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.
研究领域:
分析化学
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材料科学
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环境科学
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2020
·Vol. 12
·期 14
·3769-3775
·
IF 4.853
Guihua Zeng,Liqiong Hou,Jialing Zhang,Jiaqian Zhu,Xiang Yu,Xionghui Fu,Yi Zhu,Yuanming Zhang
Graphical PEC water splitting : A novel FeOOH/rGO/BiVO 4 photoanode was prepared for the first time with excellent PEC performance in which rGO as a hole-transporting layer significantly enhanced carrier separation efficiencies and FeOOH greatly accelerated the water oxidation kinetics. Bismuth vanadate (BiVO 4 ) is regarded as a potential material in photoelectrochemical (PEC) water splitting, but the photocurrent of BiVO 4 photoanode is much lower than its theoretical value for the high recombination of photo-induced charges and slow water oxidation kinetics. Here, we constructed a FeOOH/rGO/BiVO 4 photoanode, in which rGO could enhance the photogenerated electron-hole separation efficiency by transporting holes and the FeOOH could greatly accelerate the water oxidation kinetics. This novel photoanode displayed excellent PEC performance with the photocurrent density of 3.25 mA cm −2 at 1.23 V vs. RHE, 3.28 times higher than BiVO 4 photoanode (0.99 mA cm −2 ), and long-term stability with the Faraday efficiency of ∼98 % for 3 hours, demonstrating its great potential for PEC water splitting. The photoanode also provided a novel insight into the role of rGO to transport holes rather than electrons in improving the carrier separation efficiency.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Xinmeng Zhang,Xin Wen,Jiahan Yang,Ji Li,Yuanting Wu
The Globe Thistles-Like (GTL) NiCo 2 S 4 nanostructures were supported on reduced graphene oxide modified filter paper (FP). The prepared GTL NiCo 2 S 4 /rGO/FP is investigated as a disposable and flexible electrode for the electrochemical detection of H 2 O 2 in alkaline media. Owing to the rich redox active sites, the synergistic effect between Co 3+ and Ni 2+ , and the rapid electron transportation of substituting sulfur (S) for oxygen (O) in NiCo 2 O 4 , the GTL NiCo 2 S 4 /rGO/FP exhibits considerable enzyme-free H 2 O 2 sensing performance with wide linear H 2 O 2 ranging from 38.8 to 37306.8 μM, high sensitivity of 2.4326 mA mM −1 cm −2 , and low detection limit of 0.08 μM. The GTL NiCo 2 S 4 /rGO/FP electrode has stable sensing performance and is highly selective toward analyte for physiological interfering species. The excellent electrochemical performance of GTL NiCo 2 S 4 /rGO/FP composite is attributed to the GTL structure of NiCo 2 S 4 . By studying the hydrothermal reaction time, electrochemical active surface area, and hydrophilic-hydrophobic surfaces of GTL NiCo 2 S 4 /rGO/FP composite, the relationship between the microstructure and sensing performance of the composite was elucidated. Surely this study opens up new possibilities for the application of low-cost, biodegradable flexible electrode materials in wearable sensors in the near future.
研究领域:
材料科学
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生物医学工程
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Industrial Textiles
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2022
·
IF 2.926
Xinghua Hong,Wei Sun,Tao Peng,Junnan Qian,Zhaofa Zhang,Chengyan Zhu,Guangmin Cai
Herein, a MnFe2O4/RGO knitted fabric derived from manganese waste was constructed by a simple in-situ assembled coating method, involving the incorporation of Graphene Oxide (GO) and manganese ferrite nanoparticles on polyester fabric, followed reducing by hydrazine hydrate. The reuse of manganese waste from the preparation of GO can reduce chemical waste emissions and endow the absorption performance. The coated particles possess certain magnetism can be attracted and securely collected in seconds, which is convenient for recycling. This fabric gives well microwave absorption with the maximum reflection loss (RL) of −58.6 dB at 9.1 GHz by a thickness of 1.9 mm. In addition, this fabric presents high stable strain sensing under 1000 stretching and bending cycles. Meanwhile, the resistance-deformation-velocity relationship is provided based on the structure, for the analysis of electromechanical behaviors. Moreover, the fabric has the capability for temperature sensing (TCR=−0.738%/°C), and fire alarm. As such, this fabric can be promising alternatives for a wide application on motion and temperature sensing, microwave blocking.
研究领域:
材料科学
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环境科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
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2021
·
IF 7.086
Chao Xue,Wanling Cai,Xiulan Weng,Gary Owens,Zuliang Chen
The use of biomass for the synthesis of value-added products, such as functional nanomaterial for the removal of contaminants, is a challenge. In this study, hybrid bimetallic Fe/Ni nanoparticles and reduced graphene supported bimetallic Fe/Ni nanoparticles (Fe/Ni-rGO) were prepared via a one-step green synthesis using green tea extract, and thereafter evaluated for the simultaneous removal of rifampicin (RIF) and Pb(II) from aqueous solution. The efficiencies of Pb(II) and RIF removal by Fe/Ni-rGO were 87.5 and 96.8%, respectively. The removal performance of the hybrid Fe/Ni-rGO was better than either n Fe/Ni, rGO, or Fe-rGO. Detailed characterization and analyses of Fe/Ni-rGO indicated that both Fe and Ni nanoparticles were evenly distributed over the surface of rGO and that aggregation of Fe, Ni nanoparticles, and stacking of rGO in the hybrid were decreased. Furthermore, while LC-TOF-MS analysis showed that RIF was degraded into small-molecule fragments, XPS showed that Pb(II) was not reduced to Pb 0 . The major conditions impacting removal efficiency, adsorption kinetics, and fit to adsorption isotherm models were examined to better understand the removal mechanism. While the adsorption of both contaminants fit well a pseudo-second-order kinetic model, the adsorption of RIF fit the Freundlich isotherm model best, while the adsorption of Pb(II) fit the Langmuir isotherm model best. Thus, the removal mechanism of both contaminants firstly being chemical adsorbed onto the surface, while n Fe/Ni continues to participate in the catalytic reduction of RIF. Moreover, Fe/Ni-rGO could be reused and performed well for wastewater treatment , thus suitable as a practical resource recycling technology .
研究领域:
环境科学
·
纳米材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Longjie Liu,Jiajiang Lin,Gary Owens,Zuliang Chen
Wastewater from sewage treatment plants containing 17α-estradiol (αE 2 ) has a high potential to cause environmental and human toxicity. Integration of adsorption and Fenton-like oxidation is one of the potential approaches to enhance αE 2 removal. In this study, one-step biosynthesized iron nanoparticles/reduced graphene oxide (FeNPs/rGO) by tea extract was successfully used for αE 2 removal. The results showed that the removal of αE 2 by FeNPs/rGO increased to 56.1%, being only 25.4% and 45.4% for rGO and FeNPs, respectively, indicating that both adsorption and Fenton-like oxidation enhanced the removal of αE 2 , where was confirmed by HPLC-UV. To understand the removal mechanism, characterizations, including ESR, SEM, EDS, FTIR and XPS were used to elucidate the specific roles of rGO and FeNPs in the adsorption and oxidation of αE 2 , and results showed that αE 2 was adsorbed as a monolayer on the surface of rGO via π–π bond interactions and that FeNPs underwent reactions with H 2 O 2 to generate ·OH for αE 2 degradation. Thereafter, a αE 2 degradation pathway was proposed via identification of degradation products (e.g., C 18 H 22 O 3 ) by HPLC-MS. Moreover, the removal of αE 2 by FeNPs/rGO conformed to the Langmuir isotherm with pseudo-first-order adsorption kinetics and pseudo-second-order degradation kinetics. Based on these evidences, the removal of αE 2 by FeNPs/rGO was presented.
研究领域:
环境科学
·
生物学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
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IF 6.14
Yanying Wang,Zhaoyi Zhang,Xin Liu,Fang Ding,Ping Zou,Xianxiang Wang,Qingbiao Zhao,Hanbing Rao
We developed a hydrothermal synthesis and high temperature calcination method to synthesize the metal–organic framework (MOF)-derived NiCo2O4/NiO and NiCo2O4/NiO-rGO. These composites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Brunner–Emmet–Teller measurements. This work combines excellent catalytic efficiency of the transition metal with large specific surface area and large number of pores of the MOF. Consequently, catalysts for oxygen evolution with high efficiency and low cost were obtained. Both materials show lower overpotential at 430 and 350 mV, respectively, under 10 mA·cm–2. The Tafel slopes are 49 and 66 mV·dec–1, respectively, with very small performance attenuation for long-term catalytic reaction. Therefore, the catalysts reported herein possess great potential for application in oxygen evolution reaction.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Desen Zhou,Jun Zhang,Zhenxing Jin,Tingmin Di,Tielin Wang
Photocatalytic CO 2 reduction has been considered as a potential way to solve the energy problem and the greenhouse effect. In this work, layered g-C 3 N 4 /rGO/NiAl-LDHs heterojunctions were prepared by using a hydrothermal method, the optimized composite exhibited enhanced photocatalytic CO 2 reduction to CO (2.6 μmol h −1 g −1 ) and CH 4 (20 μmol h −1 g −1 ) activity, which was 3.7 and 14.2 times higher than that of pure g-C 3 N 4 , respectively. According to the experimental and density functional theory calculation (DFT) results, it is believed that with the large contact interface and excellent electron mobility rGO could act as an electron transfer bridge to facilitate the rapid charge migration and separation between g-C 3 N 4 and NiAl-LDHs. Thus, driven by the internal electric field, interfacial band edge bending, as well as the type II heterostructure, the activity of g-C 3 N 4 /rGO/NiAl-LDHs could be greatly enhanced. This work provides a possible way to rational design and fabrication of rGO-assisted composite systems with type II, Schottky, S-scheme, P-N and other heterojunctions.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 6
·811
·
IF 4.034
Shun Zhou,Zefeng Deng,Zhongkang Wu,Mei Xie,Yaling Tian,Yiyong Wu,Jun Liu,Guangli Li,Quanguo He
l-tryptophan is one of the eight kinds of essential amino acids for sustainable human life activity. It is common to detect the concentration of tryptophan in human serum for diagnosing and preventing brain related diseases. Herein, in this study, GCE (glassy carbon electrode) modified by Ta2O5-reduced graphene oxide (-rGO) composite (Ta2O5-rGO-GCE) is synthesized by the hydrothermal synthesis-calcination methods, which is used for detecting the concentration of tryptophan in human serum under the as-obtained optimal detection conditions. As a result, the obtained Ta2O5-rGO-GCE shows larger electrochemical activity area than other bare GCE and rGO-GCE due to the synergistic effect of Ta2O5NPs and rGO. Meanwhile, Ta2O5-rGO-GCE shows an excellent response to tryptophan during the oxidation process in 0.1 M phosphate buffer solution (pH = 6). Moreover, three wide linear detection range (1.0–8.0 μM, 8.0–80 μM and 80–800 μM) and a low limit of detection (LOD) of 0.84 μM (S/N = 3) in the detection of tryptophan are also presented, showing the larger linear ranges and lower detection limit by employing Ta2O5-rGO-GCE. Finally, the as-proposed Ta2O5-rGO-GCE with satisfactory recoveries (101~106%) is successfully realized for the detection of tryptophan in human serum. The synthesis of Ta2O5-rGO-GCE in this article could provide a slight view for the synthesis of other electrochemical catalytic systems in detection of trace substance in human serum.
研究领域:
生物医学工程
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分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2021
·Vol. 104
·期 12
·6696-6708
·
IF 3.784
Huaiyang Chen,Xiaoping Shen,Keqiang Xu,Yao Chen,Aihua Yuan,Zhenyuan Ji,Zhitao Wang,Guoxing Zhu
Binary transition-metal oxides with spinel structure have great potential as advanced anode materials for lithium-ion batteries (LIBs). Herein, NiFe-NiFe 2 O 4 / reduced graphene oxide (rGO) composites are obtained via a facile cyanometallic framework precursor strategy to improve the lithium storage performance of NiFe 2 O 4 . In the composites, NiFe-NiFe 2 O 4 nanoparticles with adjustable mass ratios of NiFe 2 O 4 to NiFe alloy are homogeneously deposited on rGO sheets. As anode material for LIBs, the optimized NiFe-NiFe 2 O 4 /rGO composite displays remarkably enhanced lithium storage performance with an initial specific capacity as high as 1362 mAh g −1 at 0.1 A g −1 and a decent capacity retention of ca . 80% after 130 cycles. Besides, the composite delivers a reversible capacity of 550 mAh g −1 at 1 A g −1 after 300 cycles. During the charge–discharge cycles, the aggregation of the NiFe-NiFe 2 O 4 nanoparticles and the structural collapse of the electrode can be well alleviated by rGO sheets. Moreover, the conductivity of the electrode can be significantly improved by the well-conductive NiFe alloy and rGO sheets. All these contribute to the improved lithium storage performance of NiFe-NiFe 2 O 4 /rGO composites.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Shang Wu,Xin Xu,Xin Sun,Sheng Zhou,Chaoyang Liu,Penghui Zhang,Shuaishuai Fu,Hong Zhang,Shaofeng Pang,Xia Wang,Quanlu Yang
Metal organic framework (MOF) as an electrode material is still a great challenge due to inherent instability and poor electrical conductivity . Herein, we design a material rGO/NiCo 2 S 4 , which by using GO and metal organic framework (ZIF-67) as the template and precursor. Additionally, the presence of GO and ZIF-67 can increase specific surface area and provide active sites for redox reactions and shortens ion transport pathways. The synthesized of rGO-10/NiCo 2 S 4 has excellent electrochemical properties as electrode material, which has a high specific capacity of 171 mAh g −1 and 121.9 mAh g −1 (1 A g −1 and 10 A g −1 ). The as-obtained rGO-10/NiCo 2 S 4 //AC asymmetric supercapacitor (ASC) of power density is 870 W kg −1 when the specific energy 41 Wh kg −1 , and with 88.2 % capacitance retention after 5000 cycles at 5 A g −1 . Therefore, the rGO-10/NiCo 2 S 4 derived from ZIF-67 as electrode materials for high-performance asymmetric supercapacitors has a good prospect.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Qi Zhao,Zihan Liu,Ziyue Xu,Bowen Li,Siqi Yang
The real-time and effective detection of n-butanol gas is particularly important in production and daily life due to its flammability, toxicity, and potential hazards to the environment. This article reports the preparation of hollow indium oxide spheres and rGO/In 2 O 3 composites through a simple hydrothermal and subsequent heat treatment method. Test results indicate that the gas sensitivity of n-butanol can be significantly improved through rGO composites. The prepared hollow indium oxide spheres are composed of nanosheets with a diameter of probably 500 nm. After combination by rGO, the specific surface area and the proportion of adsorbed oxygen of the material are increased, both of which are advantageous for enhancing gas sensitivity abilities. At the optimum operating temperature of 160 °C, the response value of rGO/In 2 O 3 complex sensor is 51–50 ppm of n-butanol, which is 3.6 times the response of pure In 2 O 3 . Gas sensors composed of rGO/In 2 O 3 exhibit ultra-fast response time and low detection limit. Even for ppb grade (100 ppb) n-butanol gas, the response value is still 2.3. These characteristics make rGO/In 2 O 3 a promising material for the preparation of high-performance n-butanol gas sensors. Besides, the gas-sensitive mechanism of the enhanced n-butanol sensing performances is also analyzed.
研究领域:
材料科学
·
传感器技术
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）