate that the self-stratifying coating, composed of a blend of epoxy and acrylic resins with FeSiCr powder, exhibits superior corrosion resistance compared to coatings formulated solely from a mixture of epoxy resin and FeSiCr powder. SEM-EDS analysis reveals that the enhanced corrosion resistance can be attributed to the accumulation of epoxy resin and FeSiCr at the bottom of the coating, while the acrylic resin forms an effective protective layer on the surface. Furthermore, the study examines the effects of FeSiCr powder content, solvent addition, and volatilization rate on the stratified structure and appearance of the coating. The findings indicate that at relatively low FeSiCr powder content, the layered structure of the coating remains largely intact, with the powder predominantly residing within the epoxy resin layer. However, increasing the powder content compromises the self-stratification structure, leading to a rougher coating surface. It is also observed that augmenting the quantity of the xylene/butyl acetate mixture reduces pit formation on the surface, while the use of MIBK solvent results in incomplete stratification and exacerbates surface roughness.
研究领域:
材料科学
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涂层技术
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腐蚀工程
·
高分子科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Jinqing Chen,Wenqi Xie,Xiangguang Guo,Bin Huang,Yu Xiao,Xiaoqi Sun
In this paper, a series of high performance near-infrared reflective pigments based on Bi 3 YO 6 doped with Fe 2 O 3 and Tb 4 O 7 were prepared by high-temperature calcination method. The pigments were characterized by some analytic techniques, such as XRD , Particle size analyzer, SEM, EDS , UV–vis–NIR spectrophotometer, CIE L*a*b* (1976) color space and infrared thermal imaging. Experimental results showed that the Fe 2 O 3 doping in Bi 3 YO 6 could change the color from bright yellow to ochre red. The substitution of Tb (IV)-doped pigments changed the color to dark orange. The doping of Fe (III) and Tb (IV) contributed to enriching the color diversities of pigments. Among the synthesized pigments, Bi 3-x Fe x YO 6 and Bi 3 Y 1-x Tb x O 6+δ displayed a disordered defective fluorite-type structure. The effect of doping Fe (III) and Tb (IV) reduced the near-infrared reflectance of the pigment. Excepting for Bi 3-x Fe x YO 6 (x = 0.8), the near infrared reflectance of some other pigments were higher than the China National standard (CNs). Chemical resistance tests showed that the pigments had excellent acid and alkali resistance. Finally, the application practical of traditional iron oxide yellow pigment and three prepared pigments, i.e., Bi 3 YO 6 , Bi 3-x Fe x YO 6 (x = 0.4) and Bi 3 Y 1-x Tb x O 6+δ (x = 0.05) were studied and compared by infrared thermal imaging. The test results showed that Bi 3 YO 6 still had a strong near-infrared reflection effect after being painted. Compared with traditional iron yellow pigment, Bi 3 YO 6 could reduce the surface temperature of galvanized sheet by 20 °C under the illumination of infrared light. The series of Fe (III) and Tb (IV) doped pigments prepared in this paper have revealed some promising application values.
研究领域:
材料科学
·
化学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Hao Zhu,Shunyan Ning,Zengzhiqiang Li,Xinpeng Wang,Toyohisa Fujita,Yuezhou Wei,Xiangbiao Yin
Here, a nano disc-shaped bimetallic organic framework (NbCo-piperazine) was prepared by the solvothermal method for the activation of PMS for the degradation of contaminants. The effects of Nb/Co ratio, synthesis time and temperature on the morphology, structure and performance of the NbCo-piperazine catalyst were characterized by XRD, FT-IR, SEM-EDS and TEM. The optimum conditions for NbCo-PZ to activate PMS degradation of tetracycline were investigated by adjusting the dosage of catalyst, tetracycline concentration, pH and PMS concentration. The catalytic performance of NbCo-PZ in the presence of co-existing anions (Cl − , NO 3 – , HCO 3 2– , H 2 PO 4 − ) was also evaluated. XPS explained that cyclic changes in the valence states of Nb 4+ /Nb 5+ and Co 2+ /Co 3+ accelerated the activation of the PMS degradation process. EPR results showed the presence of free radicals (SO 4 ·− , ·OH and O 2 ·− ) and non-free radicals ( 1 O 2 ) in the degradation process, with free radicals playing a major role in the degradation process. The degradation rate of tetracycline after three cycles was 92.2%. In addition, NbCo-piperazine showed good catalytic performance for other organic pollutants such as methyl blue, tylosin tartrate and tetracycline with the degradation rate of 97.8%, 95.2% and 95.5%, respectively. Moreover, it also has good catalytic properties in various water systems such as river water and sea water.
研究领域:
环境化学
·
催化
·
水处理
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 4
·1537-1549
·
IF 3.5
Chen Yongjin,Li Yaru,Fu Jianbo,Zhang Mi,Ren Hui,Jiao Qingjie
Aluminum hydride (AlH 3 ), as a potential new metal fuel, has attracted extensive attention in the field of hydrogen storage materials, propellants and energetic materials due to its excellent properties. In this paper, a new organic liquid phase reduction method was used to prepare AlH 3 , and the microstructure and composition of the prepared samples were characterized by SEM–EDS, XRD, FT-IR, XPS, etc. The main crystal phase of the prepared AlH 3 was α-AlH 3 , with high quality and no other impurities. The thermal decomposition behavior and non-isothermal reaction kinetics of AlH 3 were investigated by TG-DSC. The results show that there are three exothermic stages in the heating process of AlH 3 : dehydrogenation of AlH 3 , first oxidation of Al, and second oxidation of Al. The activation energy of the dehydrogenation of AlH 3 is 77.8675 kJ/mol (Kissinger method) and 81.4862 kJ/mol (Ozawa method), respectively. The morphology evolution of AlH 3 particles during the heating process (300–3000 K) was simulated using a reaction kinetics method based on the ReaxFF force field. The response behavior of AlH 3 in the instantaneous high-temperature detonation environment was investigated using the high-energy laser-induced shock wave technique. Under the impact of a high-energy laser (1006 mJ), the AlH 3 sample undergoes an ultra-fast reaction and generates a large amount of plasma. The expansion of the plasma pushes the surrounding air to form a supersonic shock wave and propagates forward. The shock wave propagation velocity of AlH 3 is 690.99 m/s in the range of 2.1–12.35 μs, and the higher the laser energy, the faster the shock wave propagation velocity. This study provides the basis for the application of AlH 3 . Graphical Abstract
研究领域:
氢存储材料
·
推进剂
·
高能材料
·
材料科学
·
化学工程
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yi Wen,Zheng Huang,Min Zhao,Longshan Zhao
The discharge of industrial heavy metal wastewater not only leads to environmental pollution, but also harms human health, so it is imperative to control heavy metal pollution. In the current work, a sequence of anatase/brookite TiO 2 @COF with different mass ratios, bi-phase TiO 2 and bare COF were successfully synthesized by simple hydrothermal synthesis. The photocatalytic activity of the prepared catalysts was assessed by reducing Cr(Ⅵ) in model pollutant (K 2 Cr 2 O 7 ). Under the condition of pH = 3, the Cr(Ⅵ) reduction rate of TiO 2 @COF-4 was as high as 99.19% in 30 min. The photocatalytic activity of TiO 2 @COF-4 remained stable in four consecutive cycles, suggesting that it has a potential application prospect for the removal of Cr(Ⅵ) in the actual environment. The morphology and structure of photocatalysts were observed by different techniques (SEM/EDS, HRTEM, BET analysis, XRD, FTIR and XPS). The specific reasons for the enhancement of photocatalytic performance of materials were explored by different methods (PL, UV–vis DRS, Mott-Schottky plots, I-T curves and EIS). Finally, we concluded that the photocatalytic system of TiO 2 @COF-4 may follow the typical direct Z- scheme mechanism. This work provides an effective solution for the water treatment of heavy metal pollution.
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Chemistry and Pharmacy
·
2021
·
IF 4.508
Jingbao Wang,Jing Jing,Li Feng,Hailin Zhu,Zhiyong Hu,Xuemei Ma
The corrosion inhibition behavior and adsorption mechanism of three novel synthetic surfactants in 1 M HCl solution on carbon steel were investigated. The PP results confirmed that all the synthetic surfactants behave as mixed-type inhibitors, while the EIS results validated the existence of a protective layer by the adsorption of inhibitor molecules on the carbon surface. T 3 was observed to offer the highest inhibition efficiency ( η w , 96.28%) at 1 mM by the static weight loss measurements due to two different hydrophobic chains which form a more compact film with the crosswise arrangement. SEM/EDS and XPS results revealed the formation of the surfactants film on the carbon steel surface. Molecular dynamics simulation (MD) was further executed to determine the adsorption mechanism in molecular level insights. In addition, a linear correlation between surface activity ( γ ) and corrosion inhibition efficiency ( η w ) was verified. The adsorption of the prepared surfactants followed the Freundlich isotherm at different concentration ranges. Moreover, the bilayer/multilayer adsorption mechanism was also proposed and confirmed by experimental, adsorption isotherm studies and MD. Hence, both MD simulations and experimental results revealed the analogous inhibition with the order follows: T 3 > T 2 > T 1 .
研究领域:
材料科学
·
腐蚀工程
·
表面化学
✓ 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）