JOURNAL OF MOLECULAR LIQUIDS
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2020
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IF 5.065
Lili Ren,Dongyang Zhou,Jingjing Wang,Tao Zhang,Yinxian Peng,Guoguang Chen
The selection and preparation of materials is very important for the green treatment of wastewater. In our study, MnO 2 nanosheets were in-situ grown on biomass carbon microspheres (BCM) to format flower-like MnO 2 @carbon microspheres (CMn) adsorption composites. Amoxicillin (AMX) was adopted as model pollutant, and its adsorption was investigated as function of the contact time, AMX concentration, adsorbent dosage, and pH. The highest adsorption capacity of CMn was 16.094 mg/g in neutral medium. The adsorption isotherms were fitted using the Langmuir model. The kinetics of AMX adsorption was determined to follow the pseudo-first-order model. Recycle experiments indicated that CMn exhibited high adsorption efficiency (>80%) after four cycles. Therefore, the as-prepared CMn can be a promising material for removing pollutants form wastewater in the future.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
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2014
·Vol. 29
·期 10
·1153-1161
·
IF 1.815
Lin Chen,Longfei Li,Weifeng Liu,Yongzhen Yang,Xuguang Liu
A novel thermosensitive core/shell microgel with carbon microspheres (CMSs) cores was prepared by three steps. First, oxidized-carbon microspheres were obtained by mixed-acid oxidization. Second, the silane agent of 3-(trimethoxysilyl)-propyl methacrylate was used to functionalize the oxidized-carbon microspheres so as to generate the vinyl groups on the microspheres. Thereafter, the as-synthesized particles were used as seeds in the precipitation polymerization of N-isopropylacrylamide to introduce a thermosensitive polymer microgel shell onto the surfaces of the silanized-CMSs in the presence of an initiator and a crosslinker. The morphology and thermosensitive properties of the composite microspheres were characterized by field emission scanning electron microscopy, transmission electron microscopy, Fourier transformation infrared spectroscopy, thermogravimetry, and dynamic light scattering. Results indicate that the thickness of polymer layer could be adjusted by the crosslinking agent's concentration. The composite microgels had a low critical solution temperature at about 30 °C and exhibited strong thermosensitivity. The controlled release of a drug molecule (a model drug, acetosalicylic acid) was also investigated.
研究领域:
材料科学
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生物医药
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
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2021
·
IF 9.676
Ming-Xin Song,Li-Jing Xie,Jia-Yao Cheng,Zong-Lin Yi,Ge Song,Xiao-Yang Jia,Jing-Peng Chen,Quan-Gui Guo,Cheng-Meng Chen
Starch, as a typical polysaccharide with natural spherical morphology, is not only a preferred precursor for preparing carbon materials but also a model polymer for investigating thermochemical evolution mechanisms. However, starch usually suffers from severe foaming and low carbon yield during direct pyrolysis. Herein, we report a simple and eco-friendly dry strategy, by maleic anhydride initiating the esterification of starch, to design carbon microspheres against the starch foaming. Moreover, the influence of ester grafting on the pyrolytic behavior of starch is also focused. The formation of ester groups in precursor guarantees the structural stability of starch-based intermediate because it can promote the accumulation of unsaturated species and accelerate the water elimination during pyrolysis. Meanwhile, the esterification and dehydration reactions greatly deplete the primary hydroxyl groups in the starch molecules and thus the rapid levoglucosan release is inhibited, which well keeps the spherical morphology of starch and ensures the high carbon yield. In further exploration as anode materials for Lithium-ion batteries, the obtained carbon microspheres exhibit good cyclability and rate performance with a reversible capacity of 444 mAh g −1 at 50 mA g −1 . This work provides theoretical fundamentals for the controllable thermal transformation of biomass towards wide applications.
研究领域:
材料科学
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能源科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
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2024
·
IF 3.5
Yaning Zhang,Shiyuan Fan,Siqi Gong,Huibin Liu,Huiting Xu,Junjie Qi,Honghai Wang,Chunli Li,Wenchao Peng,Jiapeng Liu
Capacitive deionization (CDI) has attracted significant attention as a water treatment technology owing to its low cost, high efficiency, and eco-friendliness. However, the unsatisfactory desalination performance of traditional electrode materials hinders the development of CDI. Herein, 1T-MoS 2 /C hybrid microspheres are successfully fabricated through confinement and phase engineering strategies. The confinement effect of porous hollow carbon microspheres reduces the overgrowth and agglomeration of MoS 2 nanosheets, which is beneficial for exposing more active sites and enhancing stability. Meanwhile, the 1T phase MoS 2 displays high intrinsic conductivity and large interlayer spacing, which is conducive to rapid insertion/extraction of Na + . Consequently, 1T-MoS 2 /C hybrid becomes a prospect electrode material for CDI, which showcases outstanding desalination capacity (48.1 mg/g at 1.2 V), eminent desalination rate as well as exceptional stability. Moreover, the desalination mechanisms are clarified through various characterizations and density functional theory calculations. This study provides new perspectives on designing high-performance MoS 2 -based CDI electrode materials.
研究领域:
材料科学
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环境科学
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水处理技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2021
·
IF 4.464
Yingying Sheng,Yifu Zhu,María Luisa Cerón,Yufu Yi,Peng Liu,Peng Wang,Ting Xue,María Belén Camarada,Yangping Wen
Nanozyme based on the silver nanoparticles (AgNPs) decorated highly water-oxygen stable phosphorene (BP) nanohybrid with phosphorus-doped porous carbon microspheres (P-PCMs) is applied as an intelligent sensing platform for the electrochemical detection of 8-hydroxy-2′-deoxyguanosine (8-OHdG) as a biomarker of oxidative DNA damage in human urine sample. The density functional theory (DFT) is use for investigating the effect of silver on the conductivity level of BP and discussing a possible mechanism for the electrocatalytic oxidation of 8-OHdG. The Ag + is in-situ reduced as AgNPs that grows onto the BP surface for the controllable preparation of BP-AgNPs with effective surface passivation among different metal ions decorated BP. P-PCMs with 4.9-fold enhancement in specific surface area (1636.73 m 2 g −1 ) are prepared by hydrothermal carbonization of α-cyclodextrin as carbon sources, then calcinate in the presence of phosphoric acid as an activator and dopant. P-PCMs-BP-AgNPs are prepared by the ultrasound-assisted liquid-phase exfoliation with the addition of Ag + , and both P-PCMs and black phosphorus crystals are sufficiently grinded. The P-PCMs-BP-AgNPs nanohybrid displays good long-term water-oxygen stability, extraordinary specific surface area, superior electrocatalytic capacity with 303-fold enhancement, enzyme-like characteristics with I max of 100 μA and K m of 29 μM. The machine learning (ML) model with artificial neural network (ANN) algorithm is employed for the intelligent output of 8-OHdG in real sample with acceptable recovery in work range from 0.2 to 125 μM.
研究领域:
生物医学工程
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2020
·Vol. 56
·期 3
·2212-2225
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IF 3.553
Guo Yue,Sun Qiaozhi,Song Kai,Ding Jiawei,Shi Chunsheng,He Fang
With the aim to obtain microwave (MW) absorber possessing simultaneous light weight and broad absorption bandwidth, FeCo imbedded 3D porous carbon network microspheres (3DC@FeCo) were synthesized via spray-drying followed by calcination processes. 3DC@FeCo exhibits 3D porous carbon microspheres structure with submicrometer-sized macropores. The FeCo imbedded carbon structure not only restrains the growth and agglomeration of FeCo nanoparticles, but also effectively introduces polarization and suppresses the skin effect from FeCo. In addition, the 3D porous carbon microspheres provide more channels which enhance the multiple reflection for microwave. The microwave absorption performance of 3DC@FeCo can be adjusted through changing the carbonization temperature, and the sample after carbonized at 630 °C (3DC@FeCo-630) shows the best microwave absorption property. It is worth mentioning that there is only 21.8 wt% FeCo in 3DC@FeCo, indicating that the 3DC@FeCo microspheres proposed in this study are one kind of lightweight microwave absorbers. The minimum reflection loss (RL) value of 3DC@FeCo-630 is − 47.4 dB at 6.35 GHz and the effective absorption bandwidth (RL < − 10 dB) can reach up 5.66 GHz (12.08–17.74 GHz) with the matching thickness of only 2.7 mm. The excellent microwave absorption ability can be attributed to favorable impedance matching, strong dielectric loss, magnetic loss, FeCo imbedded carbon and unique 3D porous structure. 3DC@FeCo microspheres as broadband and lightweight microwave absorbers exhibit a promising prospect applied in complex electromagnetic environments.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Chunxia Yan,Jie Guan,Zhimao Li,Fangyue Cheng,Ziqiang Shao
Due to the growing demand for clean and renewable energy, the effective utilization of renewable resources in energy storage and has been concerned. And high specific capacitance and stable electrochemistry for energy storage devices are challenging to develop. Learning from unique structure of goniastrea coral, we design to construct three-dimensional layered conductive electrodes material made of MoS 2 @chitosan carbon spheres (MNCCS) composite. The NiCoLDH nanosheets construct on the surface of conductive chitosan carbon spheres to effectively form open permeable channels and rich conductive networks, improves the efficient energy storage and electrochemical stability. MoS 2 is strongly coupled with NiCoLDH nanosheets through heterointerface, which resembles tentacles on the surface of coral, exposing more active sites to efficiently trap ions. Besides, the obtained material possesses favorable heterojunction interface and defects, which provide sufficient available electroactive sites and numerous storage charge area. Hence, The MNCCS presents an outstanding specific capacitance of 2605.9 F g −1 at 1 A g −1 . Notably, a supercapacitor fitted with MNCCS electrode and CCS electrode achieves high specific capacitance (234.4 F g −1 at 1 A g −1 ), the maximum energy density of 77.0W h kg −1 at highest power density of 667.4W kg −1 , along with the excellent cycling stability of 90.8% retention over 10,000 cycles. This work provides a new perspective for fabricating high-performance and stable supercapacitors electrode material for clean energy storage.
研究领域:
材料科学
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能源存储
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
WASTE MANAGEMENT
·
2020
·
IF 5.448
Xiaoyun Li,Xuebin Lu,Min Liang,Rui Xu,Zhihao Yu,Bingyu Duan,Lefu Lu,Chuanling Si
Catalytic conversion of xylose and the hemicellulose fraction of waste biomass to furfural is important for the valorization of waste lignocellulose. Here, a clean and efficient catalytic system consisting of sulfonated carbon microspheres catalysts and γ-valerolactone was developed for the upgrading of xylose and waste lignocellulose to the furfural in one-pot. Sulfonated carbon microspheres (C Co S) with Brønsted and Lewis acid sites were prepared to yield furfural. The mesoporous structures were facilitated by introduction of Co element in xylose hydrothermal process, and the density of Brønsted acid sites were improved by the sulfonation. The furfural yield from xylose reached 75.12% using C Co S as catalyst at 170 °C for 30 min in a γ-valerolactone/water (17/3 v/v) solvent. As typical Brønsted acid, the SO 3 H groups on the surface of C Co S catalyst is essential for catalytic dehydration xylose to furfural. Additionally, the mesoporous structures of C Co S improved the mass transfer in the furfural production process. The catalytic system was applied in the conversion of real biomass (including corncob, corn straw and Eucalyptus sawdust) to evaluate the possibility of application. These three biomass species all reached excellent furfural yields, which were more than 70%. This work provided a catalytic strategy for effective conversion of xylose and biomass to furfural.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Shuai Dai,Chang Sun,Yuhe Zhang,Lingzhi Zeng,Yiqiong Peng,Liyuan Zhou,Yanlong Wang,Jian Jiang,Chang Ming Li
Practical utilization of Li-sulfur batteries (LSBs) is still hindered by the sulfur cathode side due to its inferior electrical conductivity , huge volume expansion and adverse polysulfide shuttling effects. Though using polar catalysts coupled with mesoporous carbons may well surmount these barriers, such unsheltered catalysts rarely survive due to oversaturated polysulfide adsorption and extra sulfuration side reactions. To overcome above constrains, we herein propose to implant highly reactive nanocatalysts into carbon matrix with few nanometers insertion depth for mechanical protection. As a paradigm study, we have embedded La 2 O 3 -quantum dots (QDs) into carbon nanorods , which are then assembled into carbon microspheres (CMs). As evaluated, La 2 O 3 QDs-CMs can help elevate the cathode redox reaction kinetics and sulfur utilization ratios, delivering a large capacity of 1392 mAh g −1 at 0.25C and high-capacity retention of 76% after total cycling. The thin carbon layers on La 2 O 3 QDs exert a key role in impeding excess polysulfide accumulation on catalysts and thus prevent their deactivation/failure. Our strategy may guide a smart way to make catalysts-involved sulfur cathode systems with ultra-long working durability for LSBs applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhuocheng Xie,Jialin Bai,Xiumin Yao,Xuejian Liu,Hanning Xiao
Mesocarbon microbeads (MCMB) have significant potential for enhancing the dry friction performance of SiC. However, the weak bonding between MCMB and SiC leads to a high wear rate in MCMB-SiC composites. This study addressed this issue by in situ formation of a SiC shell on the MCMB surface using the molten salt templating (MSS) method, followed by preparing MCMB@SiC-SiC composites through hot-pressing sintering. The in-situ SiC shell created a strong chemical bond between the MCMB and SiC, improving the interaction between the phases. Comprehensive investigations into the effects of the MCMB@SiC content on the microstructure, mechanical properties, dry friction, and wear performance revealed that the MCMB@SiC-SiC composites exhibited excellent dry friction performance, with a coefficient of 0.24 and a wear rate of 6.6 × 10 −7 mm 3 N −1 m −1 . Compared with the MCMB-SiC composites without the shell structure, the MCMB@SiC-SiC composites exhibited a 36 % reduction in the dry friction coefficient (μ) and an 81 % reduction in the wear rate (WR). The SiC shell structure effectively prevented MCMB extraction and SiC spalling, making this innovative design a promising solution for enhancing the performance of SiC as a sealing material under severe conditions.
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Feize Li,Dongmei Li,Xiaolong Li,Jiali Liao,Shoujian Li,Jijun Yang,Yuanyou Yang,Jun Tang,Ning Liu
Saccharomyces cerevisiae , a typical industrial microorganism , was employed as a precursor to directly synthesize carbon microspheres. After a low temperature hydrothermal treatment (180 °C, 12 h), the microbial cells were successively transferred to carbon microspheres that had a diameter of 3–5 μm. The Hummers method was used to chemically modify the hydrothermal carbon materials to obtain functional materials for uranium removal. The characterizations and analysis showed that the morphology of the hydrothermal carbon was partially destroyed after functionalized activation, and abundant oxygen-containing groups were introduced onto the material surface. The results of the sorption behavior showed that the uranium (U) sorption capacity of the modified sorbent reached up to 183.4 mg g −1 , which was an improvement of approximately 4.6 times relative to the raw carbon materials. The thermodynamic and kinetic parameters demonstrated the removal process to be spontaneous, endothermic and pseudo-second-order chemisorption. The selective sorption of U(VI) from the simulated nuclear effluent at different pH values suggested that the sorbent displayed a desirable selectivity for the U(VI) ions over the other 11 competitive cations.
研究领域:
环境科学
·
微生物学
·
材料科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Jiangtao Liu,Shaohui Zhang,Baosheng Liu,Xuning Feng,Zhenbo Wang
A supercapacitor electrode material was synthesized by using hollow carbon spheres prepared via high temperature sintering of dopamine hydrochloride and subsequent coating with MnO 2 . SEM, TEM and analysis of energy pattern were used to characterize the structure, morphology and elemental composition of the material, which proved that the material had a good hollow structure and uniform surface morphology , and that MnO 2 was successfully coated on the surface of the carbon material. Electrochemical characterization using charge-discharge cycles at constant current and other methods show that the prepared materials have good specific capacitance and cycle stability, and have a specific capacitance of 198 F.g −1 at a current of 1 A·g −1 . When the charge and discharge cycle is carried out at 10 A·g −1 for 5000 cycles, the capacitance remains stable at more than 180 F·g −1 .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）