MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Xin-Yang Lu,Sheng-Feng Zhang,Fen-Ying Kong,Zhong-Xia Wang,Heng-Ye Li,Hai-Lin Fang,Wei Wang
In this paper, a glassy carbon electrode (GCE) modified with TiO 2 -ZnO-reduced graphene oxide (TiO 2 -ZnO-rGO) nanocomposites was designed for the selective and simultaneous quantification of hydroquinone (HQ) and catechol (CA). The TiO 2 -ZnO-rGO nanocomposites were prepared by a simple ultraviolet irradiation method for the first time. In the process of ultraviolet radiation, the photogenerated electrons in TiO 2 and ZnO were transfered into GO which was then reduced to form rGO. Benefiting from functional properties of different components and synergistic effect, the TiO 2 -ZnO-rGO nanocomposites exhibited excellent sensing performance for the selective and simultaneous determination of HQ and CA. Under the optimized conditions, the linear ranges for selective assay of HQ or CA in the existence of 40 µM of the respective isomer are 5–500 µM. The linear ranges for simultaneous assay of HQ and CA are obtained from 0.1 to 100 µM with the detection limits of 0.03 µM (HQ) and 0.05 µM (CA), respectively. The TiO 2 -ZnO-rGO/GCE also displayed excellent stability and satisfactory recovery when applied for real water samples analysis.
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DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Xiaoqian Dong,Xiaochen Yu,Xu Zhang,Zhehan Zhang,Xiao He,Ruru Wei,Youru Bai,Jibin Fan
Tb-ZnO/reduced graphene oxide (Tb-ZnO/RGO) nanocomposites were prepared by a simple one-step solvothermal method. The samples were characterized by XRD , SEM, XPS, BET, FT-IR, and Raman spectroscopy , and their photocatalytic activities toward different pollutants (RhB, MO, PR, and MB) degradation were evaluated. Tb-ZnO/RGO nanocomposite shows enhanced photocatalytic activity with high kinetic constants (0.04 min −1 ) and good stability. Enhanced charge separation and migration have been analyzed using UV–Vis absorption spectra , PL spectra, and EIS analysis. Improved photocatalytic activity can be ascribed to the smaller band gap, larger specific surface area (28.3478 m 2 /g) and more effective separation and transport of photogenerated carriers by Tb 3+ and RGO. All the results show that the nanocomposite catalyst has a good application prospect in the degradation of pollutants.
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高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yu Rao,Kongjun Zhu,Guoliang Zhang,Feng Dang,Jiatao Chen,Penghua Liang,Zhihan Kong,Jun Guo,Hongjuan Zheng,Jie Zhang,Kang Yan,Jinsong Liu,Jing Wang
Molybdenum sulfide has been widely investigated as a prospective anode material for Li+/Na+ storage because of its unique layered structure and high theoretical capacity. However, the enormous volume variation and poor conductivity limit the development of molybdenum sulfide. The rational design of a heterogeneous interface is of great importance to improve the structure stability and electrical conductivity of electrode materials. Herein, a high-temperature mixing method is implemented in the hydrothermal process to synthesize the hybrid structure of MoS2/V2O3@carbon-graphene (MoS2/V2O3@C-rGO). The MoS2/V2O3@C-rGO composites exhibit superior Li+/Na+ storage performance due to the construction of the interface between the MoS2 and V2O3 components and the introduction of carbon materials, delivering a prominent reversible capacity of 564 mAh g–1 at 1 A g–1 after 600 cycles for lithium-ion batteries and 376.3 mAh g–1 at 1 A g–1 after 450 cycles for sodium-ion batteries. Theoretical calculations confirm that the construction of the interface between the MoS2 and V2O3 components can accelerate the reaction kinetics and enhance the charge-ionic transport of molybdenum sulfide. The results illustrate that interfacial engineering may be an effective guide to obtain high-performance electrode materials for Li+/Na+ storage.
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高影响因子
BIOSENSORS & BIOELECTRONICS
·
2019
·
IF 9.518
Jiangle Yi,Zhen Liu,Jianhui Liu,Hanbiao Liu,Fangquan Xia,Dong Tian,Changli Zhou
A novel label-free electrochemical aptasensor was fabricated based on a three-dimensional porous electrode (3D-CS/rGO/GCE) for the detection of acetamiprid residues. The sensing signal was generated by the DNA itself. The porous electrode was prepared by electrodeposition in situ and characterized by scanning electron microscope (SEM), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). These results indicated that the porous electrode has a uniform nanoporous structure, high active area, and excellent conductivity , leading to improve the transmission efficiency of current signals. The 3D-CS/rGO/GCE was used to increase a load of acetamiprid aptamer on the electrode. Meanwhile, DNA self-assembly strategy was used to further increase the DNA amounts. Thus the electrochemical current was amplified significantly due to increased phosphate group amounts by the above synergistic effect . The determination of acetamiprid residues using square wave voltammetry (SWV) showed good sensitivity, with the linear range from 0.1 pM to 0.1 μM and the detection limit was 71.2 fM. The label-free electrochemical aptasensor was also used to detect acetamiprid residues in tea samples with satisfactory results.
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DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Mingyan Chai
Foodborne pathogenic bacteria can cause food poisoning or infection. Salmonella is an aerobic or partly anaerobic gram-negative bacterium that enters the body with food, invades the intestine and releases large amounts of endotoxin. The endotoxin acts as a pyrogen that leads to an increase in body temperature and acts on the intestinal mucosa to trigger systemic inflammation and toxic symptoms in the host. The development of novel methods and systems for the monitoring and detection of foodborne pathogenic bacteria is of great significance for food safety, especially the development of simple, high-throughput and highly sensitive rapid detection techniques. This work proposes a novel aptamer sensor based on reduced graphene oxide (rGO)-AuNPs for the detection of Salmonella in food. Firstly the rGO and AuNPs were modified on the surface of glassy carbon electrode in turn, and then a highly sensitive sensor was made by designing a segment of thiolated aptamer probe that could specifically capture Salmonella . The high electron transport ability of rGO and the advantage of large specific surface area of AuNPs were adopted to achieve signal amplification and improve the detection capability. In the presence of Salmonella , the aptamer traps and immobilizes Salmonella on the surface of the electrode, resulting in a change in the immediate current in the sensor and realizing quantitative detection of Salmonella based on the change in electrical signal. Under the optimized conditions, the response current of the constructed aptamer sensor is linearly related to the logarithmic value of Salmonella concentration, with a linear range of 6×10 2 cfu/mL~6×10 7 cfu/mL and a detection limit of 200 cfu/mL (S/N=3). Meanwhile, this sensor has been successfully applied in the detection of Salmonella in pork and beef.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Aerzigu Xukeer,Jin Li
In this work, we synthesized the ternary nanocomposite of ZnO/TiO 2 /rGO and used as formaldehyde gas detection at room temperature (RT). The integration of rGO with the ZnO/TiO 2 heterostructure enhanced the composite’s responsiveness at RT. The presence of rGO enhanced conductivity, mechanical stability, and charge transfer, in addition to providing more active sites for CH 2 O molecule adsorption. Sensors based on ZnO/TiO 2 /rGO exhibited a response of 86 to 50 ppm formaldehyde, with response and recovery times significantly shortened to 11 s and 3 s, respectively. Additionally, the selectivity, stability, and repeatability of the sensors were also evaluated. Our method of sequentially combining ZnO with TiO 2 , followed by incorporating rGO to form a ternary heterostructure, effectively optimizes ZnO. This two-step approach addresses the limitations of slow desorption efficiency and low response associated with ZnO. We conducted first-principles computation to understand the sensing performance.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Kaihan Xue,Hang Chen,Biao He,Ruikang Wu,Chun Sun,Yonghui Zhang,Pengyu Zhou,Mengjun Wang,Hongxing Zheng,Chao Fan
Reduced graphene oxide (rGO) has attracted considerable interests as high-efficiency electromagnetic wave (EMW) absorbers for eliminating the increasingly serious EMW pollution, owing to its excellent conductivity, light-weight, and large surface area. However, its practical applications are still hindered by the poor impedance matching and monotonous loss mechanism. In this work, IV-VI tin disulfide (SnS 2 ) with a similar layered structure to rGO is introduced, and SnS 2 /rGO composites are synthesized through a facile two-step hydrothermal method. Due to the improvement of the impedance matching, the SnS 2 /rGO composites exhibit an enhanced EMW absorption performance with a minimum reflection loss of −35.91 dB at a thickness of 4.0 mm and an effective absorption bandwidth of 3.3 GHz in the 2–18 GHz range, which is prior to individual component materials (SnS 2 and rGO) and even most rGO-based composites. Moreover, because of multiple loss mechanisms, the radar cross-section reduction of the SnS 2 /rGO composites can reach to 12.2 dBm 2 at an incidence angle of 0°. This work provides an effective approach to enhance the EMW absorption capacity of rGO and paves the way for the further applications of rGO and rGO-based composites.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yuanyuan Zhang,Dong Zhang
All-solid-state structural supercapacitors (ASSCs), as a kind of multifunctional energy storage devices, show great application potential in the field of building. However, the inability to achieve high energy density is a major bottleneck in the application of ASSCs. Herein, a novel 3D nanosheet material is designed by a facile method, aiming to boost areal-energy-density for ASSCs. By doping of S (Na 2 S·9 H 2 O) on the rGO/N 1 C 1 M nanosheet (rGO/N 1 C 1 M-S 3 ’), we achieved an extremely areal capacitance of 9407.62 mF/cm 2 at 5 mA/cm 2 , which is much higher than 4421.33 mF/cm 2 (rGO/N 1 C 1 M). Definitely, this is the best performance reported so far for rGO/NCM electrode. An asymmetric ASSCs (1 cm × 1 cm×0.2 cm) prototype device exhibits excellent performance, with a high areal capacitance of 242.82 mF/cm 2 , a high areal-energy-density of 0.076 mWh/cm 2 at 3 mA/cm 2 . As a proof-concept-application. the ASSCs was enlarged to 4.5 cm × 4.5 cm × 0.2 cm, three ASSCs connected in series can light up a green light emitting diode indicator about ～1066 s, and can still work normally under the pressure of 500 g. The demonstration of employing rGO/N 1 C 1 M-S 3 ’ electrode opens up new opportunities to fabricate high performance ASSCs for structure energy storage in building.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ziqi Liu,Hua Ning,Ruojiang Liu,Sizhi Ding,Jiakun Yang,Yuanxin Tan,Yi Fan,Renhuan Li,Peilin Qing,Haizhen Liu,Jin Guo,Zhiqiang Lan
The application prospects of MgH 2 as a potential solid hydrogen storage material are limited by its stable thermodynamic properties and slow hydrogenation/dehydrogenation kinetics. In this study, a ternary heterogeneous composite material V 2 O 3 -TiO 2 -rGO (V-T-rGO) was synthesized using the ultrasonic hydrothermal method and doped into MgH 2 through ball milling to improve its hydrogen storage performance. The experimental results demonstrated that the MgH 2 + V-T-rGO samples exhibit superior hydrogen storage properties compared with single-doped V 2 O 3 , TiO 2 , rGO or V-T materials. Specifically, it can uptake hydrogen at room temperature, and adsorbs 5.00 wt% H 2 in just 4 min at 150 °C, and releases 5.87 wt% H 2 within 6 min at 325 °C, demonstrating a faster reaction rate and successful hydrogen absorption. Additionally, the hydrogenation/dehydrogenation activation energies of MgH 2 + V-T-rGO samples are measured at 27.1/72.3 kJ·mol −1 , representing a reduction of 51.2/59.2 kJ·mol −1 compared to MgH 2 alone. Mechanistic analysis revealed that the multiphase composite system produced synergistic catalytic effects, providing abundant active sites and hydrogen diffusion channels to enhance the hydrogen storage performance of MgH 2 . This study presents an innovative approach for constructing transition metal oxide heterostructured materials and holds significant reference value for applications in the field of hydrogen storage.
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Huaxiong Liu,Biao Chen,Hongye Qin,Ning Wang,Enzuo Liu,Chunsheng Shi,Naiqin Zhao
Transition metal dichalcogenides (TMDs) have been widely studied as a promising sulfur host material in Li-S batteries due to their unique physical and chemical properties. Great efforts have been made to prepare carbon/TMDs, especially graphene/TMDs heterostructures as the cathodes of Li-S batteries. Recently, ReS 2 shows a new 1T′ phase and great potential in Li-S batteries because of its stable structure and a large amount of catalytic active sites. Herein, we prepared a new ReS 2 nanosheets anchored on rGO (rGO/1T′-ReS 2 ) composite as a lithium polysulfides (LiPSs) immobilizer and electrocatalyst for Li-S batteries. The unique pore structure and rGO incorporation can effectively mitigate volume expansion and enhance electronical conductivity. Moreover, the novel 1T′ phase of ReS 2 shows both efficient chemical adsorption function and large electrocatalytic active sites of LiPSs . These advantages have been demonstrated by both characterization techniques and theoretical calculations. As a result, the rGO/1T′-ReS 2 /S nanosheets display significantly enhanced coulombic efficiency, rate performance and cycling stability compared with the rGO/S nanosheets and the rGO/1T′-ReS 2 /S nanospheres.
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2018
·Vol. 5
·期 9
·2092-2099
·
IF 5.106
Jinxue Guo,Ke Zhang,Yanfang Sun,Yingxia Zong,Ziyang Guo,Qingyun Liu,Xiao Zhang,Yongyao Xia
Layered MoS2 has been recognized as a promising low-cost alternative to Pt-based electrocatalysts towards the hydrogen evolution reaction (HER). Intensive interest has been mainly focused on designing MoS2 nanostructures with large amounts of active edge sites and fast charge transfer. Here we report the synthesis of vanadium and nitrogen co-doped MoS2 on reduced graphene oxide with new defect sites on the basal/edge planes and expanded interlayer spacing, which shows remarkable catalytic merits with an extremely low overpotential of 68 mV at 10 mA cm−2 and a Tafel slope of 41 mV dec−1. Its performance is superior to most current MoS2 electrocatalysts. In addition to the charge transfer benefits of the RGO substrate, the vanadium and nitrogen dopants trigger defect sites on the basal/edge planes, and an optimized electronic structure and expanded interlayer distance are also responsible for the enhancement in catalysis. This contribution may offer a potential way to design advanced MoS2 catalysts by modulating the defect sites and interlayer distance for efficient electrochemical water splitting.
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高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 12
·5407-5415
·
IF 3.5
Sijie Duan,Yue Peng,Hongyu Guan,Weilin Chen
The crystalline quality of perovskite films is a key factor that affects the performance of perovskite photovoltaic devices. Polyoxometalates can better match the energy levels of each layer in the devices through their own suitable energy level and band gap, and the good light absorption of POMs can also increase the mobility of photogenerated carriers in the devices. Moreover, POMs with Keggin-type structures can also improve the crystalline quality of perovskite films by eliminating defect sites, which can lead to better crystallization of perovskites with larger grains. In this study, we optimized the crystalline quality of a perovskite layer using the SiW9Co3@rGO composite prepared using POMs and graphene derivatives. XRD and SEM tests show that the crystallization degree of the perovskite layer was improved, the average grain size of which can reach up to 1222.92 nm, which is nearly four times higher than that of a blank perovskite. The photoresponse current of a SiW9Co3@rGO-doped photodetector can reach to 43.94 μA, which is about 226% higher than that of an undoped device. At the same time, the addition of the composite can improve the stability of photodetectors because of the special network structure of graphene. Photodetectors doped with SiW9Co3@rGO can still maintain more than 90% of their high performance for a month. This study proves that POM-based composites have good application prospects in the field of photovoltaic devices.
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高影响因子
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