Frontiers of Chemical Science and Engineering
·
2021
·Vol. 16
·期 4
·498-510
·
IF 4.204
Bo Jinxiao,Li Mei,Zhu Xinli,Ge Qingfeng,Han Jinyu,Wang Hua
The electrochemical conversion of CO 2 -H 2 O into CO-H 2 using renewable energy is a promising technique for clean syngas production. Low-cost electrocatalysts to produce tunable syngas with a potential-independent CO/H 2 ratio are highly desired. Herein, a series of N -doped carbon nanotubes encapsulating binary alloy nanoparticles (M x Ni-NCNT, M= Fe, Co) were successfully fabricated through the co-pyrolysis of mela-mine and metal precursors. The M x Ni-NCNT samples exhibited bamboo-like nanotubular structures with a large specific surface area and high degree of graphitization. Their electrocatalytic performance for syngas production can be tuned by changing the alloy compositions and modifying the electronic structure of the carbon nanotube through the encapsulated metal nanoparticles. Consequently, syngas with a wide range of CO/H 2 ratios, from 0.5:1 to 3.4:1, can be produced on M x Ni-NCNT. More importantly, stable CO/H 2 ratios of 2:1 and 1.5:1, corresponding to the ratio to produce biofuels by syngas fermentation, could be realized on Co 1 Ni-NCNT and Co 2 Ni-NCNT, respectively, over a potential window of −0.8 to −1.2 V versus the reversible hydrogen electrode. Our work provides an approach to develop low-cost and potential-independent electrocatalysts to effectively produce syngas with an adjustable CO/H 2 ratio from electrochemical CO 2 reduction.
研究领域:
材料科学
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电化学
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可再生能源
·
催化
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DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 23
·7893-7905
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IF 4
Lingjun Shu,Jingxuan Yin,Zhemin Gon,Chengwei Gao,Yongxing Liu,Xiaolong Zhou,Hongli Ma,Xianghua Zhang,Xiang Shen,Shixun Dai,Changgui Lin,Qing Jiao
The fabrication of all electrolytes from noncombustible ceramic materials offers a superior option for providing safer and higher-capacity batteries to fulfill future energy needs. To achieve a competitive performance with combustible liquid electrolytes used in commercial Li-ion batteries, the creation of ceramic material compositions with a high electrical conductivity is necessary. Here, we report that co-doping with W and halogens results in a superconductivity of 13.78 mS cm−1 in a cubic-phase Na3SbS4 glass ceramic electrolyte. After undergoing high-temperature heat treatments, the W ions in the electrolyte can facilitate the replacement of S atoms with halogens, introducing many Na vacancies. The samples also had a high degree of cycling stability. An excellent glass ceramic electrolyte for Na ion batteries will be constructed for Na3SbW0.25Cl0.25S4.
研究领域:
材料科学
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电化学
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固态离子学
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能源存储
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无机非金属材料
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电池技术
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 27
·22250-22268
·
IF 3.289
Z. Zhang,N. C. Tian,X. D. Huang,W. Shang,L. Wu
The synergistic corrosion inhibition effect of indigo carmine and three kinds of cationic organic compounds on 1045 carbon steel (CS) in 0.5 M HCl solution is reported. Electrochemical measurements showed that these three cationic organic compounds combined with indigo carmine reduce the speed of corrosion on 1045 CS and act as effective inhibitors. The combination of indigo carmine with BAB resulted in the best synergistic corrosion inhibition effect (S = 17.14), and the best inhibition efficiency (95.0%). SEM images and XPS data of the corroded steel surfaces suggested that the indigo disulphonate anion and organic cation could be simultaneously adsorbed on the CS surface to inhibit the corrosion of iron. The synergistic inhibition mechanism was investigated by dynamic simulations using quantum chemistry.
研究领域:
材料腐蚀与防护
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物理化学
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金属材料科学
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表面科学
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电化学
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量子化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shujuan Lian,Xiaoshuang Shi,Mingyi Lu,Mengdan Zhang,Xiaohuan Dong,Xu Li,Quan Feng,Rongbo Guo
Due to the persistence in residue and the emission to environment, antibiotics have become the emerging contaminants. Tetracyclines, as the largest amount of antibiotics in the breeding industry, were investigated in this study. For eliminating the tetracyclines, anaerobic culture was enriched from livestock waste after four generations and FeOn(OH)m modified oyster shell powders (OSPs) were amended into the enrichment culture as auxiliary method. Tetracycline and oxytetracycline were selected as the model compounds. The adsorption models (Langmuir and Freundlich isotherms) of tetracycline and microbes on OSPs were simulated respectively. With the addition of FeOn(OH)m modified OSPs, the transformation efficiency of oxytetracycline achieved 81.5% after 22 days’ incubation, approximately 1.85 times higher than the 4th generation (G-IV) enrichment culture without modified OSPs. Dehydration, demethylation, dehydroxylation and decarboxylation took place under anaerobic condition, inferred from the detected metabolites transformed from oxytetracycline. Genus Methanosarcina and two operational taxonomic units (OTUs) assigned to order Clostridiales , showed an increasing trend on abundance, indicating the contribution to transformation of oxytetracycline. Therefore, the FeOn(OH)m modified OSPs and enrichment culture can accelerate the transformation of oxytetracycline simultaneously, indicating a promising utilization not only for waste water system but also for antibiotic contaminated biomass treatment.
研究领域:
环境微生物学
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污染物生物降解
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环境工程
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抗生素去除
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吸附材料
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厌氧消化
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药物代谢
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Alimujiang Yalikun,Yanhong Wang,Yun Lv,Yaling Dou,Hyun-Joo Koo,Jiaojiao Cao,Wei Qi,Keke Huang,Myung-Hwan Whangbo,Zhongwen Ouyang,Hongcheng Lu
A series of analogous chain selenite chlorides Ba2M(SeO3)2Cl2 (M = Cu 1, Ni 2, Co 3, Mn 4) and Pb2Cu(SeO3)2Cl2 5 with tunable spin S from S = 1/2 to S = 5/2 have been hydrothermally synthesized and characterized. These analogues crystallized in the orthorhombic Pnnm space group (monoclinic P21/n space group for 5) all containing M2+–SeO3–M2+ spin chains, which are further separated by the Ba2+ ions (Pb2+ for 5). The magnetic susceptibility results of 1, 2, and 5 show broad maxima around 80.0, 18.9, and 78.0 K, respectively, indicating good one-dimensional (1D) magnetism. Meanwhile, no long-range order (LRO) is observed down to 2 K for both 1 and 5, while the isostructural compounds 2, 3, and 4 exhibit LRO at 3.4 K, 10.8 K, and 5.7 K, respectively, which are further confirmed by the heat capacity and electron spin resonance results, as well as the observed spin-flop transitions in the M–H curves measured at 2 K below TN. The magnetizations of 1–5 at 7 T are still far from saturation. In addition, thermal stability and FT-IR and UV–vis–NIR spectroscopy of 1–5 are reported.
研究领域:
无机化学
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材料科学
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固体物理
·
磁学
·
晶体学
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DOI
高影响因子
Journal of the Korean Ceramic Society
·
2026
·
IF 4.4
Liu Jiahang,Chen Yumeng,Wang Yiyong,Lu Zhe,Zhou Yanwen,Lee Jun-Seob,Choi Heekyu,Li Yan,Guo Honglin,Jung Yeon-Gil
The targeted design of composition and properties for high-entropy rare-earth zirconates (HE-RE 2 Zr 2 O 7 ) using thermal properties tailoring theory represents a research hotspot in the field of thermal barrier coatings. This work designed and synthesized a class of HE-RE 2 Zr 2 O 7 via solid-state reaction by adjusting the mass disorder, size disorder, and electronegativity, including (La 0.2 Ho 0.2 Sm 0.2 Gd 0.2 Tb 0.2 ) 2 Zr 2 O 7 (#Tb), (La 0.2 Ho 0.2 Sm 0.2 Gd 0.2 Er 0.2 ) 2 Zr 2 O 7 (#Er), (La 0.2 Ho 0.2 Sm 0.2 Gd 0.2 Yb 0.2 ) 2 Zr 2 O 7 (#Yb), (La 0.2 Ho 0.2 Sm 0.2 Gd 0.2 Lu 0.2 ) 2 Zr 2 O 7 (#Lu). The phase composition and crystal structure were analyzed using XRD, Raman spectroscopy, and TEM, and the thermophysical and mechanical properties were evaluated. The results demonstrate that as the size disorder increases, HE-RE 2 Zr 2 O 7 gradually transforms from a single-phase structure to a dual-phase structure coexisting with pyrochlore and fluorite. In terms of thermophysical properties, all materials exhibit low thermal conductivity and good correlation with both size disorder and mass disorder. Among them, #Lu demonstrates the most outstanding thermal insulation performance, which is attributed to its strong Umklapp scattering and point defect scattering. Additionally, under the combined effects of electronegativity, lattice energy, and size disorder, #Lu exhibits the highest thermal expansion coefficient. Importantly, doping with different rare-earth elements increases the material’s configurational entropy and degree of lattice distortion, optimizing the high-temperature phase stability and chemical compatibility from the kinetic perspective. In terms of mechanical properties, #Lu exhibits the lowest Young’s modulus, highest hardness, and fracture toughness, which is attributed to its high internal size disorder and lattice distortion. This work employs thermal properties tailoring theory to customize the composition of high-entropy RE 2 Zr 2 O 7 . It is essential for developing RE 2 Zr 2 O 7 thermal barrier coatings with tunable thermophysical properties.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Qinzhi Wang,Yijian Zhao,Zhan Shi,Xinyu Sun,Tong Bu,Changqiu Zhang,Zexiang Mao,Xiaohan Li,Li Wang
Azo dyes in soft drinks present a serious risk to human health and are strictly limited in many countries. Herein, we demonstrate that covalent-organic framework (COF) can be facilely grown on magnetic metal–organic framework (MOF) to form three kinds of porous Fe 3 O 4 @MOF(M = Fe, Ti, Zr)@COFs composites for efficient azo dyes adsorption. Adsorption performances of Fe 3 O 4 @MOF(M = Fe, Ti, Zr)@COFs toward azo dyes were systemically investigated by adsorption kinetics , adsorption isotherms and adsorption thermodynamics. Under optimized conditions, the maximum adsorption capacities of both Fe 3 O 4 @MOF(Fe)@COF and Fe 3 O 4 @MOF(Zr)@COF for Congo red (CR) are 1250.02 and 625.13 mg g −1 , and the Fe 3 O 4 @MOF(Ti)@COF for Chrysoidine (CYD) is 294.12 mg g −1 , all which are higher than those of mostly previous reports. Furthermore, possible mechanisms of adsorption were revealed through Fourier-transform infrared spectra and X-ray photoelectron spectroscopy analysis. These Fe 3 O 4 @MOF(M = Fe, Ti, Zr)@COFs composites also present good biocompatibility, and exhibit high adsorption capacities for CR or CYD in soft drinks, which can be suggested as effective adsorbents for the azo dyes removal from soft drinks.
研究领域:
环境科学
·
材料科学
·
化学工程
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 23
·11242-11254
·
IF 3.925
Lihong Tao,Jun Chen,Jianjun Zhao,Sydorov Dmytro,Qian Zhang,Shengwen Zhong
In view of the disadvantage of the limited active site utilization due to the easy aggregation of phthalocyanine compounds, three kinds of graphene composite metal phthalocyanines (TN-MPc@GN, M = Fe, Co, Ni) were prepared using an in situ composite method, and their electrochemical properties were investigated as anode materials for lithium-ion batteries. The layered structure and large specific surface area of graphene are used to disperse phthalocyanine uniformly, so that the conjugated structure (CC/CN/NO) of phthalocyanine is more exposed and the utilization of active sites for embedding lithium ions are greatly enhanced. At the same time, the large surface area is beneficial to the contact between materials and the electrolyte, which results in a faster transmission path. As a result, the first discharge specific capacities of the graphene composite phthalocyanine (TN-MPc@GN, M = Fe, Co, Ni) electrodes are 440.8, 765.0 and 753.9 mA h g−1, respectively. After 420 cycles, the specific capacities increased to 734.6, 844.7 and 949.1 mA h g−1, respectively, which are much higher than those of the pristine three phthalocyanine (TN-MPC, M = Fe, Co, Ni) electrodes without the graphene composite. Using the graphene composite can be an effective strategy to improve the utilization of active sites of organic electrode materials in lithium-ion batteries.
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Zhengwen Wei,Xiang-fei Lü,Wei Wang,Giuseppe Mele,Zhen-Yi Jiang
Phenanthrene (PTH) and 9-phenanthrol (9-PTH) exhibited severe health threats and ecological hazards, for this reason, exploring a high-efficient removing strategy for PTH and 9-PTH could be considered of great urgency. Herein the 4,4'-biphenyldicarboxaldehyde m-phenylenediamine Schiff base magnetic polymer (magnetic BIPH-PHEN) was successfully fabricated via Schiff base polycondensation reaction and the subsequently one-pot embedded method. The mutual aromatic nucleus of BIPH-PHEN polymer and PTH/9-PTH could form π–π interaction, thus improving the capture ability, the embedded Fe 3 O 4 nanoparticles provided the possibility for rapid separation. The physical and chemical properties of the magnetic BIPH-PHEN were systematically characterized. The removal rate of magnetic BIPH-PHEN towards PTH and 9-PTH was 85.65 % and 98.52 %, respectively (PTH or 9-PTH: 8 mg/L; Adsorbent: 0.2 g/L). The DFT calculations including energy calculations and electrostatic potential distribution analyzed the different bonding modes and proposed the most possible bonding modes in the adsorbent/adsorbate system. Moreover, the LUMO and HOMO orbits combined with energy gaps analysis proved the existence and specific types of the π–π interaction. The monolayer adsorption occurred on the homogeneous magnetic BIPH-PHEN surface, simultaneously the chemisorption was dominant. This work not only proposed new sights on assembling magnetic Schiff base polymer for removing polycyclic aromatic hydrocarbons, but also provided a deeper understanding of intramolecular interactions.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2022
·Vol. 103
·期 3
·865-875
·
IF 2.606
Jia Jiannan,He Mengting,Wang Yunpeng,Zhang Wei,Wan Jun,Zhang Yuting,Xu Qiang,Chen Shiguo,Qiao Xvsheng,Fan Xianping
A propylene oxide (PO)-driven fast sol-gel route followed with a post high temperature calcination were utilized to synthesize Ca x Sr 1- x Al 2 O 4 : Eu 2+ cationic solid solution phosphors with micro-spherical morphologies and improved internal quantum efficiencies. The polyethylene oxide (PEO) was also employed to induce the phase separation of Ca x Sr 1- x Al 2 O 4 : Eu 2+ precursors to get monodispersed spherical morphologies in the sol-gel system. Benefit from uniform copolymerization of each chemical components and pyrolysis of organic matter, Ca, Sr, Al and O were homogenously distributed in the produced Ca x Sr 1- x Al 2 O 4 : Eu 2+ cage like microspheres. It helps to efficiently trap incident light and to improve the PL efficiencies. By changing the ratio of Ca/Sr, infinite solid solution polycrystalline phosphors, Ca x Sr 1- x Al 2 O 4 : Eu 2+ microspheres with x = 0~1, can be obtained and their PL emission can be gradually tuned from green to white to blue. Micro-spherical SrAl 2 O 4 : Eu 2+ , Ca x Sr 1- x Al 2 O 4 : Eu 2+ and CaAl 2 O 4 : Eu 2+ phosphors exhibited internal quantum efficiencies as high as 71.1, 35.3~45.9 and 75.3%, respectively.
Graphical abstract
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Tingting Ge,Hui Guo,Cuncun Zuo,Yanxia Zheng,Shuyue Li,Haofei Huang,Ming Wang,Guangjun Cui,Xinpeng Guo,Yuchao Li
Series of magnetic metal-doped cerium oxide (MCeO x , M = Fe, Co and Ni) were synthesized and applied to support nano-gold (Au) as catalyst for synthesis of methyl methacrylate (MMA) through gas-liquid-solid three-phase oxidation esterification of methacrolein (MAL) and methanol (MeOH). Hydrothermal synthesis method was applied for MCeO x preparation and deposition-precipitation method was for nano-Au supported catalyst. The catalysts were characterized through XRD, H 2 -TPR, NH 3 -TPD, FT-IR, TG, BET, TEM-EDS and VSM. Results showed that Au/FeCeO x had strong magnetic properties and could be easily separated by external magnetism. Moreover, the doping of Fe could improve the redox properties and acidic sites of the catalyst. Catalyst performances were evaluated in a micro batch reactor. 5% - Au/FeCeO x allowed the highest reaction activity to be observed with MAL conversion of 80.2% and MMA selectivity of 96.1%. Surface catalytic reaction mechanism on Au/CeO 2 was established and transition states of oxidative esterification were obtained using density functional theory (DFT). Magnetically recoverable nano-Au/FeCeO x catalysts maintain stable activity after 5 cycles, which makes it a promising catalyst for industrial application.
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DOI
高影响因子
SYNTHETIC METALS
·
2021
·
IF 3.266
Yaoyao Hao,Yinyue Zhou,Nuohan Xu,Kaixun Tian,Pei Liang,He Jiang
Iron oxide @ poly(m-phenylenediamine) (Z) particles (Fe 3 O 4 @PmPD(Z)) were synthesized by in-situ polymerization of PmPD on the Fe 3 O 4 nanoparticles via ZIF-8 intermediate platform to remove Cr(VI) from wastewater. Analyses of FT-IR, TEM, etc. were performed to evaluate the morphology and structure of synthesized material, and the results confirmed the successful synthesis of Fe 3 O 4 @PmPD(Z). In addition, the TEM and BET analyses results show that the PmPD shell is a flocculating structure, and the increased specific surface area increases the contact with Cr(VI). The Fe 3 O 4 @PmPD(Z) exhibits much better Cr(VI) adsorption performance than Fe 3 O 4 @PmPD, and its adsorption capacity is increased by about 30%, the maximum Cr(VI) adsorption capacity can reach 371.75 mg g −1 at 318 K. According to FT-IR, XPS , and EDS , the removal mechanisms can be attributed to the redox reaction of Cr(Ⅵ) and NH to form N and Cr(Ⅲ), and N shares electron pair with Cr(Ⅲ) to form chelation. At the same time, the appearance of N + also contributes to the removal of Cr(Ⅵ) by generating electrostatic attraction with the negatively charged HCrO 4 - . Besides, the Fe 3 O 4 @PmPD(Z) also exhibits excellent properties of recovery and reuse. Therefore, the current work proves that Fe 3 O 4 @PmPD(Z) has the potential to remove heavy metals in wastewater.
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高影响因子
危险品化学品经营许可证（带存储）