Nanoscale
·
2020
·Vol. 12
·期 48
·24394-24402
·
IF 6.895
Yuhan Liu,Malin Li,Yingying Zheng,Hezhe Lin,Ziyang Wang,Wen Xin,Chunzhong Wang,Fei Du
Potassium-ion batteries (PIBs) are considered a promising alternative to lithium-ion batteries (LIBs) for next-generation energy storage due to the abundance and competitive cost of potassium resources. However, the excavation and the development of proper electrodes for PIBs are still confronted with great challenges. Herein, a self-assembled bismuth sulfide microsphere wrapped with reduced graphene oxide was fabricated to form a heterostructured Bi2S3@RGO composite via a visible-light-assisted method and served as the anode for PIBs. The as-prepared Bi2S3@RGO composite presented a high reversible specific capacity of 538 mA h g−1 at 0.2 A g−1 and superior rate capability of 237 mA h g−1 at a high current density of 2 A g−1 after 300 cycles. In particular, the high capacity could be ascribed to the synergistic effect of the conversion and alloying reactions during the electrochemical processes, which was validated by ex situ X-ray diffraction. The fabrication of a unique heterostructure combining the self-assembled Bi2S3 microspheres and flexible RGO boosted the facile charge transfer, leading to the enhanced cyclic stability and rate performance.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Yi-Ran Li,Ying-Ming Li,Bing-Bing Chen,Wen-Juan Hu,De-Yi Wang
Ideal electromagnetic absorbing material should not only be light weight, broadband and high efficient, but also easily prepared and flame-retarding to satisfy the challenges from rapid development of electronic information technology. In present paper, a new type of electromagnetic absorbent (Fe-MOF-rGO) was prepared via a simple one-pot method to grow metal-organic framework (Fe-MOF) on the surface of in-situ reduced graphene oxide (rGO) by solvothermal method. When 25 wt% of Fe-MOF-rGO was incorporated into the paraffin matrix, the minimum reflection loss value (RL) reached to −43.6 dB at the thickness of 2 mm, and the effective absorption bandwidth (EAB) exceeded 5.0 GHz, which satisfied the goals of high efficiency, light weight and broadband. According the medium permittivity loss, magnetization loss and excellent resistance matching results, it was concluded that the conduction loss (excellent conductivity of rGO), magnetic loss (magnetic resonance of Fe nanoparticles) and interface polarization loss (heterostructure of two-dimensional rGO and three-dimensional Fe-MOF) of Fe-MOF-rGO jointly determined the electromagnetic absorbing performance. Moreover, the combustible behavior of Fe-MOF-rGO was also investigated. When 10 wt% of Fe-MOF-rGO was incorporated into the epoxy resin (EP), the heat release capacity (HRC) and peak heat release rate (PHRR) decreased by 42.1% and 42.3% respectively, which showed an excellent flame-retarding property.
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 31
·期 5
·1164-1171
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IF 2.578
Mengmeng Song,Meng Zhou,Hengfeng Hu,Heqing Fu
First, attapulgite-Fe 3 O 4 magnetic filler (ATP-Fe 3 O 4 ) was prepared by using a chemical precipitation method. Subsequently, graphite oxide (GO) was prepared through Hummer method, and then reduced GO (RGO) was prepared through GO reduced by chitosan (CS). Finally, a series of WPU-RGO/ATP-Fe 3 O 4 /CS composites were prepared by introduced RGO/ATP-Fe 3 O 4 /CS to waterborne polyurethane. The structure and properties were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR), X-ray diffraction (XRD), vibrating sample magnetometry (VSM), thermogravimetric analysis TGA, conductivity test, and tensile test. The experimental results indicated that thermal stability and tensile strength of nanocomposites were improved with the increase of the content of RGO/ATP-Fe 3 O 4 /CS. Meanwhile, with the increase of the RGO/ATP-Fe 3 O 4 /CS content, the electrical and magnetic properties of WPU-RGO/ATP-Fe 3 O 4 /CS composites were improved. When the content of RGO/ATP-Fe 3 O 4 /CS was 8 wt%, the electrical conductivity and the saturation magnetic strength of WPU-RGO/ATP-Fe 3 O 4 /CS composites were 3.1 × 10 −7 S·cm −1 and 1.38 emu/g, respectively. WPU-RGO/ATP-Fe 3 O 4 /CS composites have excellent electrical and magnetic properties.
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MATERIALS RESEARCH BULLETIN
·
2020
·
IF 4.019
Waqar Uddin,Sajid ur Rehman,Muhammad Adnan Aslam,Shafiq ur Rehman,Mingzai Wu,Manzhou Zhu
Impedance matching has a key role in strong microwave absorption. To achieve the perfect impedance matching and enhanced interface dielectric relaxation, nickel-doped rGO@MoS 2 composite has been prepared. The complex permittivity and complex permeability of rGO@Ni-MoS 2 show significant improvement by the combination of the high magnetocrystalline anisotropy of Ni metal with highly conductive reduced graphene oxide, leading to remarkable microwave absorption. The prepared rGO@Ni-MoS 2 achieved maximum microwave absorption of −40 dB at 2 mm thickness. The control samples of MoS 2 , Ni-MoS 2 and rGO@MoS 2 indicate that micro-cluster of MoS 2 and Ni doping is indeed helpful to improve the performance of rGO@Ni-MoS 2 . The study provides a pathway for practical applications of microwave absorption materials in terms of impedance matching.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 15
·e55221
·
IF 2.7
You Zhang,Wenzhong Ma,Jing Zhong,Ruiqiao Jiang,Zhou Zhou,Sirui Lu,Shuo Wang
As an efficient method to realize photoinduced shape memory, photothermal filler has the characteristics of economy and convenience. However, the aggregation of the photothermal filler in the matrix material will reduce the material's shape memory and mechanical properties. In this work, the photothermal filler of reduced graphene oxide (rGO)-titanium dioxide (TiO 2 ) was prepared by the solvothermal method and then introduced into the polycaprolactone (PCL) matrices to construct a photoresponsive actuator. Because of TiO 2 is uniformly loaded on the rGO surface, rGO-TiO 2 disperses well in the composites. When the GO:TiO 2 ratio of photothermal filler is 1:1, the mechanical properties of PCL-GT-3 are the best, and the tensile strength and elongation at break are 31.8 MPa and 239.5%, respectively, and the crosslinking material under near-infrared light has a good photothermal effect. Due to the induced difference between the in-plane stress of the surface and the volume layer, the shape transformation can be controlled by very low energy (808 nm, 700 mW near-infrared laser). The scheme of controlling the properties of the photoinduced shape memory material by changing only the filler type is conducive to commercial application.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
·
IF 9.221
Jie Hu,Wangwang Guan,Xueqing Xiong,Yong Chen,Haizhu Long
A carbon nanomaterials-modified MOF-derived Co 3 O 4 p–p heterojunction was successfully constructed using a solution-combination-calcination method. The morphological and structural characteristics and their gas sensing performances were comprehensively investigated. Particularly, the synergistic effect between different carbon nanomaterials and Co 3 O 4 mesoporous structures was carefully studied. The gas sensing results revealed that the sensor based on the CNT-rGO-Co 3 O 4 nanocomposites exhibited better gas sensing properties toward the ethanol gas, including higher response, admirable antihumidity, and shorter response–recovery time than the other Co 3 O 4 samples. The gas sensitivity of CNT-rGO-Co 3 O 4 nanocomposites reached to be as high as 127.1, which was 5.8 times higher than that of a pure Co 3 O 4 gas sensor when exposed to 100 ppm ethanol. The enhanced gas sensing performance of the sensor fabricated by the CNT-rGO-Co 3 O 4 nanocomposites could be attributed to the promising synergistic effect between carbon nanomaterials and Co 3 O 4 nanobox, implying that the heterojunction structure and coupling effect would dramatically optimize the gas sensing reaction process, resulting in improved gas sensing performance.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2018
·
IF 6.434
Hailong Wang,Quanqin Hu,Yuan Meng,Zier Jin,Zilin Fang,Qinrui Fu,Wenhua Gao,Liang Xu,Yibing Song,Fushen Lu
Reduced graphite oxide (rGO) was incorporated into a metal organic framework (MOF) MIL-101(Cr) for the modification of carbon paste electrode. Taking advantages of the large surface area of MOF and the electrical conductivity of rGO, the resulted electrodes exhibited high sensitivity and reliability in the simultaneous electrochemical identification and quantification of catechol (CC) and hydroquinone (HQ). Specifically, in the mixture solution of catechol and hydroquinone (constant concentration of an analyte), the linear response ranges for catechol and hydroquinone were 10–1400 μM and 4–1000 μM, and detection limits were 4 μM and 0.66 μM (S/N = 3) for individual catechol and hydroquinone, respectively. Therefore, the relatively easy fabrication of modified CPE and its fascinating reliability towards HQ and CC detection may simulate more research interest in the applications of MIL-101(Cr)-rGO composites for electrochemical sensors.
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高影响因子
CARBON
·
2022
·
IF 11.307
Xiao-Ying Fu,Qi Zheng,Lin Li,Mao-Sheng Cao
It is still a challenging project for developing electromagnetic (EM) wave absorption materials with the properties of multi-band absorption in the field of microwave absorption . Herein, honeycomb-like MoSe 2 @reduced graphene oxide (RGO) composites are successfully constructed by a facile one-step solvothermal method. The polarization and conductive loss can be precisely tailored by vertically implanting MoSe 2 nanosheets on the RGO sheet. It is notable that three-band absorption, including S, X, and Ku bands, was achieved in the composites. The optimized MoSe 2 @RGO composite exhibits excellent microwave absorption performance, the maximum reflection loss (RL) value can reach −56.9 dB and an effective absorption bandwidth (EAB) value can reach 4.12 GHz. The excellent microwave attenuation capability is attributed to the synergy effect of conductive loss, multiple relaxations, and excellent impedance matching in the composites. Therefore, this work provides a new paradigm for developing efficient multifunctional EM wave absorbers.
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高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Huan Luo,Heng Li,Qingmei Ge,Hang Cong,Zhu Tao,Mao Liu
A novel chiral sensor was developed to produce the distinguishing response to the enantiomers of tyrosine (Tyr), with high sensitivity and selectivity. The electrochemical sensor was modified by the inorganic-organic nanohybrid material with the functionalization of reduced graphene oxide (rGO) to be the amplifier and a chiral hetero-multifarene[3,2,1] (CHMF[3,2,1]) as the chiral receptor. The as-prepared rGO-CHMF was characterized by transmission electron microscopy (TEM), atomic force microscope (AFM), infrared spectroscopy (IR), thermogravimetric analysis (TGA), Raman spectroscopy and electrochemical methods. It was observed that the composites exhibited different binding ability for Tyr enantiomers. The proposed sensor presented significant difference with peak potential separation value (ΔE p = 70 mV) and the ratio of peak current ( I L-Tyr / I D-Tyr = 1.58) for Tyr enantiomers by differential pulse voltammetry. In addition, the peak currents increased linearly with the concentration of Tyr enantiomers in the concentration range 0.1–10 μM with detection limits of 78 nM and 83 nM for l -Tyr and d -Tyr (S/N = 3), respectively. It also exhibited the ability to determine the percentage of one Tyr enantiomer in the racemic mixture. Moreover, the selectivity, reproducibility, and stability of the chiral sensor were investigated to give satisfactory results. The above discoveries offered an alternative technology for chiral recognition with electrochemical response to actualize a real-time and quantitative determination.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Bin Tan,Shenghua Han,Wenbin Luo,Zisheng Chao,Jincheng Fan,Mingyu Wang
MoS 2 as cathode materials of aluminum ion batteries can significantly improve the specific discharge capacity in the initial cycles. However, it electrical conductivity is poor and has strong interactions with higher charge density of Al 3+ cations. So MoS 2 cathode material suffers from rapid specific capacity decaying, which prevents the further development for aluminum ion batteries. Herein, a new phase engineering strategy is demonstrated for making MoS 2 -RGO (Reduced graphene oxide) composites for boosting the performance of aluminum ion batteries. Because the structure of MoS 2 is analogous to graphene, it can be used as a novel substrate for the growth of MoS 2 , which can increase the contact area of graphene and MoS 2 with forming perfect interlayer-overlapped composites. The Al/MoS 2 -RGO battery has a specific discharge capacity of 278.1 mAh/g in the initial cycles, and still maintains 150.2 mAh/g after 100 cycles.
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高影响因子
Canadian Journal of Chemistry
·
2020
·Vol. 98
·期 12
·
IF 1.171
Xin Chang,Xiangyang Xu,Zhifeng Gao,Yingrui Tao,Yixuan Yin,Guangyu He,Haiqun Chen
A nanocomposite, reduced graphene oxide (RGO) modified ZnCo2O4 (ZnCo2O4–RGO) was synthesized via one-step solvothermal method for activating persulfate (PS) to degrade bisphenol A (BPA). The morphology and structure of the nanocomposite were identified by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. RGO provides nucleation sites for ZnCo2O4 to grow and inhibits the agglomeration of the nanoparticles. The influence of different reaction conditions on the oxidation of BPA catalyzed by ZnCo2O4–RGO was investigated, including the content of RGO, the dosage of catalyst, the concentration of humic acid (HA), anions in the environment, the reaction temperature, and pH. BPA can be totally degraded within 20 min under optimized reaction conditions. The presence of HA, Cl−, and NO3− only has a slight effect on the oxidation of BPA, whereas the presence of either H2PO4− or HCO3− can greatly inhibit the reaction. ZnCo2O4–RGO shows good cycling stability and practical application potential. A reaction mechanism of the degradation of BPA was also explored.
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高影响因子
Journal of Energy Chemistry
·
2026
·
IF 15.6
Hanjun Wei,Zhiyong Chen,Yuxiang Lai,Siyu Chen,Lu Tang,Lianyang Chen,Jimei Xue,Zhijun Wang,Ying Li
Developing ultralight aerogels that simultaneously achieve efficient electromagnetic (EM) wave absorption and multifunctionality remains challenging because of the difficulty in synergistically regulating interfacial polarization, conductive networks, and hierarchical porous structures. In this work, an in-situ growth strategy is proposed to construct interface-rich YbCoO 3 /reduced graphene oxide (rGO) aerogels, in which pentagonal YbCoO 3 units are grown in-situ and anchored within a three-dimensional (3D) rGO framework. This architecture enables precise tuning of the heterointerface density, conductive pathways, and porosity, thereby optimizing impedance matching and enhancing EM attenuation. Moreover, the introduction of Yb 3+ ions with localized 4 f electrons induces strong spin-orbit coupling and magnetic anisotropy, promoting high-frequency magnetic resonance and improving magnetic loss. Therefore, the optimized YbCoO 3 /rGO aerogel (Ybr-3 sample) exhibits a remarkable minimum reflection loss (RL min ) of −62.4 dB at 3.2 mm and an ultrawide effective absorption bandwidth (EAB) of 10.0 GHz (8–18 GHz) at a thickness of 2.2 mm while maintaining an ultralow density of 0.0047 g/cm 3 and a low filler content of 5 wt%. Additionally, a significant reduction in the radar cross-section (∼40 dB m 2 ) confirms its superior EM wave attenuation capability. The hierarchical porous structure also imparts multifunctionality, including thermal insulation and efficient dye removal. Mechanistic studies reveal that the enhanced performance arises from the synergistic effects of interfacial polarization, conductive loss, magnetic resonance, and multiple scattering, which are further strengthened by 4 f -3 d electron interactions and interface-rich porosity. This work demonstrates that integrating in situ-growth-induced structural regulation with rare-earth electronic modulation provides an effective pathway for designing ultralight materials with broadband EM wave absorption and multifunctional properties. An interface-rich YbCoO 3 /rGO aerogel was constructed via an in-situ growth strategy, which promotes strong interfacial coupling and enables broadband microwave absorption with multifunctional integration. Download: Download high-res image (273KB) Download: Download full-size image
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