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Van der Waals Forces between S and P Ions at the coP-c@MoS2/c Heterointerface with Enhanced Lithium/Sodium Storage

ADVANcED FUNcTIONAL MATERIALS 2023年第35期33卷 2302830-2302830页

作者： Xia, Yongji Yang, Tianlun Wang, Zhenjia Mao, Tianle Hong, Zheyu Han, Jiajia Peng, Dong-Liang Yue, Guanghui Xiamen Univ Coll Mat Fujian Key Lab Surface & Interface Engn High Perfo State Key Lab Phys Chem Solid Surface Xiamen 361005 Peoples R China

Metal-organic framework-derived metal phosphides with high capacity, facile synthesis, and morphology-controlled are considered as potential anodes for lithium/sodium-ion batteries. However, the severe volume expansion during cycling can cause the electrode material to collapse and reduce the cycle life. Here, novel coP-c@MoS2/c nanocube composites are synthesized by vapor-phase phosphating and hydrothermal process. As the anode of LIBs, coP-c@MoS2/c exhibits outstanding long-cycle performance of 369 mAh g(-1) at 10 A g(-1) after 2000 cycles. In SIBs, the composite also displays excellent rate capability of 234 mAh g(-1) at 5 A g(-1) and an ultra-high the capacity retention rate of 90.16% at 1 A g(-1) after 1000 cycles. Through density functional theory, it is found that the S ions and P ions at the interface formed by coP and MoS2 can serve as Na+/Li+ diffusion channels with an action of van der Waals force, have attractive characteristics such as high ion adsorption energy, low expansion rate and fast diffusion kinetics compared with MoS2. This study provides enlightenment for the reasonable design and development of lithium/sodium storage anode materials composited with MOF-derived metal phosphides and metal sulfides.

关键词： coP-c@MoS2 c heterointerfaces lithium sodium storage van der Waals forces

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Local anti-ablation modification of uneven-density c/c composites with the Zrc-Sic composite ceramics

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MATERIALS cHARAcTERIZATION 2023年第1期198卷

作者： Zhong, Lei Guo, Lingjun Li, Yunyu Wang, chuanyun Northwestern Polytech Univ Shaanxi Key Lab Fiber Reinforced Light Composite M State Key Lab Solidificat Proc Xian 710072 Peoples R China

To lower the cost and preparation period of c/c-Zrc-Sic composites, the uneven-density c/c composites (with a high density in the inner region and low density in the surface region) are designed and prepared by thermal gradient cVI process, followed by local modification of Zrc-Sic composite ceramics by precursor infiltration -pyrolysis (PIP) mothed to improve the anti-ablation performance. The ablation tests show that the Sic con-tents have a great influence on the microstructure of ZrO2 grains at the ablation center by adjusting the ablation temperature and the melting point of ZrO2 grains. Results prove that about 20 wt% Sic is optimum for the Zrc-Sic composite ceramics to perform best during the ablation and modify the uneven c/c composites prepared in this work. Besides, the dense c/c matrix would stop the liquid ZrO2-SiO2 phase from running off, and in return, the dense ZrO2-SiO2 phase would sink into the surface within the ablated region, which could protect the carbon fibers of the surface region and the dense c/c matrix beneath.

关键词： Uneven -density c c composite Local anti -ablation modification c c-Zrc-Sic TGcVI Ablation

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Addition of crop Residues with Different c:N Ratios on the Release Pattern of Available Nitrogen and Sulfur in Different Soils

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cOMMUNIcATIONS IN SOIL ScIENcE AND PLANT ANALYSIS 2021年第22期52卷 2912-2920页

作者： Singh, Sreejan Sharma, P. K. Singh, Surendra Kumar, Arvind Banaras Hindu Univ Inst Agr Sci Dept Soil Sci & Agr Chem Varanasi 221005 Uttar Pradesh India

Mineralization of organic N and S of crop residue is an important useful tool for forecasting availability of N and S in soils. Three different soils (Vertisol, Inceptisol and Alfisol) from eastern Uttar Pradesh, India;seven crops residue, four cereals (rice, barley, maize, wheat) from irrigated area of Varanasi;and three pulses (gram lentil, pigeon pea) from rainfed area of Mirzapur were used in 90-day incubation study under controlled condition to estimate the release of soil available N and S. The experiment was laid out in a factorial completely randomized design with three replications. Total Nitrogen (N) and total Sulfur (S) contents were higher in the pulses than that of cereals. Pulses residue with the lowest c:N:S ratio (177.0:3.7:1 to 195.8:4.5:1) had significantly rapid rate of N and S release up to 45 days and then declined at 60 and 90 days. On the other hand, cereals with the highest c:N:S ratio (390.8:4.3:1 to 463.6:5.0:1) had slow release of N and S up to 45 days and then rapid released at 60 and 90 days. Among pulses residue, pigeon pea has resulted significantly higher net release of soil available N and S at day 45 to the extent of 18.4 and 78.7% in Alfisol, 17.7 and 51.2% in Inceptisol, and 15.0 and 24.1% in Vertisol, respectively, over control. Among the cereals residue, barley residue amended Alfisol had higher net increase in available N at day 90 (13.2%) followed by Inceptisol (10.8%) and Vertisol (9.9%) over control.

关键词： crops residue mineralization nitrogen sulfur c N ratio soil types

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Wastewater treatment performance and gaseous emissions in MFc-cWs affected by influent c/N ratios

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cHEMIcAL ENGINEERING JOURNAL 2023年第1期461卷

作者： Niu, Tingting Zhu, Hui Shutes, Brian Yu, Jing He, chunguang Hou, Shengnan cui, Hu Yan, Baixing Chinese Acad Sci Northeast Inst Geog & Agroecol Key Lab Wetland Ecol & Environm Changchun 130102 Peoples R China Northeast Normal Univ Changchun 130117 Peoples R China Middlesex Univ Dept Nat Sci London NW4 4BT England

constructed wetlands with microbial fuel cells (MFc-cWs) are widely acknowledged to be efficient in pollutant removal, and have been reported to be beneficial in reducing specific gaseous emissions. However, as a critical parameter that directly addresses, the behavior of carbon (c) and nitrogen (N), the impact of the influent c/N ratio on the comprehensive performance of MFc-cWs remains unknown. Herein, the impact of c/N ratios (i.e., 1, 5, 10, 15) on pollutants (cOD, symbolscript NO3--N, NO2--N, TN and TP) removal, multiple gaseous (cO2, cH4, N2O and NH3) emissions and electricity generation of MFc-cWs were evaluated, and the internal mechanisms were explored. Increasing the c/N ratio enhanced cOD removal, and the MFc-cWs achieved superior symbolscript TN, and TP removal efficiencies at c/N ratios of 5 and 10. The higher c/N ratio was generally accompanied by greater cO2, cH4, and NH3 fluxes. Nevertheless, the lowest global warming potential (GWP) was observed at c/N of 5 due to the lowest N2O flux having been obtained. The functional gene analysis results showed that the decrease in N2O flux was attributed to an increase in the nosZ/(nirS symbolscript nirK) ratio, and the cH4 flux was regulated by the abundance of pomA and mcrA genes. The highest power density (152.54 mA/m3) and current intensity (649.03 mW/m3) were also observed in MFc-cWs with a c/N ratio of 5, mainly due to the increase in electrogenic bacteria (e.g., Proteobacteria and Firmicutes). consequently, the influent c/N ratio of 5 was optimal for treating wastewater and generating electricity efficiently, and also attenuating the corresponding GWP in MFc-cWs.

关键词： MFc-cWs c N ratio Greenhouse gas emission Ammonia volatilization Functional gene

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Superior Proton-Transfer catalytic Promiscuity of cytochrome c in Self-Organized Media

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cHEMBIOcHEM 2021年第7期22卷 1285-1291页

作者： Rani, Sheetal Dasgupta, Basundhara Bhati, Gaurav Kumar Tomar, Kalpana Rakshit, Sabyasachi Maiti, Subhabrata Indian Inst Sci Educ & Res IISER Dept Chem Sci Mohali Knowledge City 140306 Manauli India

Evolutionarily elderly proteins commonly feature greater catalytic promiscuity. cytochrome c is among the first set of proteins in evolution to have known prospects in electron transport and peroxidative properties. Here, we report that cyt c is also a proficient proton-transfer catalyst and enhances the Kemp elimination (KE;model reaction to show proton transfer catalytic property) by similar to 750-fold on self-organized systems like micelles and vesicles. The self-organized systems mimic the mitochondrial environment in vitro for cyt c. Using an array of biophysical and biochemical mutational assays, both acid-base and redox mechanistic pathways have been explored. The histidine moiety close to hemin group (His18) is mainly responsible for proton abstraction to promote the concerted E2 pathway for KE catalysis when cyt c is in its oxidized form;this has also been confirmed by a H18A mutant of cyt c. However, the redox pathway is predominant under reducing conditions in the presence of dithiothreitol over the pH range 6-7.4. Interestingly, we found almost 750-fold enhanced KE catalysis by cyt c compared to aqueous buffer. Overall, in addition to providing mechanistic insights, the data reveal an unprecedented catalytic property of cyt c that could be of high importance in an evolutionary perspective considering its role in delineating the phylogenic tree and also towards generating programmable designer biocatalysts.

关键词： biocatalytic promiscuity cytochrome c Kemp elimination membrane-mimetic system protein unfolding

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Synergistic effect on the improved lithium ion storage performance in the porous Fe2O3@Fe3c@c composite

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MATERIALS RESEARcH BULLETIN 2023年第1期164卷

作者： Ge, Yixin Gao, Weixing Yuan, Zhengqiu Tao, Shi Kong, Fanjun Qian, Bin Changshu Inst Technol Sch Elect & Informat Engn Changshu 215500 Peoples R China Soochow Univ Sch Phys Sci & Technol Suzhou 215006 Peoples R China Far East Holding Grp Co Ltd Yixing 214200 Peoples R China

The porous Fe2O3@Fe3c@c composite was synthesized by a simple two-step thermal treatment and its structure, morphology, lithium ion storage performance and diffusion kinetics were discussed. Benefitting from the high theoretical capacity of Fe2O3 and fast kinetics of Fe3c, the Fe2O3@Fe3c@c composite exhibits a stable cycling capacity of 800.3 mAh g-1 after 100 cycles at 0.1 A g-1 with superior rate capability. The cV and in-situ EIS analysis results reveal that the Fe2O3@Fe3c@c composite has reversible redox reaction, stable solid electrolyte interphase films and low charge transfer resistance during the discharging and charging process. In addition, the lithium ion diffusion coefficients of the Fe2O3@Fe3c@c composite at different voltage states are investigated by GITT measurement. This work can provide an effective strategy for synthesis of metal oxide@metal carbide composite for lithium-ion batteries.

关键词： A microporous materials c impedance spectroscopy D electrochemical properties energy storage

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ZnO/c nanocomposite grafted molecularly imprinted polymers as photoelectrochemical sensing interface for ultrasensitive and selective detection of chloramphenicol

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ScIENcE OF THE TOTAL ENVIRONMENT 2023年第Part1期859卷 160284页

作者： Zhang, Huafang Kang, Zewen Zhu, Hu Lin, Hetong Yang, Da-Peng Fujian Agr & Forestry Univ Coll Food Sci Fuzhou 350002 Fujian Peoples R China Quanzhou Normal Univ Coll Chem Engn & Mat Sci Key Lab Chem Mat & Green Nanotechnol Quanzhou 362000 Fujian Peoples R China Fujian Normal Univ Sch Chem & Mat Sci 32 Shangsan Rd Fuzhou 350007 Peoples R China Univ Hlth & Rehabil Sci Sch Rehabil Sci & Engn Qingdao 266024 Peoples R China

Nanomaterials-based photoelectrochemical (PEc) detection is becoming a rapidly-developing analytical technique in chemical and biological assays due to its unique advantages of easy miniaturization, high sensitivity, and rapid turn-around time. Herein, a molecularly imprinted polymer-assisted PEc sensor based on ZnO/c nanocomposite was suc-cessfully fabricated for the highly sensitive and selective determination of chloramphenicol (cAP). Benefiting from the hydrophilic functional groups (-OH,-cOOH) and large surface area of bio-templated ZnO/c nanocomposite, the tight grafting of MIP with excellent recognition ability on substrate is easier and more stable than traditional PEc sensor, thus significantly increasing the performance. Under optimal conditions, the PEc sensor exhibited significant cAP de-tection performance in the range of 0.01-5000 ng mL-1 with a detection LOD of 5.08 pg mL-1(S/N = 3) and success-fully applied to the detection of cAP in milk sample. Our results show that ZnO/c nanocomposite and MIP can act as an efficient photo-responsible matrix to fabricate PEc sensor, providing important application potentials for pollutants control in food and environment.

关键词： PEc sensor chloramphenicol ZnO c Molecularly imprinted polymer

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In-gel SOD assay reveals SOD-2 is the single active, water-soluble SOD enzyme in c. elegans

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FREE RADIcAL RESEARcH 2021年第6期55卷 619-624页

作者： Fernando, Lourds M. Adeel, Silwat Abul Basar, Mohammed Allen, Anna K. Duttaroy, Atanu Howard Univ Dept Biol 415 Coll St NW Washington DC 20059 USA St Jude Childrens Res Hosp 332 N Lauderdale St Memphis TN 38105 USA Natl Inst Dent & Craniofacial Res Stem Cell Biochem Unit NIH Bethesda MD USA

The nematode c. elegans has a contingent of five sod genes, one of the largest among aerobic organisms. Earlier studies revealed each of the five sod genes is capable of making perfectly active SOD proteins in heterologous expression systems therefore none appears to be a pseudogene. Yet deletion of the entire contingent of sod genes fails to impose any effect on the survival of c. elegans except these animals appear more sensitive to extraneously applied oxidative stress conditions. We asked how many of the five sod genes are actually making active SOD enzymes in c. elegans through the usage of in-gel SOD activity analysis and by using KcN as a selective inhibitor against cu-ZnSOD enzyme(s). Here we provide evidence that out of the five SOD proteins only the mitochondrial SOD is active in the water-soluble fraction of c. elegans extracts albeit at an apparently much lower activity than the multiple active SODs in D. melanogaster and E. coli. We had no opportunity to test the activity of Sod-4a isoform which is possibly a membrane-bound form of SOD. The mutant analysis further confirmed that among the two mitochondrial SOD proteins, SOD-2 is the only naturally active SOD in c. elegans.

关键词： SOD c elegans free radicals superoxide oxidative stress mitochondria

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Mechanical reinforcement and UV ageing resistance of SiO2/c hybrid on poly(butylene adipate-co-terephthalate) film

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MATERIALS LETTERS 2023年第1期342卷

作者： Sun, Xiaoyan Wang, Ke Li, Fayong Xie, Dong Guangdong Acad Sci Inst Biol & Med Engn Guangzhou Peoples R China Guangdong Biomat Engn Technol Res Ctr Guangzhou Peoples R China

The hollow SiO2/c hybrid was prepared through a combined soft-templated sol-gel approach and calcination method, and applied in poly(butylene adipate-co-terephthalate) (PBAT) film. The initial elongation at breaks and tensile strength of the PBAT film loaded 4phr SiO2/c hybrid were increased by 34% and 71%, respectively, compared to that containing naked SiO2. The combination of carbon with SiO2 mainly facilitated the homoge-nous dispersion and better substantial interfacial adhesion in PBAT matrix. Furthermore, a release experiment of the SiO2/c/1130 showed that a small amount of [3-[3-(2H-Benzotriazol-2-yl)-5-(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropyl]-hydroxypoly(oxo-1,2-ethanediyl) (UV1130) was absorbed by the SiO2/c hybrid, which could furtherly improve the dispersion of hybrid in PBAT matrix and UV resistance. The work provides a promising method to reinforce PBAT composites and prepare UV-resistant PBAT films simultaneously.

关键词： Polymers Interfaces SiO2 c Reinforcements composite materials

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Investigation of hydrogen superoxide adsorption during ORR on Pt/c catalyst in acidic solution for PEFc by in-situ high energy resolution XAFS

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JOURNAL OF POWER SOURcES 2023年第1期557卷

作者： Yamamoto, Naoki Matsumura, Daiju Hagihara, Yuto Tanaka, Kei Hasegawa, Yuta Ishii, Kenji Tanaka, Hirohisa Kwansei Gakuin Univ Grad Sch Sci & Technol Dept Nanotechnol Sustainable Energy 1 Gakuen Uegahara Sanda Hyogo 6691330 Japan Japan Atom Energy Agcy Mat Sci Res Ctr 1 1 1 Kouto Sayo Hyogo 6795148 Japan Kwansei Gakuin Univ Sch Sci & Technol Dept Nanotechnol Sustainable Energy 1 Gakuen Uegahara Sanda Hyogo 6691330 Japan Natl Inst Quantum Sci & Technol Quantum Beam Sci Res Directorate 1 1 1 Kouto Sayo Hyogo 6795148 Japan

Oxygen Reduction Reaction (ORR) is one of the key electrochemical reactions, especially in Polymer Electrolyte Fuel cells (PEFcs). In this work, the reaction pathway and intermediate species such as molecular-type oxygen during ORR were discussed. High energy resolution X-ray absorption fine structure spectra at the Pt L3-edge were obtained to observe the electronic structure of Pt catalyst. carbon-supported Pt nanoparticles as powder catalysts were used for measurement as more realistic conditions, and the species adsorbed on the Pt nanoparticles were analyzed while controlling under the potentials in acidic electrolyte solution with N2 or O2 gas bubbling. Molecular-type oxygen adsorption species is observed only in the O2-bubbled electrolyte solution. This intermediate adsorption species is assigned to a hydrogen superoxide.

关键词： ORR Pt c Hydrogen superoxide Hydroperoxyl radical Acidic solution High energy resolution XAFS HERFD-XAS

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