JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Yongheng Xiong,Yuting Li,Shipeng Wan,Yang Yu,Shule Zhang,Qin Zhong
Electrochemical reduction of NO to NH 3 (NORR) is an attractive approach to mildly realize NO removal and valuable NH 3 production. The electrolyte, as function as the NO absorbent, is crucial to apply electrochemical technology in practical de-NO engineering. In this paper, the ferrous chelate acted as the electrolyte for effective NO absorption in NORR based on the Brown-ring reaction. The rGO and Au/rGO catalysts served as cathodes to realize ferrous regeneration for continuous NO reduction. The results revealed that ferric chelate could be fully reduced at lower onset potential on rGO electrode. The Au/rGO catalyst exhibited excellent average yield and selectivity for NH 3 at − 0.1 V and pH = 6.32, (14.6 μmol* h −1 * cm −2 and 65.2%, respectively). The Faradaic Efficiency of NH 3 could reach 98.3% at pH = 1.0. This work provides a valuable reference for effective NO adsorption and sustainable NO-to-NH 3 conversion.
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DOI
高影响因子
NANO
·
2018
·
IF 1.1
Yanan Li,Zhongmin Liu,Yaru Li,Yongchuan Wu,Jitao Chen,Yanjun Liu,Ping Na
The Bi 2 S 3 -TiO 2 -RGO composites were synthesized by a facile one-step hydrothermal method and applied for the photocatalytic degradation of Rhodamine B (Rh B) under the visible light. The Bi 2 S 3 -TiO 2 -RGO composites were characterized by transmission electron microscopy, X-ray diffraction, Raman and Fourier transform infrared spectrometer. The results indicated that the Bi 2 S 3 -TiO 2 -RGO composites were successfully prepared, and Ti-O-C and S-C bonds were existing among Bi 2 S 3 , TiO 2 as well as RGO. Furthermore, the photocatalytic ability of Bi 2 S 3 -TiO 2 -RGO composites was excellent under visible light due to its responding to the whole visible light region, low recombination rate of photogenerated electron–hole pairs and relatively negative conduction band. Rh B photocatalytic degradation rate was 99.5% after 50 min and still could reach 98.4% after five cycles. Finally, a formation mechanism as well as a photocatalytic mechanism of Bi 2 S 3 -TiO 2 -RGO composites were proposed based on the experimental results.
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DOI
高影响因子
Applied Sciences-Basel
·
2022
·Vol. 12
·期 6
·2882
·
IF 2.838
Jiawei Zhang,Xiguan Chen,Chunyu Liu,Lixiong Wen
Using a process-enhanced micro-impinging stream reactor (MISR) and a co-precipitation route, NiCo2S4and NiCo2S4/rGO electrode materials were successfully prepared, respectively. Owing to its excellent micromixing performance, the MISR-prepared NiCo2S4/rGO composites had a smaller size and less agglomeration than the same composites prepared in a traditional stirred reactor (STR). The specific capacity of the MISR-prepared composites was as high as 198.0 mAh g−1under the current density of 1 A g−1. The cycling stability of the composites also improved significantly after being modified with reduced graphene oxide (rGO), and they displayed a fine cycling stability, which maintained a retention rate of 83.6% after 1000 cycles of charging and discharging.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Wenqian Yan,Kunmeng Zhu,Yi Cui,Yanhan Li,Tao Dai,Sheng Cui,Xiaodong Shen
A new material of Ag-SnO 2 /rGO aerogel is fabricated by the sol-gel method and freeze-drying technique. The SnO 2 particles are tightly arranged on the rGO sheets to form a p-n heterojunction , and the rGO aerogel possesses abundant pore structures for effective adsorption. Besides, the Ag particles are dispersed on the surface as a catalyst to improve the internal electron mobility, further promoting the gas-sensing performance. To be noted, the Ag-SnO 2 /rGO aerogel can exhibit a response of 2.13 towards 50 ppm NO 2 at RT instead of heating conditions, and shows a cyclic capacitance property of redox. Moreover, the non-linear growth between gas concentration and response is observed, which proves the chemical adsorption that results in the high selectivity.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Liwen He,Zongmin Li,Yuan He,Xinjie Tao,Bizhou Lin,Jun Chen,Qiao Huang,Dongya Sun
The study of electrochromic materials has far-reaching significance for the regulation of light and heat as well as the reduction of energy consumption. In this study, rGO-Co-NiO composite films were prepared by combining graphene oxide , which has excellent conductivity and stability, with Co-NiO films. The particle size, band gap, conductivity and response time of the electrochromic films were improved by precisely adjusting the component modulation amount of graphene oxide. The results show that with the incorporation of GO it is easy to form oxygen vacancies , which is conducive to ionic conduction and diffusion, in which the film with a GO doping concentration of 4 % has excellent performances in terms of response time and coloring efficiency, and the response time is reduced from 10.2 to 5.8 seconds, and it still possesses 57.25 % of the light modulation amplitude after 600 cycles, of which the attenuation rate is only 2 % for the period from 100 to 600 cycles, The coloring efficiency after 100 cycles is 48.21 cm 2 /C. In summary, the investigated rGO-Co-NiO composite films have a broad potential for future application in electrochromic devices .
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DOI
高影响因子
Materials Research Express
·
2020
·Vol. 7
·期 7
·075501
·
IF 1.929
Dinh Trinh Tran,Van Noi Nguyen
Reduced graphite oxide (rGO) was synthesized from graphene oxide (GO) by reduction process with the aid of ascorbic acid. GO was synthesized from graphite precursor by modified Hummers method. The prepared materials were characterized in terms of surface morphology, structure, functional group, and elemental compositions by different methods such as SEM/EDS, XRD, FT-IR, Raman, and BET. rGO/K2S2O8 system was used to study the impact of different reaction parameters on the degradation of tetracycline in water. The results showed that GO and rGO materials were successfully synthesized, with high purity. The prepared rGO promoted the degradation of tetracycline by sulphate radicals generated from K2S2O8 with an efficiency of two-fold higher than sole K2S2O8. More than 95% of 5 mg l−1 tetracycline were removed by rGO/K2S2O8 system after 40 min of reaction. The catalytic performance of rGO/K2S2O system in the degradation of tetracycline was dependent on pH of the solution, catalyst loading, tetracycline initial concentration, and persulfate concentration. The optimal conditions for the degradation of tetracycline in water were at pH10, with 5 mg l−1 tetracycline initial concentration, 20 mg l−1 of rGO, and 0.2 mM persulfate added. The catalytic performance of the system showed relatively stable, with about 75% tetracycline in solution were removed after 3 cycles. The degradation of tetracycline by rGO/K2S2O8 system followed the pseudo-first order kinetics, with a typical coefficient of determination above 0.95 for all experimental conditions.
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DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Yaoyi Li,Kexin Chen,Xi Wang,Zijun Xiao,Gaozu Liao,Jing Wang,Xukai Li,Yiming Tang,Chun He,Laisheng Li
In this study, reduced graphene oxide (rGO) was used to fabricate a Z-scheme BiVO 4 -(rGO-Cu 2 O) photocatalyst for the degradation of Tetrabromobisphenol A (TBBPA) under sunlight irradiation. The photocatalyst was synthesized using a three-step method BiVO 4 -(rGO-Cu 2 O) photocatalyst with an rGO loading of 1% and (rGO-Cu 2 O) to BiVO 4 ratio of 50% achieved the best degradation effect for TBBPA removal. Electron paramagnetic resonance spectroscopy (EPR) confirmed that the charge transfer path of BiVO 4 -(rGO-Cu 2 O) follows that of Z-scheme photocatalysts. Moreover, the addition of rGO increases the charge transfer efficiency. High performance liquid chromatography-mass spectrometry (HPLC-MS) was used to detect and analyze intermediate products, allowing the proposal of the main degradation pathway of TBBPA. Photogenerated electrons of BiVO 4 -(rGO-Cu 2 O) were then transferred into the conduction band of Cu 2 O. Cu 2 O is located in the surface layer, which has the most effective contact area with pollutants, and therefore has a good outcome for the photocatalytic reduction of TBBPA. Photogenerated electrons (e − ) and hydroxyl radicals (∙OH) are the main factors affecting TBBPA degradation. The degradation process of TBBPA includes electron reduction debromination , hydroxylation , and β-cleavage. In our work, BiVO 4 -(rGO-Cu 2 O) was successfully synthesized to degrade TBBPA; this study brings forth a novel approach for the degradation of halogenated organic pollutants using a Z-scheme photocatalytic composite.
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DOI
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-6
·
IF 4.011
Khan M. Z. H.,Daizy M.,Tarafder C.,Liu X.
In this work, we have successfully synthesized core-shell structured Au-PDA@SiO 2 nanospheres and decorated on reduced graphene oxide (rGO) modified glassy carbon electrode for the electrochemical detection of cefotaxime. The one-pot hydrothermal method was used to synthesis core-shell nanostructures by loading Au nanoparticles on polydopamine (PDA) coated SiO 2 nanospheres. The as-prepared Au-PDA@SiO 2 nanospheres were used to fabricate electrochemically reduced graphene oxide (rGO) modified glassy carbon electrode (Au-PDA@SiO 2 /rGO/GCE) for electrochemical determination of cefotaxime. Scanning electron microscopy, powder x-ray diffraction, transmission electron microscopy, and Fourier-transform infrared spectroscopy were used to confirm the structure and morphology of the as-prepared nanospheres. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were performed for electrochemical characterizations different modified electrodes. It was revealed that the nanocomposite modified electrodes exhibited excellent electrochemical performances for electrooxidation of target analytes and could achieve ultra-sensitive detections. A linear relationship was observed between peak currents and concentrations in the ranges of 1.0 × 10 −9 to 5.0 × 10 −8 M ( R 2 = 0.9877), and 1.0 × 10 −7 to 5.0 × 10 −6 M ( R 2 = 0.9821) for cefotaxime with a detection limit (S/N = 3) of 1.0 × 10 −10 M. It can be deduced that the proposed sensor is suitable for the sensitive detection of cefotaxime in pharmaceutical samples.
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DOI
高影响因子
Heliyon
·
2024
·
IF 3.4
Chenhan Lv,Haixiang Cheng,Rui Fan,Jingyu Sun,Xinghai Liu,Yinghui Ji
Organic fluorine compounds are acute carcinogenic and mutagenic to humans. Photoelectrocatalysis (PEC) treatment is an innovative technology in the field of the removal of fluorine compounds, and thus current research focused on improving stability and catalytic ability of photoanode. In this study, it has been synthesized a rGO/BiOI photocathode for the efficient degradation of 4-Fluoroaniline (4-FA). The physical characterization and photoelectrochemical properties of the photocathode was determined. The results indicate that the PEC treatment with the rGO/BiOI photocathode was more efficient compared with individual processes. During the optimization experiments, the PEC treatment achieved 99.58 % and 72.12 % of 4-FA degradation and defluorination within 1 h. Cyclic stability experiments show that rGO/BiOI photocathode was efficient and stable, which reached 96.91 % and 67.64 % of 4-FA degradation and defluorination after five cycles. Mechanism analysis indicates that the PEC process was based on an electrochemical reaction and photo-induced processes. The degradation product of 4-FA was mainly 2,4-di-t-butylphenol, and trapping experiments indicates that h + is the primary oxidizing species. Therefore, PEC treatment with rGO/BiOI photocathode is a competitive green approach to remove fluorine compounds pollutants and brings new insights into development of PEC treatment.
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Cheng Zi,Jingji Zhang,Lingling Ren,Huanan Yu,Huifang Gao,Senlin Jin,Yaxuan Yao,Xu Li,Zhili Jia
Carbon-based materials hold significant potential for electromagnetic absorption applications, however, the development of effective discrete dual-band absorbers remains a formidable challenge. In this study, we synthesized BaTiO₃@reduced graphene oxide (BTO@rGO) composite aerogel via ascorbic acid-assisted thermal reduction, enhanced by a freeze-thaw treatment. This treatment induces a bimodal mesoporous structure, with pore size centered at 2.2 nm and 3.9 nm, which significantly boosts the aerogel’s specific surface area of 15.95 m² g⁻¹ . Additionally, the freeze-thaw process enriches the rGO with defect dipoles and reduces the Ba 2 + content on the surface sites. These structural and compositional features synergistically contribute to the composite’s discrete dual-band absorption characteristic. Specifically, the composite achieves minimum reflection loss values of −13.8 dB in the C-band (4.7–5.7 GHz) and −20.7 dB in the Ku-band (15.4–17.6 GHz) at a thickness of 5.0 mm, which aligns well with the quarter-wavelength theory. This innovative structural design strategy, which transforms single-frequency absorbers into dual-frequency absorbers, offers a novel and effective approach for developing advanced dual-frequency absorbing materials.
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产品关联
DOI
高影响因子
CARBON
·
2025
·
IF 11.6
Xianghong Li,Yuan Shu,Tingkai Zhao,Jalil abdul,Haoxin Duan,Muyang Ma,Tao Jiang,Yanzong Liu
Electromagnetic functional materials are playing an increasingly vital role in electromagnetic interference shielding, stealth protection, and information security. Carbon nanotubes (CNTs), owing to their unique structure and outstanding electromagnetic properties, have attracted widespread attention. Here, a 3D Co/CoO/RGO/CNT crosslinked heterostructure was fabricated by in-situ growth of CNTs on Co(CO 3 ) 0 · 5 (OH)·0.11H 2 O precursors that were crosslinked with reduced graphene oxide through a combined hydrothermal and chemical vapor deposition strategy. The resulting interconnected conductive heterostructures significantly enhanced electron transport, interfacial polarization, and impedance matching. Notably, the optimized composites achieved a minimum reflection loss of −23.95 dB with an effective absorption bandwidth of 4.2 GHz (at 10 wt% filler loading and 2.17 mm thickness), fully covering the X-band. Furthermore, the study of heterointerfaces between different components and their underlying loss mechanisms provides critical insights into the electromagnetic wave absorption behavior and guides the rational design of advanced structural materials. Density functional theory simulations were also employed to investigate the electronic structure and charge distribution at the Co–CoO and Co–CNT interfaces. The simulation results reveal that charge redistribution and the formation of interface dipoles contribute to enhanced dielectric and magnetic losses, offering a microscopic explanation for the superior microwave absorption performance.
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产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2025
·
IF 4.7
Jianghao Gan,Jinlin Fan,Zongyu Huang,Hui Qiao,Pinghua Tang,Xiang Qi
Two-dimensional transition metal carbides (MXene) show great promise for use in flexible optoelectronics, but they are prone to rapid oxidation and nanosheet restacking, which can degrade the device performance and longevity. In this study, we address this issue by creating a dual-network conductive hydrogel made up of Ti2CTx MXene and reduced graphene oxide (rGO). The rGO nanosheets act as conductive spacers, preventing the restacking and oxidation of the Ti2CTx nanosheets while enabling charge transport. The resulting Ti2CTx/rGO composite hydrogel achieves an impressive photocurrent density of 0.375 μA cm–2 under a 0.4 V bias and 120 mW cm–2 of illumination. This is 68.2% higher than that of a pure MXene hydrogel (0.223 μA cm–2). Furthermore, the composite demonstrates outstanding mechanical and environmental stability. It retains 79.2% of its photocurrent under 200% tensile strain compared to 53.8% for the pure MXene system and exhibits only a 40% decrease in photocurrent after 15 days, significantly outperforming the 70% decay observed in the control device. This work provides an effective strategy for developing stable, high-performance MXene-based hydrogels for advanced, wearable, optoelectronic applications.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）