ENERGY CONVERSION AND MANAGEMENT
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2023
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IF 10.4
Yimin Xiong,Xuepeng Wang,Wei Deng,Zhe Xiong,Jun Xu,Long Jiang,Sheng Su,Song Hu,Xun Hu,Xiangpeng Gao,Jianlan Li,Yi Wang,Jun Xiang
Biomass utilization coupled with CO 2 fixation offers a promising approach to produce sustainable carbon–neutral biofuels and chemicals while contributing to reducing CO 2 emissions. In this study, we proposed a method for synchronous bio-oil upgrading and CO 2 fixation by co-electrolysis in a sealed, undivided cell equipped with a metal cathode and a sacrificial anode. Results showed that the reactive components in bio-oil reacted with CO 2 during co-electrolysis, enhancing the abundance of the esters and formic acid by 57.2% and 270.2%, respectively. The CO 2 fixation rate was enhanced by 4.6% after co-electrolysis of bio-oil and CO 2 , with the control experiment in the absence of bio-oil. Additionally, the Cu cathode showed superior catalytic activation for upgrading bio-oil and achieving the highest CO 2 fixation, owing to its high selectivity for multi-electro transfer products. To summarize, the ketones and the phenolic derivatives in bio-oil could react with CO 2 to form organic esters and acids, while the 2–3 rings and heavy components in bio-oil tended to polymerize and generate insoluble products (polymers). Ultimately, we proposed a carbon-negative distributed biomass processing station system and discussed the future perspective on synchronous bio-oil upgrading and CO 2 fixation by co-electrolysis in this work.
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JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
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2018
·
IF 3.046
Jing Wang,Xinyue Hu,Yuexing Li,Huimin Wen,Zhili Zuo,W.A. Muhammad,John Q. Xiao,Jun Hu
Magnetic nanowire arrays grown in anodized alumina templates offer a fertile ground to investigate the interplay among the exchange interaction, dipolar interaction, and magnetocrystalline anisotropy. In this study, we have successfully fabricated Co nanowire arrays with gradient diameter while maintaining the nanowire separation. Consequently, we are able to obtain nanowire arrays with dominant exchange interaction at one end with small nanowire dimeter and dominant dipolar interaction at the other with large nanowire diameter. These samples show very different magnetic properties from those observed in magnetic nanowire arrays with uniformly diameter. The easy magnetization axis, coercivity, saturation field, and reversal processes are all controlled collectively by both ends of the nanowires, which cannot be viewed as the combination of magnetic nanowire arrays with thin and thick diameters.
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POLYMER ENGINEERING AND SCIENCE
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2018
·Vol. 58
·期 12
·2185-2191
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IF 1.551
Xuying Nan,Yi Huang,Jianzhong Shao,Huiqiong Yan,Mingshu Wu,Yuhua Yao
Silk peptide used as a co-initiator in type 2 photo-initiator has not been known. In this study, the photoinitiation system is composed of the sensitizer, the synergist and silk peptide with low molecular weight (<3,500), which is used to initiate photopolymerization of common monomer. The same photopolymerization was performed to evaluate the co-initiating ability of four essential amino acids of silk peptide, and of four pentapeptides synthesized using them as substrates, respectively. It was suggested that the glycine residue and alanine residue on silk peptide might be mainly responsible for the co-initiating role. And the co-initiating function might be ascribed to the electron/hydrogen donation of silk peptide. Silk peptide combined with the sensitizer and iodonium salt could also efficiently initiate photo-curing of hydrogel precursors. And due to excellent water solubility of silk peptide, the water absorption of the formed hydrogel could be further improved. These studies will open an opportunity for the application of silk peptide as a biocompatible co-initiator. POLYM. ENG. SCI., 58:2185–2191, 2018. © 2018 Society of Plastics Engineers
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RSC Advances
·
2018
·Vol. 8
·期 50
·28684-28691
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IF 2.936
Ka Wang,Weilan Guo,Shancheng Yan,Haizeng Song,Yi Shi
The traditional method of preparing hydrogen and oxygen as efficient clean energy sources mainly relies on the use of platinum, palladium, and other precious metals. However, the high cost and low abundance limit wide application of such metals. As such, one challenging issue is the development of low-cost and high-efficiency electrocatalysts for such purposes. In this study, we synthesized Co–FeS2/CoS2 heterostructures via a hydrothermal method for efficient hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Benefitting from their unique three-dimensional hierarchical nanostructures, Co-doped FeS2, and CoS2 formed heterostructures on Co–FeS2 petals, which bestowed remarkable electrocatalytic properties upon Co–FeS2/CoS2 nanostructures. Co–FeS2/CoS2 effectively catalyzed the OER with an overpotential of 278 mV at a current density of 10 mA cm−2 in 1 M KOH solution, and also is capable of driving a current density −10 mA cm−2 at an overpotential of −103 mV in 0.5 M H2SO4 solution. The overpotential of the OER and HER only decreased by 5 mV and 3 mV after 1000 cycles. Our Co–FeS2/CoS2 materials may offer a promising alternative to noble metal-based electrocatalysts for water splitting.
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PubMed
高影响因子
ENVIRONMENTAL POLLUTION
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2018
·
IF 4.358
Xiaohua Chen,Cai Zhang,Liju Tan,Jiangtao Wang
Cobalt nanoparticles (CoNPs) are being used in wide range of applications and may enter aquatic environments where they pose a potential threat to aquatic organisms. Algal growth inhibition tests were conducted to explore the potential toxicity of CoNPs on marine microalgae, Platymonas subcordiforus, Chaetoceros curvisetus and Skeletonema costatum . This is one of the first time to explore toxicity of CoNPs on marine algae systematically. The results showed that CoNPs induced toxicity on the three algae. The CoNP toxicity on three species microalgae was partly attributed to the Co 2+ released by CoNPs in the f/2 seawater medium. The particle size distribution of CoNPs in seawater revealed that CoNPs were agglomerated in the seawater. The shading effect of CoNPs and scanning electron microscope (SEM) images also showed the aggregating of CoNPs and microalgae, which influenced the photosynthetic utilization and inhibited the growth of the three algae. The order of toxic sensitivity of CoNPs on the three algae was as follows: Platymonas subcordiforus < Chaetoceros curvisetus < Skeletonema costatum .
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PubMed
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
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2019
·Vol. 35
·期 4
·729-734
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IF 1.071
Zhu Changliang,Liu Shaoying,Wang Qingyin,Zhang Hua,Wang Gongying
Poly(butylene carbonate)(PBC) has significantly promising applications as a degradable material in the field of polymers, while its poor thermal performance and low crystallization rate are its main defects. To overcome these shortcomings, a series of poly(butylene carbonate-co-spirocyclic carbonate)(PBSC) copolymers were synthesized from diphenyl carbonate, 1,4-butanediol and spiroglycol via two-step polycondensation reactions, using magnesium oxide as a catalyst. Differential scanning calorimetry(DSC) results indicated that the glass transition temperature( T g ) values of PBSC copolymers were enhanced from −19 °C to 56 °C with rising the spiroacetal moiety content. Thermogravimetric analysis(TGA) results showed that the resulting PBSCs have a higher thermal stability than that of poly(butylene carbonate). Wide angle X-ray diffraction(WXRD) patterns were characterized to investigate the crystallization behaviour of PBSCs. Tensile testing demonstrated that copolymerization of spiroacetal moieties into PBC chains imparted PBSC with favourable mechanical performance. Typically, PBSC30 had a tensile modulus of (1735±430) MPa, a tensile strength of (42±5) MPa and an elongation of 504%±36%.
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DALTON TRANSACTIONS
·
2025
·
IF 3.3
Xuan Yang,Zesen Yu,Hedong Jiang,Huanhuan Guo,Jian Sun,Jiake Li,Hua Zhu,Yanxiang Wang,Pingchun Guo
Metal–organic frameworks (MOFs) are promising candidates for thermochromic materials. In this study, a hydrogen-bonded 3D porous metal–organic framework, Co-BTC (Co3(BTC)2·12H2O, BTC = 1,3,5-benzenetricarboxylate), exhibited a pink color at room temperature, attributed to the d–d transition of Co2+ ions within the framework, and displayed reversible thermochromic behavior due to alterations in the coordination environment of Co2+ ions. Additionally, Co-BTC/PVB thermochromic film was successfully designed and fabricated as a smart window with a monolayer structure. The window exhibited reversible thermochromic behavior comparable to Co-BTC, with visible transmittance modulation of 10.73%, near-infrared transmittance modulation of 25.87%, and solar transmittance modulation of 12.63%. Compared to a pure PVB window, the smart window reduced indoor temperatures by 5.7 °C in field tests, indicating a significant energy-saving effect. This research presents a potential application for the rational design of MOFs in the development of advanced smart windows.
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高影响因子
Materials Science & Engineering C-Materials for Biological Applications
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2016
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IF 3.42
Zhikai Tan,Hongjie Wang,Xiangkai Gao,Tong Liu,Yongjun Tan
There is an increasing demand for functional small-diameter vascular grafts (diameter < 6 mm) to be used in clinical arterial replacement. An ideal vascular graft should have appropriate biomechanical properties and be biocompatible. Electrospinning has become a popular polymer processing technique for vascular tissue engineering, but the grafts fabricated by electrospinning often have relatively small pores and low porosity, which limit cell infiltration into scaffolds and hinder the regeneration and remodeling of grafts. In the present study, we aimed to develop an efficient method to prepare electrospun composite vascular grafts comprising natural and synthetic materials. We fabricated grafts made of polycaprolactone, gelatin, and polyvinyl alcohol (PVA) by co-electrospinning, and the scaffolds were further functionalized by immobilizing heparin on them. The PVA fibers degraded rapidly in vivo and generated electrospun scaffolds with high porosity, which significantly enhanced cell proliferation and infiltration. The mechanical properties of the grafts are suitable for use in artery replacement. Heparin functionalization of the grafts yielded a good antithrombogenic effect, which was demonstrated in platelet adhesion tests. Moreover, in vitro and in vivo results demonstrated that the heparin release from the grafts enhanced the growth of endothelial cells, which is important for the endothelium of implanted grafts. The results of this study indicate that our method is effective and controllable for the fabrication of vascular grafts that meet the clinical requirements for blood vessel transplantation.
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MATERIALS & DESIGN
·
2016
·
IF 3.997
Yuhua Yan,Yanping Tian,Meifeng Hao,Yuqing Miao
The cross-like crystallines of Ni-Co-P microcomposites were synthesized via a simple hydrothermal method under high pressure and temperature which is adapted from the classical electroless deposition technique for surface modification. Here hypophosphite was employed as reductant and phosphorus resource to prepare the composites of Ni, Co and P elements. The obtain Ni-Co-P microcomposites were characterized in morphology, composition and properties. They show the perfect cross-like shape with an approximate stoichiometry of Ni 12 -Co 6 -P 12 -O 70 . The high absorbance in UV area and wide absorbance in vis area are observed. They also exhibit superparamagnetic behavior and hydrogen evolution property.
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高影响因子
RSC Advances
·
2014
·Vol. 5
·期 12
·9130-9137
·
IF 3.708
Jiahuan Lei,Yu Liu,Xinyu Wang,Pan Hu,Xinsheng Peng
Au nanoparticles/mesoporous CuO nanosheets were successfully synthesized by the assembly of negatively charged AuCl4−1 and positively charged CuO nanosheets using sodium citrate and thermal reduction, respectively. The structure and morphology were characterized in detail. Both the loading amount of Au nanoparticles and the performance were controlled by the reduction process. The resulting Au/CuO NSs exhibited good catalytic activity for CO oxidation and good non-enzymatic sensitivity for glucose.
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MATERIALS & DESIGN
·
2015
·
IF 3.501
Hongyao Ding,Hongyan Tang,Feng Wang,Huapeng Zhang,Yuhai Guo
Butyl methacrylate (BMA)/acrylamide (AM) (co)polymers were synthesized through free radical bulk copolymerization by two steps. Effect of synthesis process on the molecular structure and properties of BMA/AM (co)polymers was deeply investigated. 13 C NMR results indicated that AM only participated in copolymerization with BMA, which would be promoted under a higher prepolymerization temperature. A higher conversion ratio of AM could be obtained by batch feeding. FTIR results showed that a higher prepolymerization temperature or batch feeding could increase the content of AM unit in the BMA/AM (co)polymers. DMA results indicated that a higher prepolymerization temperature or batch feeding would induce a higher Tg value of the BMA/AM (co)polymer. DSC and TGA results showed a weight loss at 150–250 °C because of the imidization reactions, which would be increased by a higher prepolymerization temperature or batch feeding. Mechanical properties of PMI foam would increase under a higher prepolymerization temperature or batch feeding. In a word, the molecular structure and properties of the BMA/AM (co)polymers could be controlled.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Xinghang Duan,Qiaolin Li,Tiantian Cao,Shengxiang Xiong,Gang Chen,Chengjun Dong,Hongtao Guan,Zongyou Yin
The development of advanced electromagnetic (EM) wave absorbers is crucial for applications in stealth technology and EM interference shielding. A major challenge in this field is achieving high absorption efficiency across a broad frequency range while maintaining lightweight and structurally robust materials. In this study, we successfully developed a precise and flexible synthesis strategy to prepare hollow C/Co/Mo2C cubes using Zn/Co(C4O4)(H2O)2 as a flexible template, which offers the advantages of simultaneous removal and easy control of metal Co content. The shell of the hollow cubes can be further optimized by changing the oxidizer content for polypyrrole (PPy). At optimum shell thickness and Co content, the C/Co/Mo2C-0.4 composites, featuring hollow but perforated structures, exhibit superior EM wave absorption properties, with a minimum reflection loss (RLmin) of −73.46 dB and an effective absorption bandwidth (EAB) of 5.20 GHz at 2.0 mm with 15 wt% filler. Detailed investigations reveal that the hollow C/Co/Mo2C-0.4 cubes provide polarization loss, conduction loss, magnetic loss, and optimal impedance matching characteristics, significantly enhancing EM wave absorption performance. This work offers a promising strategy for assembling multiple components into a hollow architecture, offering superior molybdenum carbide microwave absorbers.
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