Bioresource Technology Reports
·
2021
·
IF 0
Jean Damascene Harindintwali,Jianli Zhou,Ildephonse Habimana,Xuetian Dong,Chixiang Sun,Marknoah Chinenye Nwamba,Wenhua Yang,Xiaobin Yu
In the present study, a new thermo-adaptive cellulolytic nitrogen-fixing bacterial strain designated as Klebsiella sp. C-3, which could degrade cellulose and hemicellulose in rice straw (RS) without an added nitrogen source, was isolated from paddy soil. The highest activities of enzymes (FPase, 0.92 IU/mL, and Xylanase , 17.1 IU/mL) produced by Klebsiella sp. C-3 were recorded at 37 °C. In RS hydrolysate , the % of the total nitrogen content increased from 0.65% to 3.7% after 7-day fermentation with Klebsiella sp. C-3. The main reducing sugar products of RS hydrolysate were glucose, xylose , and cellobiose . Unexpectedly, Klebsiella sp. C-3 had much lower water loss (30%) than the control group (61.85%) and other bacterial isolates at 45 °C after a 7-day incubation period. Hence, Klebsiella sp. C-3 could provide a feasible pathway to manage lignocellulosic biomass in soil and improve water retention in thermophilic biological processes and arid soils .
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DOI
ChemElectroChem
·
2018
·Vol. 5
·期 22
·3498-3505
·
IF 4.446
Su Nie,Li Liu,Min Li,Junfang Liu,Jing Xia,Yue Zhang,Xianyou Wang
Graphical The unique structure of these one-dimensional nanofibers with two-dimensional nanosheets on the surface is successfully synthesized. Large specific surface area can greatly shorten the diffusion routes for both electrons and ions. Besides, the carbon matrix can dramatically improve the overall conductivity. As a result, the anode exhibits excellent electrochemical capability for sodium-ion batteries. Na 2 Ti 3 O 7 /C nanofibers are successfully synthesized through an electrospinning process followed by hydrothermal treatment. The unique structure of these one-dimensional nanofibers with two-dimensional nanosheets on the surface is presumed to significantly shorten the diffusion routes for both electrons and ions. Meanwhile, the carbon matrix with a certain degree of graphitization can dramatically improve the overall conductivity. As a result, the Na 2 Ti 3 O 7 /C nanofiber electrode reveals an impressive electrochemical capability as the anode material of sodium-ion batteries. It demonstrates a reversible capacity of 110 mA h g −1 after 500 cycles at a rate of 1 C. Moreover, with almost no capacity degradation, the discharge capacity of the Na 2 Ti 3 O 7 /C nanofiber electrode remains at 58 mA h g −1 after 1500 cycles at the high rate of 50 C. This superior electrochemical performance places the Na 2 Ti 3 O 7 /C nanofibers as an anode material with great promise for sodium-ion batteries that could be applied in large-scale energy storage.
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DOI
高影响因子
SOLID STATE IONICS
·
2018
·
IF 2.751
Zhen Jiang,Lu Liu,Yuehua Li,Jing Zhu,Chuanchang Li,Zhangxing He,Wei Meng,Yingqiao Jiang,Lei Dai,Ling Wang
NaTi 2 (PO 4 ) 3 /C (NC) composites decorated by carbon nanotubes (CNTs) were prepared via a sol-gel way, and employed as anode in aqueous lithium ion batteries . An effective conductive network was obtained by decoration of CNTs, which can interconnect NC particles. CNTs decoration has no obvious effect on lattice structure for NaTi 2 (PO 4 ) 3 , and can enhance electrochemical properties for NC. Moreover, NC decorated by CNTs with optimal content of 8.8% (NC-CNTs-10) exhibits the highest electrochemical properties. NC-CNTs-10 delivers the discharge capacity of 96.4, 93.7, and 74.2 mAh g −1 at 0.5, 3, and 15C, respectively, with increase of 2.7, 15.1, and 38.2 mAh g −1 compared with NC. In addition, NC-CNTs-10 shows excellent cycling performance. Capacity retention for NC-CNTs-10 can reach 91.2% after 1000 cycles at a rate of 4C, 16.7% larger than that of pristine NC. Our study reveals that CNTs decoration is a simple way to raise electrochemical properties for NaTi 2 (PO 4 ) 3 /C in aqueous lithium ion batteries .
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DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-13
·
IF 14.7
Li Min,Zhou Yang,Wen Zexing,Ni Qian,Zhou Ziqin,Liu Yiling,Zhou Qiang,Jia Zongchao,Guo Bin,Ma Yuanhong,Chen Bo,Zhang Zhi-Min,Wang Jian-bo
Despite the broad potential applications of C -glycosides, facile synthetic methods remain scarce. Transforming glycosyltransferases with promiscuous or natural O -specific chemoselectivity to C -glycosyltransferases is challenging. Here, we employ rational directed evolution of the glycosyltransferase MiCGT to generate MiCGT-QDP and MiCGT-ATD mutants which either enhance C- glycosylation or switch to O -glycosylation, respectively. Structural analysis and computational simulations reveal that substrate binding mode govern C -/ O -glycosylation selectivity. Notably, directed evolution and mechanism analysis pinpoint the crucial residues dictating the binding mode, enabling the rational design of four enzymes with superior non-inherent chemoselectivity, despite limited sequence homology. Moreover, our best mutants undergo testing with 34 substrates, demonstrating superb chemoselectivities, regioselectivities, and activities. Remarkably, three C -glycosides and an O -glycoside are produced on a gram scale, demonstrating practical utility. This work establishes a highly selective platform for diverse glycosides, and offers a practical strategy for creating various types of glycosylation platforms to access pharmaceutically and medicinally interesting products.
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DOI
PubMed
高影响因子
Energy Technology
·
2022
·Vol. 10
·期 4
·2101024
·
IF 4.149
Zihao Xu,Jinrui Ye,Youya Pan,Kai Liu,Xiaofang Liu,Jianglan Shui
Sodium-ion battery (SIB) is regarded as the next generation of large-scale energy storage systems, but it still faces problems such as low energy density, severe expansion/contraction of electrode volume, and poor cycle performance. Herein, necklace-like Sn-MOF@PAN fibers are prepared by the electrospinning method and then carbonized into Sn-C necklace paper as the binder-free cathode in an SIB. In each bead, Sn nanoparticles are wrapped by a porous carbon shell. The morphology and composition of the necklace-shaped Sn@C nanofibers are optimized by adjusting the ratio of Sn-MOF/PAN in the precursor. Sn@C with the optimal composition has a high specific capacity of 207 mAh g −1 even at a high current density of 2 A g −1 and maintains a specific capacity of 327 mAh g −1 after 100 cycles at a current density of 100 mA g −1 . This research provides a high-performance flexible electrode for SIBs.
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DOI
高影响因子
Industrial Chemistry & Materials
·
2024
·
IF 0
Jiayao Cui,Junyong Min,Hao Wang,Jianglan Shui,Lishan Peng,Zhenye Kang,Jieyuan Liu,Qingjun Chen,Shuo Bai,Yanrong Liu
Developing single-atom Fe–N4/C catalysts is crucial for the large-scale implementation of proton exchange membrane fuel cells (PEMFCs). While Fe–N4/C catalysts are inherently active in accelerating the slow ORR process, their performance is still inferior to that of Pt/C. Herein, a trace Co-doped Fe single-atom catalyst (Fe(tCo)–N–C) containing more active Fe2N8 sites has been synthesized. Interestingly, compared with typical FeN4 sites in an Fe–N–C electrocatalyst, the Fe2N8 sites generate a larger Fe–N bond length due to Co-doping. The elongated Fe–N bond in Fe2N8 lowers the d-band center and charge density of iron sites, enhancing the ORR process by facilitating the formation of *OOH and generation and desorption of *OH. Fe(tCo)–N–C manifested excellent acidic and alkaline ORR activity, with a half-wave potential (E1/2) of 0.80 V in HClO4 solution and 0.89 V in KOH medium. More importantly, high peak power densities (Pmax) were realized by applying Fe(tCo)–N–C in PEMFCs, with the Pmax reaching 890 mW cm−2 in H2–O2 and 380 mW cm−2 in H2–air. Additionally, trace Co dopants in the catalyst improved carbon graphitization and provided high ORR catalytic stability. This research introduces an innovative approach to engineering highly active Fe2N8 sites, providing valuable insights for the sustainable progress of PEMFC technology.
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DOI
ACS Applied Nano Materials
·
2024
·
IF 5.3
Hao Gu,Yi Jiang,Xijia Yang,Yue Yang,Xuesong Li,Liying Wang,Wei Lü
Flexible and wearable pressure sensors have attracted significant attention due to their wide range of potential applications. However, they often suffer from low sensitivity, narrow pressure detection range, and poor mechanical flexibility. In this work, a multifunctional 3D pressure sensor based on a ternary metal oxide@carbon-based sponge (C–NiCoZn–O/CMF) was developed by the hydrothermal method. The pressure feedback layer of the sensor was uniformly coated with C–NiCoZn–O on the surface of the framework, which improved the device’s conductivity, sensitivity, and stability significantly. The sensitivities of 41.99, 23.39, and 11.19 kPa–1 are in the ranges 0–4.01, 4.01–8.39, and 8.39–20.1 kPa, respectively, and the cyclic retention rate exceeded 90% after 2000 cycles. The C–NiCoZn–O/CMF composite demonstrated excellent electrochemical performance as an electrode for supercapacitors, with a high specific capacity of 2030 mF/cm2 at a current density of 1 mA/cm2 and a high capacity retention rate of 81.55% after 4000 cycles. As a multifunctional device, when integrated with a microprocessor, it can easily detect and process a large amount of human physiological signal data in daily work scenarios. Present composites maintain adjustable conductivity and extremely high elasticity even under extreme conditions such as liquid nitrogen and high temperatures up to 85.6 °C. This work is expected to play a great role in polar exploration, volcano survey, deep space exploration, etc.
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DOI
高影响因子
RARE METALS
·
2024
·Vol. 43
·期 5
·2067-2079
·
IF 9.6
Wang Dan,Ma Qun,He Huan,Wang Zhi-Yuan,Zheng Run-Guo,Sun Hong-Yu,Liu Yan-Guo,Liu Chun-Li
Antimony-based materials with high capacities and moderate potentials are promising anodes for lithium-/sodium-ion batteries. However, their tremendous volume expansion and inferior conductivity lead to poor structural stability and sluggish reaction kinetics. Herein, a double-confined nanoheterostructure Sb/Sb 2 S 3 @Ti 3 C 2 T x @C has been fabricated through a solvothermal method followed by low-temperature heat treatment. The dual protection of “MXene” and “carbon” can better accommodate the volume expansion of Sb/Sb 2 S 3 . The strong covalent bond (Ti–S, Ti–O–Sb, C–O–Sb) can firmly integrate Sb-based material with Ti 3 C 2 T x and carbon, which significantly improves the structure stability. In addition, the carbon layer can restrain the oxidation of MXenes, and the nano-Sb/Sb 2 S 3 can facilitate electron/ion transport and suppress the restacking of MXenes. The heterogeneous interface between Sb and Sb 2 S 3 can further promote interfacial charge transfer. The MXene-Sb/Sb 2 S 3 @C-1 with the optimal Sb content shows high specific capacities, comparable rate properties and ultra-stable cycling performances (250 mAh·g −1 after 2500 cycles at 1 A·g −1 for sodium-ion batteries). Ex situ X-ray diffractometer (XRD) test reveals the storage mechanism including the conversion and alloying process of MXene-Sb/Sb 2 S 3 @C-1. Cyclic voltammetry (CV) test results demonstrate that the pseudocapacitance behavior is dominant in MXene-Sb/Sb 2 S 3 @C-1, especially at large current. This design paves the way for exploring high-performance alloy-based/conversion-type anode for energy storage devices. Graphical abstract
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DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2016
·Vol. 21
·期 1
·125-131
·
IF 2.327
Ren Yurong,Lu Peng,Huang Xiaobing,Ding Jianning,Wang Haiyan
Li 2 ZnTi 3 O 8 /C nanocomposite has been synthesized using phenolic resin as carbon source in this work. The structure, morphology, and electrochemical properties of the as-prepared Li 2 ZnTi 3 O 8 samples were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), Raman spectroscopy (RS), galvanostatic charge–discharge, and AC impedance spectroscopy. SEM images show that Li 2 ZnTi 3 O 8 /C was agglomerated with a primary particle size of ca. 40 nm. TEM images reveal that a homogeneous carbon layer (ca. 5 nm) formed on the surface of Li 2 ZnTi 3 O 8 particles which is favorable to improve the electronic conductivity and inhibit the growth of Li 2 ZnTi 3 O 8 during annealing process. The as-prepared Li 2 ZnTi 3 O 8 /C composite with 6.0 wt.% carbon exhibited a high initial discharge capacity of 425 and 159 mAh g −1 at 0.05 and 5 A g −1 , respectively. At a high current density of 1 A g −1 , 95.5 % of its initial value is obtained after 100 cycles.
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 7
·期 2
·394-401
·
IF 5.934
Yushan Luo,Mengli Tao,Jianhua Deng,Renming Zhan,Bingshu Guo,Qianru Ma,Muhammad Kashif Aslam,Yuruo Qi,Maowen Xu
K-ion batteries (KIBs) are considered as one of the most promising devices for large-scale energy storage because of the comparable output voltage with lithium-ion batteries and the abundant reserves of potassium. FeS2 is regarded as a kind of very important anode material for KIBs due to its low cost and high capacity. However, the poor electronic conductivity and huge volume expansion of FeS2 during the discharge/charge process strongly inhibit the K-storage performance. To solve these problems, herein, unique core–shell FeS2@C nanocubes with nanoparticles in the interior and carbon shells in the exterior are designed. The inside FeS2 nanoparticles are beneficial for K+ diffusion and the penetration of the electrolyte, while the outside carbon shells can enhance the electronic conductivity and suppress the volume expansion. The unique core–shell structure displays outstanding K-storage performance with impressive specific capacity, excellent cycling stability, and superior rate capability with 73% capacity retention at 2 A g−1. This work not only provides solutions to obtain a superior anode material for KIBs but also offers insights into designing a hierarchical structure for energy storage systems.
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DOI
高影响因子
Nano Research
·
2024
·Vol. 17
·期 6
·5031-5039
·
IF 9.5
Li Wenxiang,Gao Shuo,Yang Chuanruo,Yang Juntao,Nisar Amjad,Xiang Guolei,Jin Junsu
In 2 O 3 is an effective electrocatalyst to convert CO 2 to formic acid (HCOOH), but its inherent poor electrical conductivity limits the efficient charge transfer during the reaction. Additionally, the tendency of In 2 O 3 particles to agglomerate during synthesis further limits the exposure of active sites. Here we address these issues by leveraging the template effect of graphene oxide and employing InBDC as a self-sacrificing template for the pyrolysis synthesis of In 2 O 3 @C. The resulting In 2 O 3 @C/rGO-600 material features In 2 O 3 @C nanocubes uniformly anchored on a support of reduced graphene oxide (rGO), significantly enhancing the active sites exposure. The conductive rGO network facilitates charge transfer during electrocatalysis, and the presence of oxygen vacancies generated during pyrolysis, combined with the strong electron-donating ability of rGO, enhances the adsorption and activation of CO 2 . In performance evaluation, In 2 O 3 @C/rGO-600 exhibits a remarkable HCOOH Faradaic efficiency exceeding 94.0% over a broad potential window of −0.7 to −1.0 V (vs. reversible hydrogen electrode (RHE)), with the highest value of 97.9% at −0.9 V (vs. RHE) in a H-cell. Moreover, the material demonstrates an excellent cathodic energy efficiency of 71.6% at −0.7 V (vs. RHE). The study underscores the efficacy of uniformly anchoring metal oxide nanoparticles onto rGO for enhancing the electrocatalytic CO 2 reduction performance of materials.
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DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2023
·
IF 4
Wang Yao,Jiaojiao Zhao,Qiang Li,Chujie Yu,Xuli Ding
The development of high-performance anode material for sodium-ion batteries remains a challenge because of their low capacity, which limits their commercial application. Compared with carbon-based materials, metallic Sb and SnO-based anodes have received extensive attention because of their high theoretical specific capacity and safe working potential. The main problem faced is the serious volume expansion during charging and discharging, leading to irreversible loss of capacity and poor cycle life. In this paper, Sb/SnO@C composite material with adjustable ratio of Sb/SnO was prepared via electrospinning by encapsulating Sb and SnO particles in lantern-like carbon nanocages which connected through the nanofibers . The unique structure can not only effectively mitigate the volume changes during the cycle, but also provide multiple effective paths for ion and electron transport . The kinetic analysis is further performed with the assist of CV and EIS . The results show that the prepared composite can provide impressive Na + ions storage and transport performance, and can still deliver a reversible charging capacity of 413mAhg −1 after 200 cycles at a current density of 50mAg −1 , with a capacity retention ratio of 84%. This work provides a new strategy for the development of sodium ion batteries with high capacity and stable cycle performance.
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DOI
高影响因子
危险品化学品经营许可证（带存储）