Chemosensors
·
2021
·Vol. 9
·期 8
·190
·
IF 3.398
Chengling Qu,He Li,Shuang Zhou,Guodong Li,Cheng Wang,Rony Snyders,Carla Bittencourt,Wenjiang Li
The engineering of an efficient electrochemical sensor based on a bismuth sulfide/reduced graphene oxide (Bi2S3/rGO) composite to detect ascorbic acid (AA) is reported. The Bi2S3nanorods/rGO composite was synthesized using a facile hydrothermal method. By varying the amount of graphene oxide (GO) added to the synthesis, the morphology and size of Bi2S3nanorods anchored on the surface of rGO can be tuned. Compared to a bare glassy carbon electrode (GCE), the GCE modified with Bi2S3/rGO composite presented enhanced electrochemical performance, which was attributed to the optimal electron transport between the rGO support and the loaded Bi2S3as well as to an increase in the number of active catalytic sites. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) analysis of Bi2S3/rGO/GCE demonstrate that the active Bi2S3/rGO layer on GCE plays an important role in the electrochemical behavior of the sensor. In particular, the Bi2S3/rGO/GCE sensor shows a wide detecting range (5.0–1200 μM), low detection limit (2.9 µM), good sensitivity (268.8 μA mM−1cm−2), and sufficient recovery values (97.1–101.6%) for the detection of ascorbic acid.Keywords:Bi2S3;reduced graphene oxide;ascorbic acid;electrochemical sensor
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SYNTHETIC METALS
·
2019
·
IF 2.87
Chen Fu,Dawei He,Yongsheng Wang,Xuan Zhao
In this study, Co nanoparticles coated with N-doped carbon films (Co@C) were fabricated using the facile one-pot method. Further, the microwave absorption performance of Co@C prepared at different calcination temperatures was evaluated. When calcinating at 700 °C, the reflection loss values of Co@C are lower than −20 dB with a thickness of 1.5–5.5 mm. The Co particles show enhanced resonation loss with the in situ growth of Co@C on the graphene oxide surface. The presence of reduced graphene oxide (RGO) can prevent agglomeration and reduce the loading content with excellent microwave absorption performance. As expected, the minimum reflection loss of Co@C/RGO reached −44.14 dB when the loading content was only 15% in a paraffin matrix. The considerable microwave absorption performance of this composite can be attributed to the enhanced impedance matching and large interface contact as well as dipolar polarization induced by RGO. This Co@C/RGO composite exhibiting enhanced microwave ability is considered to be an excellent candidate for developing lightweight microwave-absorbing materials.
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Journal of CO2 Utilization
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2017
·
IF 4.292
Changsheng Cao,Zhenhai Wen
Cu-based composites with different compositions and construction can seriously influence its electrocatalytic performance toward CO 2 reduction reaction (CO 2 RR). Herein, we report a microwave-assistant route to prepare Cu nanoparticles decorating reduced graphene oxide (CuNPs/rGO) nanohybrids, which are characterized by a variety of techniques, demonstrating that Cu nanoparticles coupling with Cu x O nanoparticles were uniformly anchored on the surface of rGO, as well as the existence of grain boundaries. The CuNPs/rGO composites are studied as electrocatalyst for CO 2 RR and show a favorable electrocatalytic activity toward CO 2 RR with an onset potential of −0.9 V, corresponding to about only 190 mv overpotential for CO generation. Besides with a small amount of HCOOH (<5%), H 2 and CO are the main CO 2 reduction products with a tunable ratio of from 1.16:1 to 6.38:1 by changing the applied potentials. The gaseous products with various ratio of H 2 to CO can be potentially used as syngas to produce more valuable products in industry. This work demonstrates a simple, facile and effective way to improve the electrocatalytic CO 2 RR performance of Cu-based composites.
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Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 41
·20513-20522
·
IF 9.931
Yunyun Huang,Aoxiang Xiao,Guanhua Hou,Hongtao Li,Tuan Guo,Bai-Ou Guan
An in situ strategy to understand the photocatalytic performance of Cu2O–Ag@rGO nanocomposites through interfacial photocatalysis on an optical microfiber has been proposed and experimentally demonstrated. The photocatalysts were conjugated on the surface of an optical microfiber immersed in an organic solution, forming an interface consisting of photocatalysts and organic molecules between the silica microfiber and the solution, which was within the evanescent field of the optical microfiber. In the photocatalytic process, the decomposition of organics changed the refractive index (RI) of the interface. The interaction between the evanescent wave and the microfiber interface modulated its optical spectrum. Therefore, the optical microfiber monitored the photocatalytic performance of the photocatalysts in real-time and in situ. The results reveal that the photodegradation efficiency of Cu2O–Ag@rGO was almost twice that of Cu2O, while the degradation rate constant was more than five times larger, because the coupling between the silver nanoparticles and reduced graphene oxide (rGO) enhanced the photocatalytic performance of Cu2O. By taking advantage of its miniature size and mechanical flexibility, the microfiber can directly probe a real matrix to study the local photocatalytic performance. This strategy is suitable for the evaluation of most photocatalysts and might provide a new perspective to assess the photocatalytic performance of the catalysts.
研究领域:
材料科学
·
光学
·
环境科学
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JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Qiang Li,Yanyi Wang,Ming Yang,Jianhui Zhu,Peixin Zhang,Zonggang Quan,Shichang Sun,Dingtao Ma
Aqueous zinc-ion battery (AZIB) attracts a great attention and becomes a hotspot due to its low cost and high safety in recent years. However, the sluggish transport kinetics of cathode materials is a significant drawback limiting their application. Herein, this work reports a novel VSe 2 /V 2 O 5 · n H 2 O/reduced graphene oxide ternary composite (VSe 2 /V 2 O 5 · n H 2 O/rGO) constructed with an anti-aggregation and porous 3D framework. The as-prepared ternary composite acting as cathode for AZIBs could provide a high capacity of 327.4 mA h g −1 at the current density of 0.2 A g −1 . More importantly, it also possesses excellent rate capability and cyclic stability, which deliver a specific capacity of 254 mA h g −1 at a high current density of 5 A g −1 . In addition, the structural evolution and transport kinetics of VSe 2 /V 2 O 5 · n H 2 O/rGO upon cycling are investigated. Benefiting from the high reversibility of phase evolution and the reduced graphene oxide (rGO) composition, the prepared VSe 2 /V 2 O 5 · n H 2 O/rGO can maintain a robust structure during cycling, improve the transport kinetics and thus displaying an outstanding electrochemical performance. This study offers a new route for designing cathode materials and promoting the development of high-performance AZIBs.
研究领域:
材料科学
·
电化学
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Biosensors-Basel
·
2025
·Vol. 15
·期 10
·703
·
IF 5.6
Harriet Sonia Nalumansi,Fuwei Pi,Jingkun Li,Guoyong Jiang
The detection of volatile organic compounds (VOCs) is critical for ensuring food safety, particularly for identifying spoilage gases and food adulterants. Surface Enhanced Raman Spectroscopy (SERS) has traditionally relied on noble metals such as gold and silver for strong electromagnetic enhancement. However, these substrates present challenges in terms of cost, stability, and integration into real-world applications. In this study, we explore a hybrid metal–organic framework (MOF) with reduced graphene oxide (rGO) as a SERS active substrate. The developed material showed a good sensitivity for VOC formaldehyde (FA), easily detectable at peak 1452 cm−1and offering an RSD of 16.95%. Since the substrate did not rely on any noble metals for SERS enhancement, this low cost and easy material could be fine-tuned, creating alternative less-toxic materials for detection in industries such as food safety.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Chunyan Chen,Zhiwu Huang,Guoqing Xiao,Chunlin Chen,Xuehu He,Jiaxiang Chen,Xuan Zhou,Jiajia Cui,Tianju Zhu,Jiajia Zhang
Hydrogen energy is a highly promising clean energy source, held immense potential for commercial applications. However, the inherent flammability of hydrogen posed significant safety challenges, creating an urgent need for the development of reliable, standalone, and cost-effective hydrogen sensors. Currently, main hydrogen sensors typically relied on high-temperature operating conditions, which to some extent limited their deployment in specific application scenarios. Our research focused on material systems and structural design. Hollow spherical ZnSnO 3 nanoparticles were first synthesized, followed by uniform loading of ZnSnO 3 onto rGO aerogel to form a p-n heterojunction. Notably, the ZTO@rGA-4 sensor exhibited a high response value (98.2) to 10,000 ppm hydrogen at 25 °C, with short response/recovery time (44/92 s), alongside excellent repeatability and long-term stability.
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PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2020
·Vol. 45
·期 8
·1293-1299
·
IF 1.544
Xiaomin Song,Qi Huang,Bo Jin,Rufang Peng
To improve the safety of CL-20, rGO was integrated into CL-20 (CL-20/rGO) by in-situ reduction. The prepared composites were characterized by Scanning electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, High-performance liquid chromatography and Power X-ray diffraction, which proves that the presence/encapsulation of rGO on CL-20 surface would not change the molecular structure, amount and crystal form of raw CL-20. In addition, the thermal stability of the composites has improved, while the mechanical sensitivity was desensitized compared to raw CL-20, suggesting this in-situ reduction could be utilized to improve the safety of CL-20.
研究领域:
材料科学
·
爆炸化学
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JOM
·
2020
·Vol. 72
·期 12
·4458-4465
·
IF 2.054
Lv Xiangyong,Liang Guangfen,Wang Qinzheng,Li Yandong,Duan Huamei,Chen Dengfu,Long Mujun,Hu Qingqing,Han Funian,Li Linpei
In this study, we prepared reduced graphene oxide (rGO) from natural graphite by a redox method. The salts Cu(NO 3 ) 2 and Ni(NO 3 ) 2 , Cu(NO 3 ) 2 and Zn(NO 3 ) 2 , Cu(NO 3 ) 2 , Ni(NO 3 ) 2 , and Zn(NO 3 ) 2 are loaded onto rGO by an impregnation method. The support material is calcined to obtain the fresh catalyst. The catalysts are analyzed by thermogravimetric analysis, x-ray diffraction, x-ray photoelectron spectroscopy, Raman analysis, and scanning and transmission electron microscopic imaging. The results showed that Ni and Zn are evenly distributed on the carrier. The size of the copper crystals in CuNi-rGO and CuZn-rGO is smaller than that of Cu-rGO. The smaller the copper crystal, the more easily Cu 2+ can be reduced to Cu 0 and Cu + .
The addition of Ni and Zn can promote reduction of Cu 2+ to Cu 0 and Cu + and may significantly improve the catalytic performance.
研究领域:
材料科学
·
化学
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Yifan Sun,Xuantong Gan,Bingrui Tong,Xiaoyue Yao,Hui Liu
Phenolic compounds, including catechol, pose significant environmental threats due to their high toxicity and low biodegradability. However, owing to the complex procedures, high cost, and low specificity of the present detection techniques, the on-site and real-time monitoring of catechol in real water remain challenging for practical use. In this work, we developed a FeS-rGO micro-nanocomposite-based biosensor for trace catechol detection in water. The material was engineered through a hydrothermal and oriented self-assembly approach that enabled in-situ growth of flower-like FeS on rGO, effectively preventing FeS agglomeration and enhancing interfacial integration. This designed structure synergistically combines the high surface area of FeS with the conductivity of rGO, promoting efficient electron transfer and catalytic activity. After laccase immobilization, the biosensor exhibits high selectivity for catechol against interfering phenols, with a sensitivity of 253 μA·mM −1 ·cm −2 and a broad linear range from 10 nM to 8.12 mM, which demonstrates potential application in the early-warning and treatment of environmental pollutant leakage.
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Small
·
2020
·Vol. 16
·期 26
·2000030
·
IF 11.459
Yaru Liang,Xiang Xiong,Zhuijun Xu,Qingbing Xia,Liyang Wan,Rutie Liu,Guoxin Chen,Shu-Lei Chou
Lithium-ion batteries (LIBs) have been widely applied and studied as an effective energy supplement for a variety of electronic devices. Titanium dioxide (TiO 2 ), with a high theoretical capacity (335 mAh g −1 ) and low volume expansion ratio upon lithiation, has been considered as one of the most promising anode materials for LIBs. However, the application of TiO 2 is hindered by its low electrical conductivity and slow ionic diffusion rate. Herein, a 2D ultrathin mesoporous TiO 2 /reduced graphene (rGO) heterostructure is fabricated via a layer-by-layer assembly process. The synergistic effect of ultrathin mesoporous TiO 2 and the rGO nanosheets significantly enhances the ionic diffusion and electron conductivity of the composite. The introduced 2D mesoporous heterostructure delivers a significantly improved capacity of 350 mAh g −1 at a current density of 200 mA g −1 and excellent cycling stability, with a capacity of 245 mAh g −1 maintained over 1000 cycles at a high current density of 1 A g −1 . The in situ transmission electron microscopy analysis indicates that the volume of the as-prepared 2D heterostructures changes slightly upon the insertion and extraction of Li + , thus contributing to the enhanced long-cycle performance.
研究领域:
材料科学
·
能源存储
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Gang Wang,Jinlei Miao,Xinyu Ma,Ching-Wen Lou,Jia-Horng Lin,Yun-Ze Long,Seeram Ramakrishna,Tingting Fan
Efficient cleanup of crude oil spills and wastewater treatment in harsh conditions remains a big challenge due to the absent of robust membrane materials. Herein, a kind of reduced graphene oxide and MXene (Ti 3 C 2 Tx) decorated PPS fibrous membrane with super chemical-resistance for all-weather cleanup of crude oil via Joule heat and solar-driven heat performance was reported. With the assist of the Joule heat and photothermal effect, the crude oil adsorption rate of composite membrane improved by more than 97 %. More importantly, the robust membrane still remained excellent oil/water separation performance even under strong acid and alkali conditions. Meanwhile, the gravity driven oil (dichloromethane)/water separation flux of composite membrane reached 11,502 L m -2 h −1 with a separation efficiency up to 99.98 %. Moreover, the composite membrane could realize solar-driven evaporation for seawater desalination due to its great photothermal properties, the evaporation rate could be up to 1.235 kg m -2 h −1 under one sun. The composite membrane also exhibited great electrical conductivity and EMI shielding performance for radiation protection with efficiency of 61.9 dB. This robust multifunctional fibrous membrane design offers a progressive approach for the efficient cleanup of viscous crude oil spills, oil/water separation, solar desalination and EMI shielding under harsh environments.
研究领域:
材料科学
·
环境科学
·
能源科学
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