Journal of Environmental Chemical Engineering
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2021
·
IF 5.909
Mengyang Xu,Xiaoxue Zhao,Haopeng Jiang,Songtao Chen,Pengwei Huo
Converting carbon dioxide into valuable chemicals is seen as a promising strategy for slowing global warming while enriching energy supplies. Photocatalysts derived from Metal-Organic Frameworks (MOFs) can not only overcome the problem of poor stability of MOFs, but also inherit the advantages of MOFs to some extent. Herein, carbon doped In 2 O 3 (C-In 2 O 3 ) hollow tubular is synthesized by calcination of MIL-68(In) as sacrificial template. Then C-In 2 O 3 and g-C 3 N 4 are hydrothermal to obtain C-In 2 O 3 /g-C 3 N 4 heterojunction . The unique hollow tubular structure, carbon doping and type-II heterojunction of C-In 2 O 3 /g-C 3 N 4 expand the light absorption capacity and promote the separation of photogenerated electron-hole pairs, thus significantly improve the activity of photocatalytic reduction of CO 2 . Among them, C-In 2 O 3 /g-C 3 N 4 -5 shows the highest CO 2 reduction activity towards CO (153.42 μmol/g/h) and CH 4 (110.31 μmol/g/h).
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
·
IF 4.939
Qiao Wu,Tianle Li,Wenju Wang,Yupeng Xiao
Oxygen evolution reaction (OER) is a key part of water electrolysis for hydrogen production . Non-noble-metal catalysts with high activity, stability, but low cost are prerequisites for practical application. In this work, sucrose char was synthesized and then chainmail catalysts were produced by in situ growth method, defined as M@C (M = Fe, Co and FeCo). FeCo@C showed great OER performance in both catalytic activity and durability tests. The overpotentials were 302 mV (at the current density of 10 mA cm −2 ) and 423 mV (at 50 mA cm −2 ), with a lowest Tafel slope of 75 mV dec −1 . The electrochemical surface area of catalysts were also analyzed by calculating the capacitance of the double layer to further investigate the catalytic activity. Furthermore, FeCo@C showed superior stability after 30 h test or 10,000 cycles of cyclic voltammetry . Theoretical calculation based on density functional theory (DFT) demonstrated that the overpotential of OER was determined by the Gibbs free energies of reaction intermediates HO∗, O∗ and HOO∗. The adsorption of HO∗ radicals onto the FeCo@C was weaker than Fe@C, which was favorable for reducing the overpotential, as the rate-determining step of the OER process over these catalysts was that HO∗ dehydrogenated to form O∗.
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APPLIED CATALYSIS A-GENERAL
·
2020
·
IF 5.006
Haodong Duan,Xiaolei Xu,Kangwei Leng,Ge Guo,Qing Yu,Xinjin Li,Yuxi Han,Jun Gao,Zhongwei Wang
The characteristics of the reaction for the preparation of dichlorophenylphosphine (DCPP) via benzene and PCl 3 in the presence of AlCl 3 were studied. Some unique characteristics were observed when a catalytic amount of AlCl 3 was used. Namely, more than one mole of DCPP was obtained per mole AlCl 3 , the reaction solution was layered, and DCPP could be directly separated. Our mechanistic study showed that benzene reacted with PCl 3 to form DCPP-AlCl 3 , and DCPP-AlCl 3 dissociated into DCPP and AlCl 3 , continuing to catalyze this reaction. This resulted in the high catalytic efficiency of AlCl 3 . The layering of the reaction solution was caused by the immiscibility of DCPP-AlCl 3 with the raw materials, greatly facilitating the dissociation process of DCPP-AlCl 3 . The formation of diphenylphosphorus chloride (DPC) was due to a continuous Friedel-Crafts reaction between DCPP and benzene. DPC cooperated with AlCl 3 to form the stable coordination compound DPC-AlCl 3 that did not dissociate and was responsible for the deactivation of AlCl 3 .
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ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Jin-Bo Cheng,Hai-Bo Zhao,Min Cao,Meng-En Li,Ai-Ning Zhang,Shu-Liang Li,Yu-Zhong Wang
We describe the design and manufacturing method of a lightweight C-doped MoS2 aerogel with a special regular banana leaflike microstructure used for high-performance microwave absorbers. The aerogel precursor was first fabricated by a self-assembly process between alginate (Alg) and ammonium thiomolybdate (ATM), where Alg as a template was assembled with ATM into regular banana leaflike architectures along the ice growth direction during oriented freezing. After pyrolysis at 900 °C, the C-doped MoS2 aerogels maintained low densities and porous hierarchal banana leaflike structures, where the banana leaves ranged in diameter from about 2 to 5 μm with the growth of small branches. Benefitting from these features, the C-doped MoS2 aerogel possessed excellent microwave absorption performance in the frequency range of 2–18 GHz. The minimum reflection loss (RL) reached −43 dB at 5.4 GHz with a matching thickness of 4 mm, and the effective microwave absorption band (RL < −10 dB) reached 4 GHz (14–18 GHz) at a thickness of 1.5 mm. Our findings also provide strategies for designing MoS2 aerogel nanostructures for electronic devices, catalysis, and other potential applications.
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PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 137
·期 40
·49200
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IF 2.52
Yunxia Zhang,Liqin Cao,Fan Yue,Jide Wang
A clean, sulfonated, highly adsorptive macroporous monolith was constructed using a carbon dioxide-in-water (C/W) high internal phase emulsion template. The random copolymerization of N-hydroxyethyl acrylamide and sodium styrene sulfonate in the water phase was initiated with persulfate. The chemical composition of the novel sulfonated monolith was confirmed by Fourier transform infrared spectroscopy and energy-dispersive X-ray spectroscopy, and the interconnected pore structure was confirmed by scanning electron microscopy (SEM). Results showed that the void sizes were 47–92 μm and that the interconnected pore throats were approximately 10–30 μm. Such a hydrophilic, anionic macroporous material exhibited excellent adsorption properties for cationic dyes. The maximum adsorption capacity of the monolith for methylene blue (MB) and malachite green (MG) reached 1,316 and 2,624 mg/g, respectively, in 500–800 mg/L dye solution at 25°C. Furthermore, the kinetics and thermodynamic parameters of the adsorption process were examined. Experimental data exhibited that adsorption kinetically followed the pseudo-second-order model. The removal rates of MG and MB both exceeded 90% after six regenerations. The adsorption mechanism of the adsorbent was demonstrated preliminarily. The dynamic adsorption operation of MB was conducted in a fixed column, and the breakthrough curve data were fitted using the Thomas and bed depth service time models. All these findings indicated the potential industrial applications of adsorptive sulfonated macroporous monolith.
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BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
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2020
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IF 2.985
Peng Ma,Rongrong Huang,Jingyao Jiang,Yuan Ding,Tingting Li,Yu Ou
C-phycocyanin (C-PC) is a kind of photosynthetically assisted pigment, which is ubiquitous in cyanobacteria cells. We investigated the effect of C-PC on non-alcoholic fatty liver disease (NAFLD) and its mechanism. Through oil red O staining, TC/TG detection, liver SOD/MDA detection and liver H&E staining, we found that C-PC could significantly reduce the lipid accumulation in the steatosis L02 cells and the liver of non-alcoholic steatohepatitis (NASH) mice, and improve the antioxidant capacity of liver. The results of Western Blotting showed that C-PC upregulated the expression of AMPK phosphorylation and downregulated SREBP-1c and its target genes ACC and FAS expression levels. Furthermore, C-PC also upregulated the expression of transcription factor PPARα , which was regulated by AMPK, and its target genes CPT1 level. In addition, C-PC could promote AMPK phosphorylation in hepatocytes while increasing the phosphorylation level of ACC in vivo and in vitro. Besides, C-PC could also improve the liver inflammatory infiltration by upregulated the expression of PPARγ and downregulated the expression of CD36 , IL6 and TNFα . These results indicate that C-PC may improve hepatic lipid accumulation and inflammation in the non-alcoholic fatty liver mice by activating AMPK pathway of hepatocytes. The finding provides important help for the research and development of C-PC in the nutraceuticals and therapeutics of NAFLD.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Jiahao Yu,Jieyi Yu,Tongpan Ying,Xianguo Liu,Xuefeng Zhang,Dandan Han
Three main strategies for designing efficient microwave absorber includes the intrinsic dielectric/magnetic properties, the novel structure and the single atom doping. The Fe-N/C nanocomposites integrate the advantages of above three strategies into one system. In this work, the method for preparing Fe-N/C nanocomposite by calcining the FePc@ZIF-8 precursor under a flowing N 2 gas is described. Fe-N/C nanocomposites, displaying respectable dodecahedron-like morphology, have the merits of strong absorption ability, wide effective absorption bandwidth, thin thickness, and excellent microwave absorption efficiency, which are attributed to the synergistic effect of good electromagnetic loss capacity and proper impedance matching originating from intrinsic dielectric/magnetic properties, the novel structure and the single atoms (Fe and N) doping. Fe-N/C-24 composite delivers an optimal reflection loss of −30.98 dB, an effective absorption bandwidth of 5.04 GHz, the microwave absorption capacity of 87.61 dB GHz the absorption efficiency of 51.53 dB GHz/mm at 1.7 mm.
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NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 46
·21888-21895
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IF 3.591
Hengjie Qin,Ying Lv,Ping Li,Meixia Xiao,Haiyang Song,Qian Zhang,Jialun Yang
A series of Bi2Se3@C materials were prepared through a bismuth metal organic framework (CAU-17) assisted hydrothermal selenization method followed by carbonization, which have been found to be useful as electrode materials for supercapacitor application. The Bi2Se3@C obtained below 500 °C seems to show an excellent specific capacity of 565.9 C g−1 at a current density of 1 A g−1. Furthermore, the performance of Bi2Se3@C in symmetrical supercapacitors (SSCs) is also systemically investigated, and the SSC device achieves a maximum energy density of 39.3 W h kg−1 at a power density of 639.9 W kg−1 and maintains 90.5% of this capacity over 1000 cycles.
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CHEMICAL ENGINEERING JOURNAL
·
2019
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IF 8.355
Fei Wang,Wenlong Zhang,Haihui Zhou,Hong Chen,Zhongyuan Huang,Zhanheng Yan,Rujia Jiang,Chuqing Wang,Zhong Tan,Yafei Kuang
Pyrite (FeS 2 ) is considered to be one of the most promising anode materials for sodium ion batteries (SIBs) due to its high theoretical capacity, natural abundance, low cost and low toxicity, but the commercial process of FeS 2 is always limited by its low conductivity and volume expansion during the charge-discharge process. Herein, a three-dimensional porous composite (FeS 2 -C/RG) is constructed using FeS 2 -C nanoparticles and reduced graphene oxide through one-step vulcanization of PB (Prussian blue)/GO (graphene oxide) gel. As the anode material of SIBs, FeS 2 -C/RG exhibits high electrochemical performance benefiting from the unique three dimensional structure and small FeS 2 -C nanoparticles. The initial specific capacity can reach 1196 mAh g −1 at 0.1 A g −1 and it can still remain 543.0 mAh g −1 after 100 cycles at 0.5 A g −1 . Even at 6 A g −1 , the capacity could maintain 291.7 mAh g −1 after 1000 cycles. The excellent rate and cycling performance of FeS 2 -C/RG indicate it is a promising anode material for rechargeable SIBs.
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IONICS
·
2019
·Vol. 26
·期 2
·579-588
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IF 2.289
Guan Huibin,Zeng Tianbiao,Zhang Chuhong
SnS 2 -based materials are potential anodes of sodium ion batteries (SIBs) due to their high specific capacity, high theoretical coulombic efficiency, and low toxic. Herein, we demonstrate an effectual strategy to improve the integral electrochemical performances of SnS 2 /C by decreasing crystallinity; the Na ions diffuse coefficient, reversible capacity, and rate capacity were increased by a large margin. At 100 mA g −1 , un-milled SnS 2 /C, direct-milled SnS 2 /C, and SnS 2 /C milled with NaCl were delivered about 311, 384, and 509 mAh g −1 at 100th cycle, and at 500 mA g −1 , the capacity vanish ratio in corresponding SnS 2 /C were 0.414%, 0.552%, and 0.292% per cycle from 2nd to 100th cycle. It is expected that the simple synthesize method may provide some inspiration to SnS 2 -based anode research.
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Nano Research
·
2018
·Vol. 12
·期 2
·357-363
·
IF 7.994
Shen Shuiyun,Zhang Yao,Wei Guanghua,Zhang Wansen,Yan Xiaohui,Xia Guofeng,Wu Aiming,Ke Changchun,Zhang Junliang
Undoubtedly, it is imperative to figure out two stubborn issues concerning low electronic conductivity and sluggish lithium ion diffusion to promote the practical application of Li 2 FeSiO 4 materials in lithium-ion battery (LIB) cathode. Herein, we report an innovative and simple strategy that combines a hydrothermal process with subsequent annealing to synthesize highly uniform Li 2 FeSiO 4 /C hollow nanospheres. During the hydrothermal process, polystyrene nanospheres are employed not only as the template but also, more tactfully, as carbon source to form amorphous carbon layers, which will function to enhance the electronic conductivity and restrict particle aggregations. The use of the LIB Li 2 FeSiO 4 /C hollow nanospheres as a LIB cathode delivers a desired stable capacity at each rate stage, and even at a high rate of 10 C, the hollow nanosphere cathode can present a specific discharge capacity as high as 50.5 mAh·g −1 . After 100 cycles, the capacity retentions at 1 and 10 C remain as high as 93% and 72%, respectively. The superior electrochemical performance is believed to be related to special architectures of the Li 2 FeSiO 4 /C hollow nanosphere cathode.
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ANALYTICA CHIMICA ACTA
·
2019
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IF 5.256
Qingui Yang,Na Li,Qiang Li,Shaoqing Chen,Hsing-Lin Wang,Haipeng Yang
Sarcosine is a recently identified biomarker for prostate cancer. However, the rapid detection methods for sarcosine are relatively lack because of the low concentration and the presence of complicated interfering substances in serum or urine. In this manuscript, hollow nanospheres of Fe 3 O 4 was synthesized and used as carrier to disperse Pt (Pt) nanoparticles . In order to achieve excellent electron transfer ability, we use polyaniline to coat Pt–Fe 3 O 4 nanoparticles, and pyrolyze the polyaniline to carbon (C). Thus, hollow magnetic Pt–Fe 3 O 4 @C nanocomposites with good electron transfer ability are formed. The Pt–Fe 3 O 4 @C nanocomposites have high catalytic activity and stability. The nanocomposites were immobilized on glassy carbon electrode (GCE) to construct a nonenzyme hydrogen peroxide (H 2 O 2 ) sensor (Pt–Fe 3 O 4 @C/GCE). We further construct a sensitive sarcosine biosensor by immobilizing sarcosine oxidase (SOx) on the Pt–Fe 3 O 4 @C/GCE. The high catalytic activity and good biocompatibility of Pt–Fe 3 O 4 @C nanocomposites greatly retained the bioactivity of immobilized SOx, and the prepared sarcosine biosensor has good electrocatalytic performance towards sarcosine. It has a linear detection range between 0.5 and 60 μM with a limit of detection (LOD) of 0.43 μM (the signal to noise ratio is 3), and the sensitivity is 3.45 nA μM −1 (48.8 nA μM −1 cm −2 ), which has the potential to be used for rapid screening of prostate cancer.
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高影响因子
危险品化学品经营许可证（带存储）