CRYSTAL GROWTH & DESIGN
·
2016
·
IF 4.425
Zhensheng Hong,Kaiqiang Zhou,Junwen Zhang,Zhigao Huang,Mingdeng Wei
With the aim of enhancing the electrochemical kinetics and capacity of the TiO2 electrode for Na ion batteries (NIBs), we have designed a hybrid material of carbon-coated TiO2 mesocrystals anchored on reduced graphene oxide (TiO2@C-rGO). Such hybrid nanostructures are fabricated through a facile one-step route including in situ growth of oriented self-assembly of TiO2 mesocrystals on GO. TiO2@C-rGO possesses a very large surface area (279 m2 g–1), mesoporous nature, and single-crystal-like structure. It is also found that the capacity of TiO2 electrode for NIBs could be improved by carbon coating at a low current rate, but pure TiO2 shows better rate performance than that of TiO2@C. Remarkably, the enhanced electrochemical kinetics and large capacity can be simultaneously achieved by designing hybrid material. The hybrid nanostructures exhibit a highly reversible capacity of 300 mAh g–1 at 100 mA g–1, superior rate capability, and long-term cycling stability (a stable capacity of 159 mAh g–1 can be maintained after 1000 cycles at 1 A g–1). The superior Na ion storage of TiO2@C-rGO is largely ascribed to the robust architecture of well-dispersed carbon-coated mesoporous TiO2 mesocrystals anchored on conductive graphene network, leading to enhanced electrochemical kinetics and offering enough active sites for the Na ion to locate.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Miaomiao Cao,Wanbao Wu,Ruitian Guo,Yihong Liang,Guangxing Pan,Hao Wu,Xiangli Liu,Jiaheng Zhang
The construction of carbon-encapsulated transition metal nanotube structures is a preferred method that can effectively slow down volume expansion, improve cycling stability and enhance the electrical conductivity of the reactive sites of lithium-ion batteries. In this study, nanotubes of carbon-coated NiCo-NiCo 2 O 4 nanoparticles (NC-NCO@C) were prepared by a one-step molten salt method at high temperature using Ni and Co as catalytic centers and sodium acetate as carbon source. We used NC-NCO@C-2 nanotubes as anode materials for lithium-ion batteries(LIBs), which exhibited excellent lithium storage performance and good stability, with a specific capacity of 616.26 mAh g −1 after 1000 cycles at a high current density of 1 A g −1 . In addition, NC-NCO@C-2 were used as anodes in lithium-ion full cells and LiFePO 4 (LFP) was used as the cathode. The NC-NCO@C-2//LFP full-cell exhibits high capacity and good cycling stability, with a capacity of 100.7 mAh g −1 after 100 cycles and a capacity retention rate of 92%. The construction of NC, NCO, and carbon ternary complexes was found to activate and promote the reversible conversion of certain inorganic components at the solid electrolyte interfaces (SEI), which effectively reduced the volume change during cycling, increased the electrical conductivity, and improved the cycling stability of the electrode. The proposed one-step molten salt synthesis of Carbon-coated metals complexes with excellent compatibility characteristics, is expected to solve the problem of volume change in transition metals, which is encountered in LIBs applications.
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高影响因子
INORGANIC CHEMISTRY
·
2019
·
IF 4.85
Shikang Yin,Jinze Li,Linlin Sun,Xin Li,Dong Shen,Xianghai Song,Pengwei Huo,Huiqin Wang,Yongsheng Yan
Photocatalytic reduction of CO2 by semiconductors is of great significance in generating value-added fuels. Here, we construct a novel S–C–S heterojunction constituted of MoS2/SnS2/r-GO by a simple solvothermal method. The prepared MoS2/SnS2/r-GO showed significant photoexcitation of photosensitive oxygen (ROS) by electron spin resonance spectroscopy, demonstrating that superoxide radicals (•O2–), pores, and hydroxyl radicals (•OH) are the main active species. The constructed S–C–S heterojunction has a multilevel electron transport mechanism and synergistic effect, which provides the possibility of producing more organic fuel. The photocatalytic materials were characterized by XRD, XPS, SEM, TEM, PL, etc. As a result, the atomic layer MoS2/SnS2/r-GO heterojunction exhibited a CO formation rate of 68.53 μmol g–1 h–1 and a CH4 formation rate of 50.55 μmol g–1 h–1, respectively. This work opens up new prospects for the formation of heterojunctions of chalcogenide transition-metal sulfides.
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Ya Yang,Yulian Li,Peidong Hong,Zijian Wu,Chao Xie,Kaisheng Zhang,Li Lianxiang,Junyong He,Lingtao Kong,Jinhuai Liu
Developing highly-effective catalysts through a facile method for activating peroxymonosulfate (PMS) to degrade recalcitrant pollutants is highly desirable. In this work, porous carbon-coated iron-manganese oxides (MnFeO@C) was facilely synthesized. The porous carbon film on the surface of MnFeO@C was beneficial to adsorption of bisphenol A (BPA) and flow of electrons. The catalytic degradation performance toward BPA was significantly improved with the increase of surface roughness and porosity of MnFeO@C after calcination. In particular, MnFeO@C derived at 300 °C (MnFeO@C-300) exhibited the highest degradation rate benefiting from the existence of Mn 2 O 3 . More than 95% BPA could be removed in 30 min by MnFeO@C-300/PMS system and remained efficient in a wide pH range from 3.0 to 10.0, especially in alkaline conditions. The intermediates of BPA degradation were identified and the degradation pathways involved hydroxyl oxidation and benzene ring-opening were proposed based on GC–MS results. The removal rate of BPA can maintain more than 80% following five cycles. Thus, the as-prepared MnFeO@C-300 composites are available to serve as efficient and eco-friendly catalysts for advanced catalytic oxidation of recalcitrant pollutants.
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Nanoscale
·
2020
·Vol. 12
·期 27
·14642-14650
·
IF 6.895
Longfei Han,Junling Wang,Xiaowei Mu,Can Liao,Wei Cai,Zhixin Zhao,Yongchun Kan,Weiyi Xing,Yuan Hu
Red phosphorus (P) is considered to be the most suitable electrode for sodium-ion batteries due to its low cost, earth abundance and high theoretical capacity. Numerous studies have focused on improving the low conductivity and the extremely large volume change of red P during the cycling process. However, these strategies heavily decrease the P mass loading in the electrode. Herein, inspired by natural wood, we successfully develop an ultra-thick bulk red Phosphorus@Carbon-Wood (red P@C-Wood) electrode via the vaporization-condensation process. The sodium-ion batteries assembled with the fabricated red P@C-Wood electrode provide a high areal capacity of 18 mA h cm−2 (≈5 times those of other reported electrodes) and the P mass loading of up to 8.4 mg cm−2 (≥2 times those of other reported electrodes). The combination of red phosphorus and carbonized wood provides a new strategy for people to improve the areal energy density of lithium and sodium batteries.
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高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2016
·Vol. 18
·期 11
·1-13
·
IF 2.101
Hou Yanhui,Wang Yechen,Yuan Huili,Chen Hang,Chen Guowei,Shen Junhai,Li Liangchao
Heterogeneous photo-Fenton SiO 2 /Fe 3 O 4 /C@TiO 2 (SFCT) catalyst with a core-multishell structure and a diameter of about 550 nm was successfully prepared and was characterized by scanning electron microscopy (SEM), TEM, XRD, Raman, and Fourier transform infrared (FT-IR). The results illustrated that anatase TiO 2 coexisted with rutile TiO 2 , in which the anatase phase was the main crystal phase. In addition, the catalytic activity of SFCT catalyst had been evaluated in the catalytic degradation on p-nitrophenol (PNP). The influence factors on the PNP degradation, including SFCT component ratio ( m
SFC / m
TiO2 ), H 2 O 2 dosage, solution pH, and PNP concentration, had been investigated. And the contrast experiments about the photo-Fenton catalytic mechanism revealed that the SFCT-2 catalyst possessed a superior activity in the neutral environment due to the optimal activity matching between Fe 3 O 4 and TiO 2 , and it exhibited the stable catalytic performance after five successive recycles. Therefore, the SFCT-2 catalyst had a promising application for the photo-Fenton degradation of organic contaminant.
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高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2014
·Vol. 30
·期 1
·150-156
·
IF 0.886
YANG Bing-Jian,WANG Hong,Li Lei,HUANG Bo-Wen,LIAO Xiao-Zhen,HE Yu-Shi,MA Zi-Feng
The development of low-cost and effective electrocatalysts for air electrodes is critical for practical applications of lithium/oxygen batteries. In the present work, phenanthroline (phen) was used as a ligand to prepare a Co(phen)2 complex. The Co(phen)2 complex
was coated on BP2000 and then heat treated at 600, 700, 800, and 900 , to obtain carbon-supported Co-N (Co-N/C) catalysts. The catalytic activities in oxygen reduction reaction/oxygen evolution reaction (ORR/OER) of the prepared catalysts were measured and compared with those of a typical
carbon-supported cobalt tetramethoxyphenylporphyrin (CoTMPP/C) catalyst. The influence of the calcination temperature on the composition and structure of the Co-N/C catalysts was investigated. Electrochemical tests showed that the Co-N/C catalysts prepared at 700 and 800 gave better performances,
comparable to that of the CoTMPP/C catalyst. The superior electrochemical performance of the prepared Co-N/C catalysts and the low cost of the phenanthroline chelating agent make Co-N/C a promising cheap catalyst for lithium/oxygen batteries.
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高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 15
·7145-7157
·
IF 11.301
Jinling Xue,Yinshi Li,Jue Hu
It remains a major challenge to develop a facile method to prepare non-noble metal electrocatalysts with high activity and durability to drive the sluggish oxygen reduction reaction (ORR) for proton exchange membrane fuel cells (PEMFCs). Herein, a highly efficient bimetallic Zn/Fe@N-doped hierarchical porous carbon (Zn/Fe–N–C) catalyst derived from ZIF-8 and hemin (host–guest) was firstly reported by one-step thermal treatment. Fe2+ spatially separated by using the hemin guest in the ZIF-8 framework and hydrocarbon-branched chains form rich Fe–Nx active sites, and the evaporation of Zn2+ generates a highly porous structure in the Zn/Fe–N–C catalysts. Benefitting from this unique structure and composition, the resulting Zn/Fe2–N–C catalyst exhibits excellent ORR activities in both 0.1 M KOH (onset potential, Eonset = 1.08 V, and half-wave potential, E1/2 = 0.86 V vs. RHE) and 0.5 M H2SO4 media (Eonset = 1.04 V and E1/2 = 0.81 V), which are even comparable to those of the commercial Pt/C catalyst, and ranks among the top reported electrocatalysts. In addition, it also has outstanding long-term durability and good methanol resistance, much better than those of Pt/C in both acidic and alkaline media, which makes it one of the best non-noble alternatives of Pt-based catalysts for ORR electrocatalysis. This work highlights the potential to rationally design and fabricate high-performance ORR catalysts for fuel cell applications.
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Nanoscale
·
2019
·Vol. 11
·期 41
·19506-19511
·
IF 6.97
Ying Li,Tong Liu,Wenxiu Yang,Zhijun Zhu,Yanling Zhai,Wenling Gu,Chengzhou Zhu
Non-Pt catalysts with excellent performance regarding the oxygen reduction reaction (ORR) have aroused enormous interest in recent years. Herein, we propose a dual-template method to synthesize a multiscale porous Fe–N–C (FeNC) catalyst. SiO2 and Zn are used as co-templates to produce a multiscale porous structure. Chitosan and glutaraldehyde are used as building blocks to fabricate the frameworks of the hydrogel. After lyophilization and annealing treatments, FeNC aerogel with a multiscale porous structure could be obtained. The as-prepared FeNC catalyst annealed at 900 °C (FeNC-900) exhibits a larger electrochemically active surface area and an improved ORR activity compared to FeNC annealed at other temperatures. FeNC-900 shows a superior ORR performance in comparison with that of commercial Pt/C in terms of the onset potential and half-wave potential, i.e., 0.959 and 0.837 V, which are 28 mV and 10 mV higher than those of Pt/C, respectively. Multiscale porosity is responsible for the outstanding ORR performance of FeNC-900. The electron transfer number of FeNC-900 for the ORR was calculated to be 3.95, which is comparable with that of Pt/C. In addition, the FeNC-900 catalyst possesses an excellent long-term duration and anti-poisoning capacity against methanol crossover. All these results endow the FeNC catalyst with tremendous potential for use in fuel cells.
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高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Pengcheng Zhang,Yi Feng,Mengjue Cao,Jianfeng Yao
Co 9 S 8 nanoparticles (NPs) anchored on carbonized melamine foam with polydopamine derived carbon coating (CMF-Co 9 S 8 -C) was successfully constructed for advanced lithium-ion battery anode. The sandwich-type structure consists of massive Co 9 S 8 NPs and dual N-doped carbon layers that not only accommodate the volume expansion effect but also shortens the transfer distance of Li + / e − . Moreover, the nanocomposite inherits 3D carbon network with hierarchical porous structure, which is beneficial for providing sufficient transport channels and contacting with electrolyte. With the prominent synergistic effects from structure and chemical properties, CMF-Co 9 S 8 -C hybrid compound exhibited high specific capacity of 645 mAh g − 1 at 0.5 A g − 1 after 200 cycles, and it delivered excellent cycling stability (520 mAh g − 1 ) under a high current (2 A g − 1 ) after 1000 cycles.
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2025
·
IF 3.8
Si Mengyao,Han Guo,Liu Tianwen,Wang Xiaoying
Aberrant overexpression of c-Myc protein (c-Myc) serves as a critical biomarker for aggressive lymphomas, yet its trace-level quantification remains challenging due to insufficient sensitivity in conventional assays. Here, we present an electrochemical immunosensor leveraging homogeneous gold–palladium (AuPd) nanohybrids for dual amplification, achieving both simplified fabrication and enhanced analytical performance. A chitosan–graphene oxide–AuPd nanorod composite (CS-GO-AuPd) was engineered as an electrode modifier, offering high conductivity, biocompatibility, and abundant antibody immobilization sites. Prussian blue-doped AuPd nanoparticles (PB-AuPd@Ab 2 ) were simultaneously designed as catalytic signal probes, synergistically amplifying responses through electron mediation and nanozyme activity. This homogeneous material strategy eliminated heterogeneous nanomaterial interfaces, streamlining sensor assembly while ensuring signal reproducibility. The sandwich-type immunocomplex formation triggered a PB-derived differential pulse voltammetry signal proportional to c-Myc concentration, yielding a 0.5 pg mL −1 –1 ng mL −1 linear range, with a detection limit of 0.25 pg mL −1 . Comparative validation against clinical methods confirmed robust accuracy, highlighting the platform’s potential for dynamic monitoring of lymphoma progression and therapy response. This work establishes a paradigm for unifying material homogeneity with dual-amplification mechanisms in biosensing, extensible to diverse low-abundance biomarkers. Graphical
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高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Hongwei Zhou,Ying Lin,Yongzhen Ma,Zhao Meng,Keyuan Cheng,Haibo Yang
Multi-component design for constructing heterogeneous interfaces has emerged as a key strategy to optimize electromagnetic wave (EMW) absorption. However, precise structural control during heterogeneous interface construction remains a significant challenge. In this study, CNFs@Co/C fibers with tunable cavity size were prepared by coaxial electrospinning and heat treatment. Abundant heterogeneous interfaces between CNFs and metallic Co particles significantly enhance interfacial polarization. The impedance matching of CNFs@Co/C fibers can be effectively tuned by regulating the cavity size. Optimized impedance matching helps more EMWs enter the material and be lost. The results demonstrate that CNFs@Co/C fibers with an appropriate cavity size exhibit outstanding EMW absorption capabilities, attaining a maximum reflection loss of −56.63 dB and an effective absorption bandwidth of 7.84 GHz. Furthermore, the radar stealth performance of the samples was assessed through simulations conducted under far-field conditions. The radar cross section (RCS) value of CNFs@Co/C-2 is less than -10 dB m2 over the entire test range, and the maximum RCS attenuation at θ = 0° could reach 24.09 dB m2. This study provides essential guidance for the development and production of lightweight materials featuring a hollow structure for advanced EMW absorption applications.
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