Canadian Journal of Chemistry
·
2020
·Vol. 98
·期 12
·
IF 1.171
Xin Chang,Xiangyang Xu,Zhifeng Gao,Yingrui Tao,Yixuan Yin,Guangyu He,Haiqun Chen
A nanocomposite, reduced graphene oxide (RGO) modified ZnCo2O4 (ZnCo2O4–RGO) was synthesized via one-step solvothermal method for activating persulfate (PS) to degrade bisphenol A (BPA). The morphology and structure of the nanocomposite were identified by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. RGO provides nucleation sites for ZnCo2O4 to grow and inhibits the agglomeration of the nanoparticles. The influence of different reaction conditions on the oxidation of BPA catalyzed by ZnCo2O4–RGO was investigated, including the content of RGO, the dosage of catalyst, the concentration of humic acid (HA), anions in the environment, the reaction temperature, and pH. BPA can be totally degraded within 20 min under optimized reaction conditions. The presence of HA, Cl−, and NO3− only has a slight effect on the oxidation of BPA, whereas the presence of either H2PO4− or HCO3− can greatly inhibit the reaction. ZnCo2O4–RGO shows good cycling stability and practical application potential. A reaction mechanism of the degradation of BPA was also explored.
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高影响因子
CARBON
·
2022
·
IF 11.307
Xiao-Ying Fu,Qi Zheng,Lin Li,Mao-Sheng Cao
It is still a challenging project for developing electromagnetic (EM) wave absorption materials with the properties of multi-band absorption in the field of microwave absorption . Herein, honeycomb-like MoSe 2 @reduced graphene oxide (RGO) composites are successfully constructed by a facile one-step solvothermal method. The polarization and conductive loss can be precisely tailored by vertically implanting MoSe 2 nanosheets on the RGO sheet. It is notable that three-band absorption, including S, X, and Ku bands, was achieved in the composites. The optimized MoSe 2 @RGO composite exhibits excellent microwave absorption performance, the maximum reflection loss (RL) value can reach −56.9 dB and an effective absorption bandwidth (EAB) value can reach 4.12 GHz. The excellent microwave attenuation capability is attributed to the synergy effect of conductive loss, multiple relaxations, and excellent impedance matching in the composites. Therefore, this work provides a new paradigm for developing efficient multifunctional EM wave absorbers.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Imamdin Chandio,Suet Cheung,Lei Wu,Mengyang Cui,Yongjian Ai,Qionglin Liang
Early detection of cancer is critical for reducing mortality and improving patient outcomes, yet it remains a challenge due to limitations in existing diagnostic methods. Alpha-fetoprotein (AFP), a glycoprotein predominantly produced during fetal development, has emerged as a vital biomarker for diagnosing cancers such as hepatocellular carcinoma (HCC), germ cell tumours, and yolk sac tumours. However, conventional methods for AFP detection, including immunoassays and enzyme-linked techniques, face challenges such as high costs and limited sensitivity. Here, we have developed a novel label-free electrochemical aptasensor based on a reduced graphene oxide-gold nanoparticle-MXene composite (rGO-AuNPs@MXene). This hybrid material leverages the high conductivity and catalytic activity of AuNPs, the large surface area and stability of rGO, and the exceptional electrochemical properties of MXenes. The rGO-AuNPs@MXene based composite offers high sensitivity, excellent selectivity, and favorable biocompatibility for the detection of AFP. NH 2 -aptamers were immobilized onto the rGO-AuNPs@MXene-modified electrode, enabling precise AFP recognition through specific aptamer-target interactions. The aptasensor demonstrated a broad detection range (10 fg mL −1 to 1 μg mL −1 ), with an ultra-low limit of detection of 13.91 fg mL −1 (S/N = 3). It demonstrated excellent stability, with only a 3.80 % decrease in signal after 8 days of storage, and remarkable reproducibility, showing a relative standard deviation of 1.85 % across five electrodes. These findings emphasize the remarkable efficiency of the rGO-AuNPs@MXene composite in producing highly sensitive and reliable electrochemical aptasensors. This innovation underscores its substantial potential for advancing early cancer detection and improving clinical diagnosis.
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高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Cheng Xue,Cong Qi,Wenzhu Li,Jia Lian
In order to boost the photothermal conversion and solar evaporation efficiency of membrane, mixed cellulose ester (MCE) filter membranes was modified by reduced graphene oxide (rGO) and Fe 3 O 4 nanoparticles, and a novel rGO-Fe 3 O 4 -MCE membrane was developed. Firstly, the solvothermal synthesis process of hybrid material rGO-Fe 3 O 4 was presented, and then the preparation process of rGO-Fe 3 O 4 /MCE membrane was introduced. Effects of different rGO mass fractions, rGO-Fe 3 O 4 loadings and light intensity on the photothermal evaporation of the thin membrane were experimentally researched. Results indicated that rGO-Fe 3 O 4 /MCE membrane shows excellent sunlight absorption and photothermal conversion efficient owing to its fast water transport capability, the evaporation rate is 1.501 kg m −2 h −1 , and the solar vapor conversion efficiency is 89.69 %, which exceeds the conversion efficiency of most previous solar evaporators. The membrane desalination performance and durability study were also conducted. Cycling tests confirmed that the system is able to maintain stable performance for 20 cycles under the same lighting conditions. The novel rGO-Fe 3 O 4 /MCE membrane of this paper has great potential application value owing to its great photothermal conversion efficiency, stable mechanical properties, cost-effectiveness, simple preparation process, and strong reusability.
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RSC Advances
·
2025
·Vol. 15
·期 23
·18444
·
IF 4.6
Sanoober Bhagat,Sana-ul-Nisa,Tania Ghumro,Jamil A Buledi,Amber R Solangi,S Tufail H Sherazi
The current study uses the ionic liquid (IL) 1-butyl-3-methylimidazolium hexafluorophosphate, also known as BMIM-PF 6 , as a stabilizing agent to synthesize a bismuth oxide/ionic liquid/reduced graphene oxide (Bi 2 O 3 /IL/rGO) hybrid nanomaterial. A range of techniques, including scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR), and UV-visible spectroscopy, were used to characterize the synthesized Bi 2 O 3 /IL/rGO nanocomposite. XRD confirmed that the composite was crystalline, and FTIR analysis suggested the presence of certain functional groups. The main elements oxygen, carbon, and bismuth were confirmed by EDX analysis, and SEM imaging showed an exfoliated and detached morphology. The synthesized nanocomposite was used to modify a glassy carbon electrode to develop a sensor for the detection of lead (Pb 2+ ). The fabricated sensor was characterized using electrochemical impendence spectroscopy (EIS) and cyclic voltammetry (CV). The results indicated that the Bi 2 O 3 /IL/rGO/GCE was more conductive, having a charge transfer resistance ( R ct ) of 428.5 Ω compared to 1870 Ω for the bare electrode. The sensor has a low detection limit of 0.001 μM and a quantification limit of 0.003 μM. When tested on water and soil samples, the sensor was confirmed to have acceptable recovery rates, ranging from 95% to 102%. In conclusion, our fabricated sensor has excellent performance in terms of ease, affordability, energy usage, and quick efficiency. The ionic liquid BMIM-PF 6 was used as stabilizing agent to synthesize Bi 2 O 3 /IL/rGO hybrid nanocomposite. A sensor was developed by modifying the surface of GCE by using hybrid nanocomposite for the detection of Pb 2+ in environmental samples.
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PubMed
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.
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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.
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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.
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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.
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高影响因子
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
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·Vol. 46
·期 7
·5664-5676
·
IF 4.939
Shaohui Zhang,Qingxin Li,Haikun Zhou,Wei Xuan,Yili Liang,Zhiyong Xie,Feng Liu
In this paper, Pd catalysts supported on novel composite carbon supports were synthesized by the carbonization and hydrogen reduction of Pd 2+ -doped bacteria containing Ketjen EC600JD, CNT and rGO, respectively. The analysis results show that the prepared catalysts exhibit excellent ORR electrocatalytic performance in acid medium. The best ORR electrocatalytic performance was obtained for Pd/carbonized-bacteria-rGO, which exbibits a mass activity at 0.345 A mg −1 that is 9.58 times higher than commercial Pd/C, and meanwhile displays a better stability than that of Pd/C. The enhanced performance can be attributed to nitrogen doping and flexible carbon-coating microstructure. Herein, we elaborate an efficient and ecofriendly method for the synthesis of electrocatalysts used for oxygen reduction reaction.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhe Ni,Xiaolin Chen,Jie Yan,Jin Zhang,Zhou Yang,Dalong Yang,Renguo Guan
Graphene, due to its unique mechanical properties, thermal conductivity and electrical conductivity, is considered as a reinforcement for metal materials. However, there are still issues with graphene aggregation and weak bonding at the graphene/metal interface. In this study, in-situ reduction techniques by nascent hydrogen was used to reduce graphene oxide (GO), and reduced graphene oxide (rGO) coated the Al powder to prepare composite powder. The composite powder was pre-shaped into blocks by hot-press sintering and the interface bonding issue of rGO/Al was improved by multi-pass rolling processes. Raman spectroscopy and XPS were used to analyze the reduction of GO. SEM, HRTEM and EBSD were used to analyze the composition, structure, and morphology of composites. The mechanical properties of the composite materials were studied. The results showed that GO was reduced to that almost all oxygen-containing groups were removed and uniformly dispersed in the Al matrix. The microstructure of the composites was dense, with good metallurgical bonding, and no apparent defects or porosity. When the loading amount is below 0.20 wt%, the ultimate tensile strength ( UTS ), yield strength ( YS ), and Young's modulus ( E ) were increasing along with the increased rGO content. When the addition amount was 0.20 wt%, UTS (147.67 MPa), YS (126.83 MPa), and E (36506.37 MPa), of the rGO/Al composites increased by 51.89 %, 37.87 %, and 94.48 %, compared to pure Al produced using the same process.
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高影响因子
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