JOURNAL OF NANOPARTICLE RESEARCH
·
2019
·Vol. 21
·期 1
·15
·
IF 2.009
Tian Yuan,Sun Zhenghao,Zhao Yan,Zhang Yongguang,Tan Taizhe,Yin Fuxing
Novel Sb 2 Se 3 /reduced graphene oxide (rGO) composite, 1D Sb 2 Se 3 nanorods wrapped with rGO, has been successfully synthesized by a facile spray drying method. Compared to as-prepared Sb 2 Se 3 nanorods, the obtained Sb 2 Se 3 /rGO composite, as anode for lithium-ion batteries (LIBs), exhibited super electrochemical performances. The results suggest that Sb 2 Se 3 /rGO composite can retain a reversible capacity of 394 mAh g −1 over 200 cycles at 100 mA g −1 between 0.01 and 3 V (vs Li/Li + ). Even at a high rate current density of 1000 mA g −1 , a discharge capacity of 247 mAh g −1 was computed, indicating that this LIB possesses good rate capability. This improved electrochemical performance can be attributed to the 1D nanostructure, and also to the introduction of rGO, which provided more electron transport pathways and shortened the Li-ion diffusion through the electrolyte. Consequently, the cluster of 1D Sb 2 Se 3 nanorods that are wrapped in the rGO nanostructure can efficiently buffer large volume changes and retain the structural stability during lithiation and delithiation process, resulting in an excellent electrochemical performance.
Schematic illustration of the Sb 2 Se 3 /RGO composite synthesis process
研究领域:
材料科学
·
储能
·
纳米技术
·
电化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Wei Huang,Lin Zhang,Xuejun Lai,Hongqiang Li,Xingrong Zeng
With the increasing occurrences of industrial oily wastewater emissions and crude oil spills, the deteriorated global environment and ecosystems have attracted a great deal of attention worldwide. Herein we report a highly hydrophobic balsa wood sponge wrapped with fluoroalkyl silane modified reduced graphene oxide (F-rGO@WS) for efficient clean-up of all kinds of oils including viscous crude oil from water. The F-rGO@WS possessed excellent water repellency with a water contact angle of 145°. Owing to high hydrophobicity and longitudinal channels, the F-rGO@WS was successfully applied for separating oil-water mixtures, and the separation efficiency reached 99.0%. Furthermore, the F-rGO@WS also possessed quick electrothermal capability and could be utilized as a filter to efficiently separate viscous crude oil from water by means of the generated Joule heat under a low voltage, and the separation rate was about 10 times higher than that without voltage. Our findings stand out a new tool to fabricate functional natural materials and exhibit great potential in practical applications such as water pollution control and clean-up of viscous crude oil.
研究领域:
环境科学
·
材料科学
·
溢油修复
·
纳米材料
·
水污染控制
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Mengyao Luo,Xue Sun,Tingting Jiao,Q. Guangzhou
A simple hydrothermal method was employed to synthesize BiVO 4 supported on reduced graphene oxide (BiVO 4 /RGO) composite photocatalyst to enhance photocatalytic activity of BiVO 4 for degradation of dye wastewater under visible light. The prepared photocatalysts were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, UV-Vis DRS and photocurrent measurements. The photocatalytic performances of the BiVO 4 /RGO composite were evaluated by degradation of Orange II (AO7) under visible light irradiation (λ > 420 nm). A series of experiments were carried out to evaluate the effects of various factors on removal efficiency of AO7. The results show that the BiVO 4 /RGO composite exhibited much higher photocatalytic activity than pure BiVO 4 . The highest removal efficiency of AO7 was obtained, and reach 100% after 150 min when the doping content, pH value, catalyst dosage was GB30 (30 mg of GO corresponds to 1 mmol of BiVO 4 ), pH = 9 and 200 mg, respectively. The free radical trapping experiments show that • O 2 - played the most important role in the degradation of AO7. The enhanced catalytic activity of the BiVO 4 /RGO composite can be attributed to the RGO. As an electron acceptor and transporter, RGO can effectively promote charge transfer in composite and inhibit the recombination of photo-induced electron-hole pairs.
研究领域:
材料科学
·
环境化学
·
光催化
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yongyang Chen,Fulin Li,Xiaochun Dong,Dan Guo,Yixuan Huang,Shanping Li
Efficient and stable rGO@Ti/SnO 2 –Sb composite electrodes were prepared by the sol-gel method. The microscopic morphology , crystal structure, and electrochemical properties of the rGO@Ti/SnO 2 -Sb composite electrodes were characterized by a range of characterization techniques. The electrocatalytic oxidation activity of the electrodes was evaluated by the degradation efficiency of the fluoroquinolone antibiotic norfloxacin (NOR). Simultaneously, the effects of different experimental conditions on the degradation efficiency of NOR were also investigated, such as calcination temperatures, brushing times, initial pH, initial electrolyte concentration , etc. The enhanced electrocatalytic oxidation activity can be attributed to the excellent electron transfer efficiency, higher electrode specific surface area, and stronger adhesion of the electrode coating to the substrate. Additionally, the possible NOR degradation pathway was deduced through the main intermediates, and the mechanism of NOR degradation was discussed based on experimental and characterization results. This work provides a simple and effective method to prepare highly active composite electrodes for electrocatalytic oxidation to remove organic pollutants from water.
研究领域:
环境科学
·
电化学工程
·
材料科学
·
水处理技术
·
污染控制化学
·
纳米复合材料
·
环境功能材料
✓ 已验证
DOI
高影响因子
ACS ES&T Engineering
·
2026
·
IF 6.3
Shen Xiaotie,Li Ruiyi,Chen Baoliang,Zhu Xiaoying
The degradation of perfluorooctanoic acid (PFOA) remained
challenging
due to the extraordinary stability of its carbon–fluorine bonds,
which were resistant to conventional photocatalytic processes. In
this work, a metal–organic framework (MOF), MIL-125-NH 2 , was grown in situ on reduced graphene oxide (rGO) to form
nanocomposites (RMGs), enabling rapid PFOA degradation via an integrated
dual-redox pathway without the addition of sacrificial agents. Under
UV irradiation, the RMG composite achieved an 80.2% degradation of
PFOA (20 mg L –1 ) within 4 h, corresponding to an
apparent rate constant of 0.405 h –1 , and exhibited
competitive degradation productivity among reported photocatalytic
systems operating without external oxidants or sacrificial agents.
PFOA degradation exhibited pronounced pH dependence with the RMG composite
delivering optimal performance at pH 5. Moreover, the RMG catalyst
showed excellent stability and reusability. In natural water matrices,
the RMG composite achieved approximately 70% PFOA degradation within
10 h. The MOF/rGO heterojunction promoted directional charge separation,
enabling photogenerated holes to trigger carbon–carbon bond
cleavage and stepwise shortening of perfluorinated intermediates,
while electrons were efficiently transferred to PFOA to induce hydrogen–fluorine
atom exchange. Overall, this study highlights the pivotal role of
synergistic redox integration in enabling efficient PFOA remediation
in aqueous systems.
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Ma Junjie,Li Wei,Yang Deyi,Liu Zheng,Cao Yuyuan,Wang Shaocong,Han Guo-Cheng,Chen Qizhi
N-RGO/Na 3 V 2 (PO 4 ) 3 dual-modified Na 2 Fe 0.6 Mn 0.4 PO 4 F composites were prepared by sol–gel method combined with high-temperature calcination at 625 °C. Electrochemical tests show that the initial discharge specific capacity of N-RGO/Na 3 V 2 (PO 4 ) 3 -modified Na 2 Fe 0.6 Mn 0.4 PO 4 F composites is 149.27 mAh·g −1 at a current density of 0.05 C, and the discharge specific capacity can be maintained at approximately 101.89 mAh·g −1 after 100 cycles. This accounts for 68.26% of its initial discharge specific capacity. Rate performance tests showed that after cycling the current density back to 0.2 C, it was still able to recover to a discharge specific capacity close to 119 mAh·g −1 . At the same time, the interfacial properties of the N-RGO/Na 3 V 2 (PO 4 ) 3 dual-modified Na 2 Fe 0.6 Mn 0.4 PO 4 F composites were studied, and it was found that the capacity attenuation was due to irreversible structural changes such as agglomerated block cracking and structural collapse during multiple cycles, as well as the gradual thickening of the SEI film with the increase in cycle times. This study aims to apply N-RGO/Na 3 V 2 (PO 4 ) 3 dual-modified Na 2 Fe 0.6 Mn 0.4 PO 4 F composites to cathode materials for sodium-ion batteries, providing a theoretical basis for the development of fluorinated poly-anion compounds.
研究领域:
材料科学
·
电化学
·
储能技术
·
纳米材料
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 11
·2836
·
IF 3.623
Jin Shao,Yi Yang,Xiaoyan Zhang,Liming Shen,Ningzhong Bao
In this study, we have successfully prepared a free-standing Si/void/rGO yolk–shell structured electrode via the electrostatic self-assembly using protonated chitosan. When graphene oxide (GO) is dispersed in water, its carboxyl and hydroxyl groups on the surface are ionized, resulting in the high electronegativity of GO. Meanwhile, chitosan monomer contains -NH2and -OH groups, forming highly electropositive protonated chitosan in acidic medium. During the electrostatic interaction between GO and chitosan, which results in a rapid coagulation phenomenon, Si/SiO2nanoparticles dispersed in GO can be uniformly encapsulated between GO sheets. The free-standing Si/void/rGO film can be obtained by freeze-drying, high-pressure compression, thermal reduction and HF etching technology. Our investigation shows that after 200 charge/discharge cycles at the current density of 200 mA·g−1, the specific discharge capacity of the free-standing electrode remains at 1129.2 mAh·g−1. When the current density is increased to 4000 mA·g−1, the electrode still has a specific capacity of 469.2 mAh·g−1, showing good rate performance. This free-standing electrode with a yolk–shell structure shows potential applications in the field of flexible lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
柔性电子器件
✓ 已验证
DOI
高影响因子
RARE METALS
·
2021
·Vol. 40
·期 10
·2810-2818
·
IF 4.003
Xu Kun,Liang Xin,Wang Lu-Lu,Wang Yong,Yun Ju-Feng,Sun Yi,Xiang Hong-Fa
Abstract The popularity of lithium–sulfur batteries has been increasing gradually due to their ultrahigh theoretical specific capacity and energy density. Nevertheless, they also have lots of drawbacks to be overcome, such as poor conductivity, severe volume expansion, and serious “shuttle effect”. In this work, reduced graphene oxide/molybdenum dioxide (rGO/MoO 2 ) composite is synthesized and applied to modify polypropylene separator. The modified polypropylene separator introduces synergistic tri-functions of physical adsorption, chemical interaction and catalytic effects, which can inhibit the “shuttle effect” and enhance the electrochemical performances of lithium-sulfur batteries. In the prepared rGO/MoO 2 composite, the polar MoO 2 chemically adsorbs the intermediate lithium polysulfide, while the rGO with good electrical conductivity not only acts as a physical barrier to prevent diffusion of polysulfide ions, but also improves the conversion efficiency of active material intercepted on the separator. As a consequence, the battery assembled with rGO/MoO 2 modified polypropylene separator exhibits a reversible capacity of 757.5 mAh·g −1 after 200 cycles at 0.2C with a negligible capacity decay of 0.207% per cycle, which indicates a good long-period cycling stability. Furthermore, the rate performance and self-discharge suppression are also improved by introducing modified polypropylene separator. It shows that rGO/MoO 2 composite is a promising material for separator modification in lithium-sulfur batteries. Graphic abstract
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
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.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2026
·
IF 2.6
Xianjie Liu,Sijun Huang,Zhongzhi Yang,Jing Zhang,Qiuquan Zhang
Goose eggshell membrane (GESM) was taken as a flexible base material, residual egg white taken as a binder, and rGO taken as the thermo-sensitive component. Therefore, a high-sensitivity flexible temperature sensor is constructed by a simple coating method. This sensor displays an excellent flexibility. Its tensile strength is got an enhancement of 13.4% when compared with original GESM. This device gives a high temperature coefficient of resistance ( TCR ) which is −1.09%/°C, good linear property ( R 2 = 0.985), and a quick response time of 6–10 s. This sensor can keep its steady working condition after ten cold-heat change circles (25 and 46 °C), and it also can do this under repeated bendings with many different angles. This sensor holds significant potential for temperature monitoring applications.
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yuan Shu,Tingkai Zhao,Yatao Li,Lei Yang,Xianghong Li,Guyue Feng,Weiyu Jia,Fa Luo
Electromagnetic wave absorbers composed of reduced graphene oxide (RGO) and magnetic nanoparticles integrates dielectric and magnetic loss features, which is extremely desirable for enhancing electromagnetic wave absorption ability. Here, porous Fe/FeO/Fe 2 O 3 nanorods/RGO composites (FFORGO) are synthesized via anchoring FeO(OH) nanorods on graphene oxide (GO) through dopamine polymerization followed by thermal reduction treatment. The porous Fe/FeO/Fe 2 O 3 nanorods are anchored on RGO, and crosslinked structure formed in FFORGO composites when the GO addition is higher than 5 mg‧ml −1 . The abundant active sites (e.g., functional groups, dangling bonds, and lattice defects), the numerous heterointerfaces (among Fe, FeO, Fe 2 O 3 and RGO) and crosslinked structure trigger multiple dipole polarization, interface polarization and enhanced conductive loss. The EM wave absorption property is optimized by tuning the GO addition. FORGO4 with filler loading of 30 wt% achieves the maximal reflection loss of −24.1 dB at a thickness of 1.9 mm and the effective bandwidth below −10 dB of 3.01 GHz with a thickness of 2.2 mm, owing to the proper ratio of Fe/FeO/Fe 2 O 3 nanorods/RGO and synergistic effect between dielectric loss (dipole polarization, interface polarization, conductive loss) and magnetic loss (eddy current loss and exchange resonance). With the filler loading of 35 wt%, the maximal reflection loss of FFORGO4 is −50.7 dB at a thickness of 1.7 mm and the effective bandwidth reaches to 3.74 GHz at a thickness of 1.8 mm.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Hanwen Zhang,Liuxue Shen,Xiaodong Geng,Jianxin Zhang,Yue Jiang,Hongting Ma,Quanli Liu,Kai Yang,Junlin Ma,Nan Zhu
Sodium superionic conductor (NASICON) structured polyanionic materials have recently attracted great attention for robust crystal structures. However, inherent properties of NASICON presents poor electrical conductivity and low energy density. Herein, non-stoichiometric synthesized strategy is used for acquiring N 3.5 MTP, effectively suppressing voltage hysteresis. Besides, as-fabricated N 3.5 MTP grains in-situ grow on MXene-rGO aerogels by sol–gel synthesis approach obtaining N 3.5 MTP@MXene-rGO. MXene-rGO aerogel as an excellent conductive matrix can effectively avoid agglomeration of Na 3.5 MnTi(PO 4 ) 3 particles and alleviate volume change of the lattice during sodium ion intercalation/deintercalation. Moreover, cross-linked network of N 3.5 MTP@MXene-rGO provides fast electron transfer and ion transport rates. The above synergistic effect and contribution of pseudocapacitance make it an excellent discharge capacity of 189 mA h g −1 at 50 mA g −1 for N 3.5 MTP@MXene-rGO, long cycles of 5000 cycles, as well as 98 mA g −1 at −30 °C (50 mA g −1 ). Prospectively, this study provides an effective strategy for improving electrochemical performance of NASICON-type cathode for sodium batteries.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）