SYNTHETIC METALS
·
2021
·
IF 3.266
Ruixue Wu,Caifeng Bi,Lulu Wang,Jinmiao Wang,Chuanbin Fan,Nana Li,Mei Wang,Feng Shao,Guobo Chen,Yuhua Fan
In this work, five novel Cd/Zn-based MOFs with different topological framework, namely {[Cd(bimb)(Hbipa)]·H 2 O} n (1), {[Cd 3 (dimb) 3 (bipa) 2 (H 2 O) 2 ]·2H 2 O} n (2) , [Cd(bimd)(Hbipa)(H 2 O)] n (3) , {[Zn(bipd)(Hbipa)]·H 2 O} n (4) and [Zn(bimb)(Hbipa)] n (5) had been synthesized and characterized. Worth noting, Complex 1 and 2 had effective separation behaviors towards MO and MBE dyes respectively, which could reach the adsorption equilibrium within a quite short time even if there existed another kind of dye in the system. Meanwhile, Complex 3 – 5 showed great performance in CR adsorption. Additionally, Complex 3 – 5 also showed excellent photocatalytic degradation capabilities toward MB and MV dyes under UV irradiation. According to the study, these five metal-organic frameworks can be used as a kind of functional materials in the adsorption and photocatalytic degradation of organic dyes in wastewater.
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高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Danke Chen,Jiapeng Ji,Zhongqing Jiang,Min Ling,Zhongjie Jiang,Xinsheng Peng
Transition metal-nitrogen-carbon (M/N/C) catalysts, Fe/N/C in particular, with low cost, good tolerance to methanol and promising activity has great potential to replace Pt-based catalysts in oxygen reduction reaction (ORR). However, for metal atoms are easy to migrate and agglomerate during pyrolysis , it still remains a challenge to rationally design precursors to synthesize highly active M/N/C without significant agglomeration of metal sites. In this work, we propose a molecular-confinement strategy to synthesize sub-nano Fe/N/C catalysts by confinement [Fe(CN) 6 ] 3- in zeolitic imidazolate framework-8 (ZIF-8) crystals to minimize the agglomeration of Fe atoms during pyrolysis . The half-wave potential of the prepared sub-nano Fe/N/C is 40 mV superior to that of commercial 20% Pt/C in alkaline medium . Besides, it has electron transfer number close to 4.00, with below 0.5% H 2 O 2 yield, excellent long-term stability with only −5 mV shifts after 10000 cycles, and superb methanol tolerance. When utilized in Zn-air batteries as the cathode, it exhibits better activity, stability, and higher specific capacity than that of Pt–RuO 2 /C, showing a good potential for air cathode.
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APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Hardy Shuwanto,Hairus Abdullah,Dong-Hau Kuo,Noto Susanto Gultom
Y-doped Zn(O,S) nanocatalysts with different Y amounts have been fabricated, characterized, and applied for photocatalytic hydrogen evolution reaction (HER) and hydrogenation reaction (PHR) to reduce nitro groups and to cleave azo (N N) bond. The oxysulfide formation was confirmed by XRD, SAED, and DRS analyses. The best Y-doped Zn(O,S) could evolve hydrogen by 3,946 μmol g −1 h −1 in aqueous solution with ethanol as a hole scavenger reagent. The PHR of 5% Y-doped Zn(O,S) could hydrogenate 4-nitrophenol to 4-aminophenol and nitrobenzene to aniline in 120 and 90 min, respectively in a low-power UV light illuminated condition (16 W) as confirmed with UV–Vis spectroscopy. Besides of that, a sluggish cleavage of N N bond in azobenzene could be totally done to yield aniline within 30 min. Lastly, the detail mechanisms of HER and PHR including their molecular chemisorption phenomena were proposed and described with the steps of solvation , adsorption, pinning, and surface hydrogenation reactions.
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Nanoscale
·
2019
·Vol. 11
·期 21
·10257-10265
·
IF 6.97
Chenbao Lu,Jichao Zhang,Zhenying Chen,Kaiyue Jiang,Mingqiang Li,Fan Zhang,Gangsheng Tong,Xiaoxin Zou,Yuezeng Su,Xiaodong Zhuang
The development of nonprecious and efficient catalysts to boost the oxygen reduction reaction (ORR) is imperative. However, the majority of previously reported approaches suffered from a complicated fabrication procedure, both time consuming and difficult to scale up. Herein, large-scale iron ion embedded polyaniline fibers were successfully fabricated as precursors for preparing iron/nitrogen co-doped fibrous porous carbons (Fe/NPCFs) through an interfacial engineering strategy at room temperature. As ORR electrocatalysts in an alkaline medium (0.1 M KOH), Fe/NPCFs display a positive half-wave potential of 0.827 V (vs. RHE), and high limited current density (up to 5.76 mA cm−2), which are better than those of commercial Pt/C (E1/2 = 0.815 V, JL = 5.47 mA cm−2). Also, Fe/NPCFs exhibit a high ORR catalysis activity (E1/2 = 0.632 V, JL = 5.07 mA cm−2) in acidic medium (0.5 M H2SO4). When used as an air cathode in a primary Zn–air battery, high power density (158.5 mW cm−2) and specific capacity (717.8 mA h g−1) can be easily achieved, outperforming the commercial Pt/C.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Siyuan Sun,Xiaoyun Zhang,Yang Sun,Fan Yang,Tianyu Bai,Cunhui Yu,Kexin Wei,Haojia Zhong,Qiang Wei,Yongfeng Li
Porous carbon coated manganese compounds nanoparticles (MnX, X = P, O or S) is a kind of potential catalysts for oxygen electrocatalysis due to the controllable d-band center, while the complex mechanism and performance difference is yet to reveal due to the lack of catalyst platform. Herein, the ORR catalytic activity and difference reason between manganese phosphide, oxide, and sulfide are tested and discussed via manganese compounds contained carbon-based catalyst platforms synthesis and Density functional theory (DFT). Manganese compounds nanoparticles active sites are uniformly distributed in porous carbon fibers/graphene composite, which guarantees the high mass transfer ability and conductive ability. Experiment results show that catalyst with Mn 2 P active sites exhibits best bifunctional catalytic activity for ORR/OER, which only need 0.89 V (vs. RHE) to achieve a half-wave potential (E 1/2 ) in ORR and 1.58 V (vs. RHE) to reach the overpotential at 10 mA cm −2 (E 10 ) in OER. Theoretical analysis shows that the d-band center of Mn in Mn 2 P is much closer to the Fermi level than MnS and MnO. The rate-determining process of Mn 2 P has the smallest energy barrier of 0.56 eV, indicating the best ORR activity. This work provides paves a solid way for the synthesis of carbon-based catalysts with manganese compounds active sites.
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PubMed
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2025
·Vol. 23
·期 1
·1-23
·
IF 12.6
Zuo Kangqing,Li Aonan,Si Taoning,Lei Weiyi,Liu Yusheng,Zhang Linbo,Zhang Taixing,Xiao Guiyong,Lu Yupeng,Li Ningbo
Phosphate conversion coatings on metallic implants can synergistically integrate functional components and structural regulation, offering excellent biocompatibility and osteogenic activity. However, the passive oxide layer on the titanium (Ti) surface impedes the following chemical reactivity, adversely affecting the microstructure and properties of phosphate coatings. This study proposes a strategy for achieving structural optimization and properties enhancement of strontium-zinc phosphate (SrZnP) conversion coatings on Ti via regulating interface chemical reaction between coatings and Ti substrates. The results indicated that Sr 2+ and Zn 2+ ions-preloading (IPL) treatment enhanced the interfacial reactivity, which can further achieve crystal refinement and uniform crystal size in nucleation. In contrast, microstructural modifications on Ti substrates induced by acid etching, sandblasting, and alkali etching had minimal effects on the phase composition and crystal morphology (irregular cubic) of the SrZnP coatings. The coatings on IPL-Ti exhibited better mechanical properties and corrosion resistance. Besides, the coatings with optimized structures and surface characteristics elicited bacterial growth inhibition rates of 91.09% and 84.04% against Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E. coli ), respectively. Meanwhile, the crystal-refined coatings further significantly enhanced the adhesion, proliferation, and differentiation of bone marrow mesenchymal stem cells (BMSCs), proving anticipated osteogenic activity. Overall, the ions preloading strategy on variable micro/nanostructured Ti substrates facilitates the potential application of Sr/Zn-phosphate conversion coatings for repairing infected bone defects.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yunong Qin,Guoliang Lai,Ye Guo,Ling Li,Wenming Zhang
Co/Fe/CoFe-CNAs@NHCNFs has been synthesised through a template-free approach that exploits the synergistic effect of Co, Fe, and N-doped hollow carbon nanofibres. This resulting Co/Fe/CoFe-CNAs@NHCNFs catalysts display enhanced electrical conductivity and an expanded active surface area. The Co/Fe/CoFe-CNAs@NHCNFs catalyst exhibits remarkable electrocatalytic performance and achieves an oxygen evolution reaction (OER) an overpotential of only 1.55 V (10 mA cm −2 ), which shows excellent electrochemical properties. It is evident that the collaborative reaction among Co, Fe, and N refines the electronic configuration, thereby increasing the efficiency of electron transfer and strengthening the catalytic activity.The incorporation of N-doping enriches the catalyst with an augmented array of catalytic centers., which are highly effective for facilitating the oxygen reduction reaction (ORR) and OER, consequently lowering an activation energy required for these reactions. Its electrochemical performance is more remarkable than conventional Pt/C. The liquid zn-air battery based on Co/Fe/CoFe-CNAs@NHCNFs exhibites an open-circuit voltage reaching 1.396 V, the peak power density achieved was 253 mW cm −2 . Under a constant current discharge condition of 10 mA cm −2 , the battery exhibited over 60 hours of good cycling stability with no significant performance degradation. The solid-state rechargeable Zn-air batteries (RZABs) based on Co/Fe/CoFe-CNAs@NHCNFs catalyst demonstrate exceptional energy storage capacity and stability, exhibiting promising potential for practical applications
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Yingjian Yu,Xiaolong Chen,Dan Zheng,Yulong Li,Zhuqi Chen,Rong Chen,Lie Yang
In this study, a novel iron-zinc bimetal-loaded sludge biochar-based biochar (Fe-Zn@SBC) was prepared for efficient removal of sulfamethoxazole (SMX) from aquatic environments through the activation of periodate (Pl). The addition of bimetals resulted in a unique honeycomb-like microstructure within the biochar, significantly affecting its pore distribution, functional group intensity, and defect characteristics. The Fe-Zn@SBC catalyst demonstrated exceptional performance in activating PI across a wide range of pH conditions and exhibited robustness against interference from prevalent contaminants in water bodies. Quenching experiments, electron paramagnetic resonance (EPR) analysis, and electrochemical assessments indicated that the degradation of SMX primarily occurs through a radical pathway driven by superoxide radicals, alongside a non-radical pathway facilitated by electron transfer. The synergistic interaction between Fe-Zn@SBC and PI enhanced the degradation of SMX into various small molecular intermediates, thereby contributing to the safety of aquatic ecosystems. This research presents an innovative modification strategy for sludge biochar, providing an effective and environmentally sustainable approach to mitigating pollution from pharmaceutical active compounds (PhACs) in aquatic systems.
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高影响因子
PLoS One
·
2020
·Vol. 15
·期 1
·e0228247
·
IF 2.74
Congcong Liu,Jingcheng Wang,Chengde Gao,Zhenting Wang,Xiaohua Zhou,Mingying Tang,Kun Yu,Youwen Deng
Magnesium-based biomaterials are attracting increasingly more attention for orthopedic applications based on their appropriate mechanical properties, biodegradability, and favorable biocompatibility. However, the high corrosion rate of these materials remains to be addressed. In this study, porous β-Ca 3 (PO 4 ) 2 /Mg-Zn (β-TCP/Mg-Zn) composites were fabricated via a powder metallurgy method. The β-TCP/Mg-Zn composites with 6% porosity exhibited optimal mechanical properties, and thus, they were selected for surface modification. A novel dopamine/gelatin/recombinant human bone morphogenetic protein-2 (rhBMP-2) coating with demonstrated stability was prepared to further improve the corrosion resistance of the composite and enhance early osteoinductivity. The homogeneously coated β-TCP/Mg-Zn composite showed significantly improved corrosion resistance according to electrochemical and immersion tests. In addition, extracts from the dopamine/gelatin/rhBMP-2–coated β-TCP/Mg-Zn composite not only facilitated cell proliferation but also significantly enhanced the osteogenic differentiation of Sprague–Dawley rat bone marrow-derived mesenchymal stem cells in vitro . Furthermore, in vivo experiments were performed to evaluate the biodegradation, histocompatibility, and osteoinductive potential of the coated composite. No obvious pathological changes in the vital visceral organs were observed after implantation, and radiography and hematoxylin-eosin staining showed strong promotion of new bone formation, matched composite degradation and bone regeneration rates, and complete absorption of the released hydrogen gas. Collectively, these results indicate that the dopamine/gelatin/rhBMP-2–coated β-TCP/Mg-Zn composite offers improved corrosion resistance, favorable biocompatibility, and enhanced osteoinductive potential for use in the fabrication of orthopedic implants.
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PubMed
高影响因子
Catalysts
·
2024
·Vol. 14
·期 1
·88
·
IF 3.8
Zheng Dong,Yuanchong Yue,Jianmei Bai,Kun Chen,Mei Wang,Quan Bu
Peanut shells, a major economic and oil crop in China, boast an abundant availability and remarkably high lignin content compared to other agricultural residues. Previous work indicated that the modified hierarchical zeolite (Zn-ZSM-5/MCM41) was effective in promoting the conversion of intermediate macromolecules during the lignin pyrolysis reaction and enhancing the yield and selectivity of liquid products. Thereby, this study aims to improve the quality of liquid products in the ex situ catalytic microwave co-pyrolysis of peanut shells and LDPE by utilizing Zn-ZSM-5/MCM41. Employing a compound center experimental design, we optimized reaction conditions through response surface analysis. The impact of microwave pyrolysis temperature and the catalyst-to-feedstock ratio on yield distribution and liquid product selectivity was explored. Results indicated a marginal increase in liquid product yield with rising pyrolysis temperatures. Moreover, an initial increase followed by a subsequent decrease in liquid product yield was observed with an increase in the catalyst-to-feedstock ratio. Optimal conditions of 450 °C and a catalyst-to-peanut hull ratio of 2.34% yielded the highest bio-oil yield at 34.25%. GC/MS analysis of the bio-oil revealed a peak in hydrocarbon content at 68.36% under conditions of 450 °C and a catalyst-to-feedstock ratio of 13.66%. Additionally, the quadratic model effectively predicted bio-oil yield and the selectivity for major chemical components. This study underscores the potential of Zn-ZSM-5/MCM41 in optimizing liquid product quality during catalytic co-pyrolysis, offering insights into bio-oil production and its chemical composition.Keywords:bio-oil;pyrolysis;catalyst;LDPE;biomass
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CATALYSIS LETTERS
·
2016
·Vol. 147
·期 2
·502-508
·
IF 2.294
Chen Yao,Liu Cheng-chao,Zhang Yu-hua,Zhao Yan-xi,Wei Liang,Wen Xiong,Zhao Xin,Li Jin-lin
Abstract Hierarchically ZSM-5 zeolite was prepared by alkali treatment. It was used as a support for a series of Co-based catalysts for Fischer–Tropsch synthesis with Fe, Ti, Ga or Zn as promoter. This series of catalysts were named Co/M-ZSM-5 (M = Fe, Ti, Ga or Zn). The catalysts were characterized by SEM, XRD, H 2 -TPR, and XPS, and the FTS catalytic performance of catalysts were compared. The character date revealed that the promoter changed the dispersion, reducibility and stability of Co. The addition of Zn and Ga increased the activity of catalysts, decreased the selectivity to CH 4 . The Ti promoted catalyst had the highest initial activity, but it deactivated rapidly. The suitable interaction between Co and the Fe-ZSM-5 result in the suitable dispersion and reduction. Thus Fe is the better promoter for the catalyst Co/ZSM-5. Graphical Abstract
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Peng Wang,Zijing Liu,Yanwei Xing,Bin Fan,Yulong He,Ting Gao,Wenlei Zhang,Yunfei Gao,Shuang Wang,Jinping Li
Electrocatalytic nitrogen reduction reaction (ENRR) is considered as a potential pathway for green synthesis of ammonia. However, the kinetic barriers of ENRR remain a tough challenge, which is imperative to design high effective electrocatalysts for accelerated activation of N N. Herein, the FeS/ZnS/ZIF-8-L with rich heterogeneous interfaces was successfully fabricated by governing the ordered lasso arrangement of Fe and Zn nodes in Fe-2MIM/ZIF-8-L precursor, where Fe and Zn were separately fixed in the confined space of ZIF-8-L and Fe-2MIM. Such intertwined Fe-2MIM/ZIF-8-L structure was beneficial to control the location and concentration of FeS and ZnS after sulfidation pyrolysis. The high-efficiency FeS/ZnS/ZIF-8-L exposed more catalytic active sites and possessed optimal electronic structure resulting in the lowered energy barrier of ENRR and the enhanced adsorption and activation of N 2 , which confirmed by experimental and theoretical characterization results. As a result, FeS/ZnS/ZIF-8-L displayed an optimal NH 3 yield rate of 89.52 μg h −1 mg −1 and Faradaic efficiency of 16.78 %, which surpassed most reported heterostructured ENRR catalysts. Our findings shed a new insight to govern the interfaces density of heterostructured electrocatalysts by predesigning the location of two metals in precursor, which can motivate an in-depth exploration to advanced catalysts for various electrocatalytic reactions.
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