MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 2
·1-10
·
IF 6.408
Huang Hui,Xie Shuqian,Deng Lu,Yuan Jie,Yue Ruirui,Xu Jingkun
A nanocomposite of rGO/MXene-Pd/rGO with hierarchical structure based on Ti 3 C 2 T x MXene, Pd nanoparticles, and reduced graphene oxide (rGO) was synthesized by a green approach. Ti 3 C 2 T x MXene decorated with Pd nanoparticles (MXene-Pd) was prepared first. Then, graphene oxide (GO), MXene-Pd, and GO were coated on the surface of the glassy carbon electrode (GCE) in sequence. After each coating of the GO layer, the GO nanosheets were reduced to rGO electrochemically. The fabricated rGO/MXene-Pd/rGO hierarchical framework performs a pie structure with MXene-Pd as the stuffing and rGO nanosheets as the crust, which will be beneficial to the enhancement of its electrochemical sensing performance. As compared with other electrodes, the rGO/MXene-Pd/rGO/GCE exhibited higher electrocatalytic activity and better sensing performance for luteolin detection, with a wide linear range of 6.0 × 10 −10 to 8 × 10 −7 M and 1.0 × 10 −6 to 1.0 × 10 −5 M (oxidation peak potential E pa = 0.34 V vs . SCE), a low detection limit of 2.0 × 10 −10 M, and a high sensitivity of 112.72 µA µM −1 cm −2 . Moreover, the fabricated sensor also showed high selectivity, reproducibility, and repeatability toward the detection of luteolin. The real sample analysis for luteolin in honeysuckle was successfully carried out by rGO/MXene-Pd/rGO and verified with high-performance liquid chromatography (HPLC) analysis techniques with acceptable results. All the above tests indicate the promising application prospect of the rGO/MXene-Pd/rGO framework for luteolin detection in honeysuckle and other herbs containing luteolin. Graphical abstract
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Hao Zhang,Xiaodie Li,Chengming Xiao,Jia Xie,Xin Yan,Chaohai Wang,Yujun Zhou,Junwen Qi,Zhigao Zhu,Xiuyun Sun,Jiansheng Li
Selective capture of the toxic and ubiquitous heavy metal ions is crucially desired yet still significant challenge for water purification. Herein, a covalent organic framework-reduced graphene oxide nanocomposite (TpPa@rGO) was developed and employed as cathode for the first time to selectively remove Pb 2+ from complex water via an electrosorption process. Specifically, the rGO provides the electrical conductivity and induces the electric double layer capacitance to attract cations approaching to the electrode surface, while the TpPa endows abundant highly selective redox-active sites to capture Pb 2+ . Thanks to the ingenious synergy of capacitive rGO and redox-active TpPa, more than 99.6% of Pb 2+ can be effectively removed by the TpPa@rGO electrode in a mixed solution containing Pb(NO 3 ) 2 (50 mg L −1 ) and multicomponent nitrates (100 mg L −1 for each), as well as good cycling stability. Interestingly, the interfering ions can serve as additional electrolytes to accelerate the accumulation of Pb 2+ around the TpPa@rGO electrode instead of competing for active sites, thereby increasing the absolute adsorption capacity of Pb 2+ from 94.6 mg g −1 in single Pb(NO 3 ) 2 solution to 129.8 mg g −1 in the multicomponent solution. The enhanced selective electrosorption mechanism on Pb 2+ removal by TpPa@rGO and their recyclability were also investigated. The capacitive matrix and additional electrolytes accelerate the ion transfer and enhance ion accessibility to the electrode, thereby anchoring the Pb 2+ on the N/O groups of TpPa. This study may put forward a promising method for the selective capture of heavy metal ions in complex water.
研究领域:
环境科学
·
材料科学
·
化学工程
·
水处理
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DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2024
·Vol. 39
·期 4
·937-944
·
IF 1.3
Tan Yan,Hao Panpan,He Yang,Zhu Rufeng,Wang Yuedan
Poly(3, 4-ethylenedioxyethiophene)-polystyrene sulfonic acid (PEDOT:PSS)/polyallyl dimethyl ammonium chloride modified reduced graphene oxide (PDDA-rGO) was layer by layer self-assembled on the cotton fiber. The surface morphology and electric property was investigated. The results confirmed the dense membrane of PEDOT: PSS and the lamellar structure of PDDA-rGO on the fibers. It has excellent electrical conductivity and mechanical properties. The fiber based electrochemical transistor (FECTs) prepared by the composite conductive fiber has a maximum output current of 8.7 mA, a transconductance peak of 10 mS, an on time of 1.37 s, an off time of 1.6 s and excellent switching stability. Most importantly, the devices by layer by layer self-assembly technology opens a path for the true integration of organic electronics with traditional textile technologies and materials, laying the foundation for their later widespread application.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Da Wang,Stefanos Giannakis,Jingyu Tang,Kai Luo,Juntao Tang,Zhiqiao He,Shuang Song,Lizhang Wang
In this work, we synthesized magnetic reduced graphene oxide (rGO) encapsulated hexagonal FeTiO 3 (FTO@rGO) nanosheets with rGO loading amount of 0, 1, 5 and 10 wt%, with a primary objective of efficiently degrading venlafaxine (VLF) through photo-Fenton processes across a wide pH range of 3–11. The inherent visible-light photocatalytic ability of ilmenite FeTiO 3 (FTO) and catalytic activation of H 2 O 2 by Fe sites during the photo-Fenton process were established. Through the strategic integration of rGO, all FTO@rGO catalysts show higher VLF degradation rate than FTO in photo-Fenton evolution experiments and the FTO@rGO catalysts with rGO loading amount of 5 wt% presents the highest VLF degradation rate (100 % VLF degradation at 90 min), which attributed to the accelerated migration of photo-generated electrons and the efficient Fe 2+ /Fe 3+ cycle. Furthermore, the encapsulation of rGO significantly mitigated Fe leaching throughout the reaction pH range, directing H 2 O 2 activation to occur at the FTO@rGO interface instead of in solution. Through a comprehensive analysis, we identified 47 intermediate products of VLF and deduced the degradation pathway based on 12 representative intermediates. The degradation process was primarily driven by hydroxyl radicals as the dominant reactive oxygen species, complemented by the contribution of superoxide radicals, photogenerated electrons, and holes during the FTO@rGO-catalyzed photo-Fenton process. This study not only expands the application of ilmenite in the realm of advanced oxidation processes (AOPs) but also provides valuable insights for the future exploration and development of metal oxide/carbonaceous heterostructure catalysts.
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Tiancheng Na,Yang Liu,Xiangcun Li,Wenji Zheng,Yan Dai,Zhijun Yan,Wei Kou,Gaohong He
We report a method based on 2,4-dihydroxybenzoic acid-formaldehyde (RF-COOH) microsphere hard templates to prepare core-shelled Fe 2 O 3 microspheres , which were then added to graphene oxide to obtain hierarchical reduced graphene oxide, ultimately dropping Fe 2 O 3 (Fe 2 O 3 @rGO) by Vitamin C reduction and freeze drying. When used as cathode materials for lithium-sulfur batteries, Fe 2 O 3 @rGO shows a high specific capacity of 400.5 mAh g −1 at 2 C after 500 cycles. The prominent performance is due to the collaborative assembly of rGO , which provides stable structural support and favourable conductivity, and core-shelled Fe 2 O 3 microspheres, which are certified to have a strong interaction with polysulfides. The loose and stable skeletons of highly electroconductive rGO can offer a conductive framework for rapid ion/electron transport. Meanwhile, the unique core-shelled structure of Fe 2 O 3 with the ample void space can anchor polysulfides through the strong chemical adsorption and buffer the mechanical stresses caused by volume expansion during the charge and discharge processes. Moreover, Fe 2 O 3 promotes the transformation of polysulfides to insoluble LiPSs during the discharging process, effectively alleviating the shuttling of the polysulfides.
研究领域:
材料科学
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能源存储
·
电化学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Yongli Sun,Baoli Wang,Na Yang,Xiaowei Tantai,Xiaoming Xiao,Haozhen Dou,Luhong Zhang,Bin Jiang,Deqiang Wang
Electrochemical water splitting, which is economical and sustainable, has been considered as one of the most potential methods to produce large amounts of hydrogen with high purity. However, the development of uniformly dispersed electrocatalysts with robust catalytic activity and high stability for electrochemical water splitting still faces great challenges. In this study, poly(ionic liquid) (PIL) was used as a bridge between the polyoxometallate and the reduced graphene oxide (RGO) to anchor Mo uniformly on the surface of the RGO. As a result, the Mo2C-RGO exhibits excellent activity in hydrogen evolution reactions in acidic media with a small overpotential of 99 mV to drive 10 mA cm–2 and a low Tafel slope (54.6 mV dec–1) in acidic solution, and no significant degradation was observed after 20 h of operation. This facile strategy offers new opportunities to accurately design functional 2D materials with unique properties.
研究领域:
材料科学
·
化学工程
·
能源科学
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DOI
高影响因子
Environmental Science-Nano
·
2017
·Vol. 4
·期 11
·2134-2143
·
IF 6.047
Chen Tian,Jian Zhao,Jing Zhang,Shengqi Chu,Zhi Dang,Zhang Lin,Baoshan Xing
Roxarsone (ROX) is an emerging arsenic pollutant due to its potential degradation into highly toxic inorganic arsenic species in the environment. Adsorbents which can capture ROX with both high capacity and affinity are urgently needed. Herein, a nanocomposite of nano-Fe3O4 and three-dimensional graphene (Fe3O4@RGO) was designed, aiming to simultaneously attract arsenate and benzene groups in ROX. Characterization of the nanocomposite revealed that Fe3O4 nanoparticles (20–50 nm) with exposed (400) planes were highly dispersed on the graphene support. Adsorption experiments showed that Fe3O4@RGO had higher adsorption capacity, affinity, and adsorption rate towards ROX than pristine materials and efficiently removed ROX from both simulated natural and waste waters. The adsorption mechanism was confirmed as a synergetic interaction of As–Fe coordination, hydrogen bonding and π–π interaction. X-ray photoelectron spectroscopy (XPS) and extended X-ray absorption fine structure (EXAFS) results suggested that the As–Fe complexes and hydrogen bonds between Fe3O4@RGO and ROX were stronger than those in pristine nano-Fe3O4, due to the greater number of surface hydroxyls and shorter As–Fe atomic distance in Fe3O4@RGO. The π–π interaction between ROX and the graphene part in Fe3O4@RGO was also enhanced. This study provided a novel idea for designing materials to remove pollutants with both inorganic and organic moieties, such as phenylarsonic acid compounds, from water.
研究领域:
环境科学
·
材料化学
·
水污染控制
·
纳米技术
·
分析化学
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DOI
高影响因子
Advanced Fiber Materials
·
2025
·
IF 21.3
Du Jiani,Li Tian,Li Jiatong,Tang Jingyuan,Zhang Runhua,Liu Yanan,Feng Jiamin,Meng Fanbin
Fabrics have attracted significant attention in the field of electromagnetic shielding due to their unique grid structure, high electrical conductivity, and flexibility. To enrich the research of textiles for microwave absorption, two-dimensional transition metal carbide (MXene)-enhanced reduced graphene oxide-based fabrics (MXene/RGO fabrics) were synthesized in this paper by using wet spinning–ionic cross-linking–chemical reduction strategy. MXene/RGO fabrics achieve a minimum reflection loss of − 58.3 dB at 17.6 GHz and a thickness of 2.4 mm, with an effective absorption bandwidth of 4.92 GHz. In addition, the combination of electromagnetic finite element simulation technology and test results was used to further elucidate the response mode and loss mechanism of MXene/RGO fabrics. The MXene/RGO composite fibers exhibit a tuned attenuation ability and impedance matching performance, which is attributed to the increased polarization relaxation loss caused by the large number of heterogeneous interfaces between RGO, MXene, and TiO 2 particles, as well as the appropriate electrical conductivity (16.6 S/cm). MXene/RGO fibers exhibit excellent microwave absorption performance, mechanical strength (534 MPa), easy modification, and fatigue resistance, promising stable absorption of electromagnetic waves in complex environments, thereby expanding the application scenarios of fabrics in the field of microwave absorption. Graphical
研究领域:
材料科学
·
电磁学
·
纺织工程
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Jiehong Huang,Weizhen Chen,Xiang Yu,Xionghui Fu,Yi Zhu,Yuanming Zhang
In this work, a ternary BiOCl/carbon quantum dots (CQDs)/reduced graphene oxide (rGO) composite photocatalyst with high removal efficiency of ciprofloxacin was fabricated. For BiOCl/CQDs/rGO-10, rGO greatly enhanced the adsorption capacity, while rGO and CQDs significantly improved the photocatalytic performance by enhancing the charge separation and charge injection, which were 3.8 and 8.4 times higher than those of BiOCl, respectively. Interestingly, the photon absorption rate of BiOCl/CQDs/rGO-10 was only 1.3 times higher than that of BiOCl, suggesting that CQDs and rGO could not improve the effective light absorption although they could enhance the light harvesting ability and demonstrating the enhancement in light harvesting ability was not an essential factor for improving photocatalytic activity. In addition, BiOCl/CQDs/rGO-10 displayed high stability and the photocatalytic mechanism of ciprofloxacin was also proposed. This work not only exhibited an excellent reference with outstanding adsorption-photocatalytic performance in application of water remediation, but also provided a new insight into the roles of CQDs and rGO in the adsorption and photocatalysis for CQDs or rGO based composite photocatalysts.
研究领域:
环境科学
·
材料科学
·
水处理
·
光催化
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DOI
高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
Changhai Li,Guohua Jiang,Muslum Demir,Yanfang Sun,Rui Wang,Tianqi Liu
In this study, reduced graphene oxide/MXene-based composite electrodes combined with Fe 2 O 3 and NiCo-P as the negative and positive electrodes are prepared by a facile in-situ solvothermal route. Both rGO/MXene@Fe 2 O 3 and rGO/MXene@NiCo-P have an interconnected nanostructure with the specific surface areas at 17.1 and 131.9 m 2 ·g −1 . The specific capacitance of the as-prepared rGO/MXene@Fe 2 O 3 and rGO/MXene@NiCo-P composite electrodes are 248.13 and 214.66 mAh·g −1 under current density at 1 A·g −1 . An asymmetric supercapacitor (ASC) is further assembled using rGO/MXene@Fe 2 O 3 and rGO/MXene@NiCo-P as the negative and positive electrodes, respectively. The maximum energy density of the assembled ASC is 29.46 Wh·kg −1 at a power density of 700.34 W·kg −1 . After 10,000 cycles, 70.87 % of the capacity can be retained. These results demonstrate the potential application of composite electrode materials for supercapacitors .
研究领域:
材料科学
·
储能
·
纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Qing Zeng,Chongshan Yin,Xi Li,Chunqing He
The wide distribution of the lateral size of lab-prepared graphene oxide (GO) sheets often complicates the measurement of accurate average size. Herein, a series of reduced-GO/polyethyleneimine (RGO/PEI) composite membranes with compact brick-wall structures were successfully prepared. The large lateral size of RGO sheets in the membrane benefited gas barrier properties, including oxygen, nitrogen, and water vapor. The RGO sheets acted as impermeable inorganic filler to prolong the diffusion path, forcing gas molecules to wiggle through the permeable and tortuous channels of the PEI/water mixture. The water vapor transmission rate of RGO/PEI composite membranes was relatively high, and a linear correlation was established between the length of PEI/water channels and the water vapor barrier property. The length of PEI/water channels under the same membrane thickness was determined by the lateral size of RGO sheets. Therefore, the statistic averages of lateral size of RGO sheets (from 2 . 48 μ m to 44 . 35 μ m ) showed a linear correlation with the water vapor barrier property, as confirmed by the positron annihilation technique and molecular dynamics simulations. In sum, the linear correlation could be used to practicably measure the statistic averages of lateral size of GO sheets according to water vapor permeability measurements.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Jin Mao,Qi Zhang,Peiwu Li,Liangxiao Zhang,Wen Zhang
Geometric architecture of composite photocatalytic system creates a favorable chance for enhanced photocatalytic activity, which is a challenging and rewarding direction in this area. Here, a novel and highly efficient three-components composite consisting of dispersive WO 3 nanowires, g-C 3 N 4 nanosheets and RGO as solid electron mediator was successfully designed, synthesized and characterized. The WO 3 /RGO/g-C 3 N 4 composite exhibited markedly enhanced activity for the photocatalytic degradation of aflatoxin B 1 under visible-light irradiation compared with single and binary catalysts. It was found that the synergistic effects coexisted in this ternary composites that depended on the geometric architecture and interface combination of components. The Z-scheme system formed when RGO was as an interlayer between WO 3 and g-C 3 N 4 , while the mechanism was the heterojunction-type in absence of RGO. It was found that the O 2 − , h + and OH were main active radicals during photodegradation of AFB 1 over ternary composites, which was proved by the radical trapping tests and ESR detection. Finally, a probable enhanced photocatalytic degradation mechanism of ternary composites and the degradation products were also proposed. This work may not only provide beneficial information to design and synthesis of effective composites system, but also present a new way to remove the refractory natural pollutant.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）