ChemSusChem
·
2019
·Vol. 12
·期 18
·4160-4164
·
IF 7.804
Yan Zhang,Huinan Guo,Weiqin Li,Yike Huang,Zeting Zhang,Guishu Liu,Yijing Wang
Graphical Two in one : A composite of a calcium organic salt, Cabpdc (bpdc=4,4′-biphenyldicarboxylate) and reduced graphene oxide (rGO) improves two issues related to organic electrodes: high solubility in organic electrolytes and low electronic conductivity. The Cabpdc/rGO composite displays competitive cycle and rate performances as an anode for sodium-ion batteries. Organic electrodes hold great promise for sustainable electrodes in sodium-ion batteries (SIBs) owing to their easy availability from biomass. However, traditional organic electrodes suffer from two inherent problems, high solubility in organic electrolytes and low electronic conductivity. Here, a calcium organic salt, Cabpdc (bpdc=4,4′-biphenyldicarboxylate) was designed and formed into a composite with reduced graphene oxide (rGO) to improve these two problems by a “two-in-one” approach. As expected, the Cabpdc/rGO composite displayed competitive cycle and rate performances as an anode for SIBs. Additionally, all-organic sodium-ion full cells were successfully fabricated combining this anode with a commercial organic cathode, promising applications for sustainable SIBs.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Xiufen Hu,Fang Deng,Weiya Huang,Guisheng Zeng,Xubiao Luo,Dionysios D. Dionysiou
ZnS-MoS 2 solid solution anchored on reduced graphene oxide sheet (rGO/ZnS-MoS 2 ) was explored as novel visible-light-driven photocatalysts, and synthesized by solvent thermal method. The light absorption intensity of rGO/ZnS-MoS 2 was greatly strengthened, and rGO/ZnS-MoS 2 possess modulated continuous band gaps from 3.47 to 3.56 eV by changing the Zn/Mo ratios and rGO content. Their photocatalytic activities for 2-nitrophenol degradation are dependent on the chemical composition, and the optimal 11% rGO/ZnS-MoS 2 possessed the highest photocatalytic performance, which could be attributed to the most efficient charge separation, the largest specific area, and its optimized band structure. Moreover, 11% rGO/ZnS-MoS 2 can effectively treat real industrial effluent with 74.05% COD removal, and maintain long-term stability without obvious decline after five use cycle.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2018
·
IF 6.653
Haiguang Zhang,Xie Quan,Shuo Chen,Xinfei Fan,Gaoliang Wei,Hongtao Yu
Nanofiltration (NF) has received much attention for wastewater treatment and desalination. However, NF membranes generally suffer from the trade-off between permeability and selectivity. In this work, the coenhancement of permeability and ion selectivity was achieved through tuning the surface charge and pore size of oxidized carbon nanotube (OCNT) intercalated reduced graphene oxide (RGO) membranes. With the increase of OCNT content from 0 to 83%, the surface charge and the pore size were increased. The permeability increased to 10.6 L m–2 h–1 bar–1 and rejection rate reached 78.1% for Na2SO4 filtration at a transmembrane pressure of 2 bar, which were 11.8 and 1.3 times higher than those of pristine RGO membrane. The composite membrane also showed 11.1 times higher permeability (11.1 L m–2 h–1 bar–1) and 2.9 times higher rejection rate (35.3%) for NaCl filtration. The analyses based on Donnan steric pore model suggest that the increased permeability is attributed to the combined effects of enlarged pore size and increased surface charge, while the enhanced ion selectivity is mainly dependent on the electrostatic interaction between the membrane and target ions. This finding provides a new insight for the development of high-performance NF membranes in water treatment and desalination.
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CHEMICAL PHYSICS LETTERS
·
2018
·
IF 1.686
Hao Jiang,Xia Zhang,Wen Gu,Xiaoqian Feng,Lei Zhang,Yijin Weng
Novel ZnO particles with hierarchical and biomorphic porous microstructures were first synthesized through a bionic method and the individual ZnO, pine cones-like ZnO/rGO composites were prepared via ‘one-pot’ solvothermal route. All of above samples are characterized by SEM, XRD, Raman spectrometer and XPS. The results of degradation of rhodamine B indicated that ZnO/leaf exhibited better photocatalytic properties than individual ZnO, the ZnO/rGO with ZnO/rGO ratios at 20:1 shows the best photocatalytic performance. Results indicate that both the morphology design of ZnO through a bionic method and graphene doping can enhance the photocatalytic performance of zinc oxide.
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IONICS
·
2019
·Vol. 26
·期 2
·777-787
·
IF 2.289
Jing Pengcheng,Lu Huimin,Yang Wenwen,Cao Yuan,Xu Binbin,Cai Wei,Deng Yan
Magnesium batteries based on Mg 2+ /Li + dual ion electrolytes (MLIBs) have attracted increasing attention due to fast Li + or Mg 2+ /Li + insertion kinetics, abundant Mg resources, and high volumetric capacity of dendrite-free Mg anodes. Herein, we report polyaniline (PANI)–coated VS 4 @reduced graphene oxide (rGO) with nanostructures synthesized via hydrothermal synthesis and subsequent PANI polymerization as the cathode material for MLIBs. The PANI layer serves as a conductive medium to enhance electron transfer and Mg 2+ /Li + transportation as well as to mitigate the structure changes of VS 4 during the cycling process. Indeed, this material demonstrates enhanced electrochemical performance with a high discharge capacity of 200.7 mAh g −1 after 20 cycles and 91.2% retention after 50 cycles. Mechanism analysis reveals that Li + insertion into VS 4 produced an amorphous VS 4 host in the first discharge, which inclined to store Mg 2+ rather than Li + in the subsequent cycles. Our study provides new insights into the development of amorphous electrode materials for magnesium batteries.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Ying-Hua Zhou,Suqin Wang,Yu Wan,Jingjing Liang,Yu Chen,Shizhong Luo,Cheng Yong
Low-cost metallic nanoparticles as catalysts with good performance are highly desired for the development of hydrogen storage materials . In this work, ceria-doped CuNi nanoparticles were successfully immobilized on the surfaces of reduced graphene oxide (rGO) by a simple co-reduction approach in aqueous solution at room temperature, characterized by ICP-OES, XRD , TEM, SEM-EDS and XPS techniques. The as-synthesized CuNi-CeO 2 /rGO nanocomposites with various metal contents had been employed as heterogeneous catalysts for the hydrolytic dehydrogenation of ammonia borane (NH 3 BH 3 , AB) under mild conditions. The optimal catalyst of Cu 0.8 Ni 0.2 -CeO 2 /rGO with CeO 2 content of 13.9 mol% exhibited an excellent catalytic activity with the exceedingly high TOF value of 34.4·mol H2 ·mol catalyst −1 ·min −1 at 298 K. The apparent activation energy was calculated to be 19.1 kJ mol −1 , even lower than most of noble-metal-based catalysts for AB dehydrogenation. The detailed kinetics of AB hydrolysis catalyzed by Cu 0.8 Ni 0.2 -CeO 2 /rGO had been investigated on different concentrations of catalyst, substrate and temperatures. Moreover, the obtained in situ hydrogen from AB hydrolysis can be further applied to reduce 4-nitrophenol with a high TOF value of 8.1 min −1 at room temperature. The high catalytic activity of Cu 0.8 Ni 0.2 -CeO 2 /rGO would be contributed to the small size of CuNi-CeO 2 NPs, metal-metal synergy, and the metal-support interaction.
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MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Yiting Lei,Bingjie Pan,Gaiping Li,Lina Zou,Qi Shen
Residues of oxytetracycline (OTC) may cause the resistance of bacteria, and even have serious impacts on the ecosystem through the food chain. It was important to monitor OTC of low concentration for preserving human health and environmental safety. In this work, reduced graphene oxide doped ZnIn 2 S 4 (ZnIn 2 S 4 /rGO) nanocomposites were composited by straightforward one-step solvothermal reaction. The nanocomposites had superior light absorption property and stable photocurrent response. Because rGO not only had a large specific surface area for immobilizing abundant ZnIn 2 S 4 , but also accelerated charge transfer as an electron mediator. Additionally, the oxidation potential of OTC was more negative than the valence band potential of ZnIn 2 S 4 . So, OTC can be oxidized by photogenerated holes of the ZnIn 2 S 4 as electron donors, leading significant increase of photocurrent response. Based on this, a “signal-on” photoelectrochemical (PEC) sensor was constructed to achieve ultra-sensitive and specific detection of OTC. This sensor exhibited a wide detection range from 100 fM to 50 nM, an extremely low detection limit (61.2 fM) and excellent analytical performance in actual water, food and biological samples.
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Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-17
·
IF 36.3
Li Mengxiao,Li Rui,Ma Huige,Yang Mingsheng,Dai Yujie,Yu HaiPing,Hao Yuxin,Wang Zhihui,Wang Bei,Hu Mingjun,Yang Jun
An integrated conjugated microporous polymer composite electrode (C 4 N/rGO) with high conductivity, large specific surface area and good solvent resistance was prepared by in-situ growth.
An antifreeze alkaline electrolyte (0.1 DMSO/2 M NaOH) was developed to broaden the operation temperature zone and voltage window of the aqueous alkaline battery.
The prepared aqueous alkaline battery exhibits a high energy density (147.3 Wh Kg −1 at 25 °C), outstanding long cycling stability and excellent wide-temperature-range performance (−70 to 45 °C).
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Xiaohong Tan,Wenzhan Li,Wei He,Tingting Yu,Bingbing Wan,Yong Huang,Jintao Liang,Guiyin Li
Glypican-3 (GPC3), which is a surface heparan sulfate proteoglycan, has been widely known the ideal biomarker for diagnosis and treatment of hepatocellular carcinoma (HCC). Accurate and sensitive detection of serum GPC3 level is an important and challenging task. In this paper, a sandwich electrochemical aptasensor was designed to specifically detect serum GPC3 level through aptamer-target-aptamer recognition. A GPC3 aptamer (GPC3 Apt ) immobilized on the surface of gold nanoparticles@reduced graphene oxide modified screen-printed electrode (Au NPs@rGO/SPCE) was used as the capture probe. Hemin-reduced graphene oxide-carboxymethyl chitosan@platinum nanoparticles (H-rGO-CMC@Pt NPs), with good mimicking peroxidases activity, were labeled with amination GPC3 aptamer, which was employed as the signal probe. Once the target GPC3 was anchored on the surface of GPC3 Apt /Au NPs@rGO/SPCE, the H-rGO-CMC@Pt NPs-GPC3 Apt was further specifically bound to the GPC3, forming the aptamer-target-aptamer sandwich structure, which can catalyze the oxidation of hydroquinone (HQ) to benzoquinone (BQ) and lead the oxidation current of HQ recorded by DPV to changing. The linear relationship between the current signal of oxidation of HQ and GPC3 concentration range of 0.0001–3.0 µg/mL and 3.0–60.0 µg/mL, with a low detection limit (LOD) of 0.0685 ng/mL. Additionally, the electrochemical aptasensor was successfully applied for the detection of GPC3 in human serum samples with the recovery of 99.95–104.06 % and relative standard deviation (RSD) of 1.31–5.22 %. Thus, the sandwich aptasensor could provide a new strategy for detection of serum GPC3 level and improve the early diagnosis rate of HCC.
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RSC Advances
·
2015
·Vol. 5
·期 83
·67951-67961
·
IF 3.84
Jin Zhu,Zimo Lou,Yu Liu,Ruiqi Fu,Shams Ali Baig,Xinhua Xu
Iron–manganese binary oxide (FeMnOx) is considered highly effective for arsenic adsorption, however, the agglomeration effect hindered its practical application. In this study, graphene has been used as a supporting matrix to disperse FeMnOx due to its huge specific surface area, and the synthesized novel composite adsorbent (FeMnOx/RGO) was employed for arsenic removal. Results demonstrated that FeMnOx/RGO (mass ratio of FeMnOx to FeMnOx/RGO nanocomposites is 45%) has larger specific surface area (411 m2 g−1) in comparison with bare FeMnOx, and showed 10.16 mg As g−1 FeMnOx and 11.49 mg As g−1 FeMnOx adsorption capacities for As(III) and As(V), respectively, with 1 mg L−1 initial concentration. Increased in the initial concentration to 7 mg L−1, the adsorption capacities of As(III) and As(V) reached to 47.05 mg As g−1 FeMnOx and 49.01 mg As g−1 FeMnOx, respectively. The removal process perfectly obeys pseudo second-order kinetic model for both As(III) and As(V). And PO43− was found to strongly inhibit arsenic adsorption. Furthermore, adsorption tests and characterization analyses confirmed that MnO2 played a key role on the oxidation of As(III), while iron(III) oxide was found crucial to As(V) removal. Electrostatic interaction and surface complexation mechanisms involved in the adsorption. These findings suggested that the adsorbent could be used in real arsenic-contaminated water treatment.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yutai Wang,Qunyi Wang,Xiaoyan Zhou,Puguang Ji,Gongkai Wang,Chengwei Zhang,Mengxiao Sun,Mirtemir Shodievich
Because of the unique ability to combine high energy density with high power density, lithium-ion hybrid capacitors (LICs) have generated significant interest. Among the various anodes being explored for LICs, silicon (Si) stands out as a particularly promising anode material due to its high theoretical capacity. Nevertheless, the formidable challenge lies in the rapid capacity fade resulting from substantial volume expansion. Herein, a simple and efficient spray drying technique was used to fabricate a Si@rGO@NC composite with micro-nano structure. In this composite, Si nanoparticles are encapsulated between reduced graphene oxides (rGO) hollow spheres and a layer of carbon is coated on the surface of both the Si and the micron-sized composite particles, forming a rigid and mechanically stable structure. The composite combines the high activity of nano-Si with the industrially easy handling of micron-scale particles. Moreover, the rGO hollow spheres not only enhance the electrical conductivity but also buffer the volume expansion of the electrode and provide channels for the rapid transport of electrolyte/ions. Thanks to its advantageous structural features, the constructed LICs with activated carbon as cathode can achieve a Max. energy/power density of 253.1 Wh kg −1 /10,824.1 W kg −1 and maintain 84.3 % of its initial capacitance after 8000 cycles. The micro-nano structured design concept of Si-based materials developed in our work could offer new insights and directions for the future development of Si-based energy storage devices.
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CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Yidi Wang,Bowen Li,Guanshu Li,Xue Ma,Hongbo Zhang,Yingying Huang,Guowei Wang,Jun Wang,Youtao Song
Z-scheme structure is an effectively construction to improve the photocatalytic activity due to the excellent photo-generated electron-hole pairs separation efficiency. In this paper, the Er 3+ :YAlO 3 @(PdS/BiPO 4 )/(Au/rGO), (Au/rGO)/CdS and modified Z-scheme Er 3+ :YAlO 3 @(PdS/BiPO 4 )/(Au/rGO)/CdS photocatalysts were prepared by hydrothermal, ultrasonic dispersion, deposition-precipitation and ultrasonic-assisted methods. The prepared samples were characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectra (DRS), fourier transform infrared spectra (FT-IR), raman spectra and photoluminescence (PL) spectra. The photocatalytic activity of prepared samples were evaluated via photocatalytic conversion rate of nitrite under ultraviolet-light and simulated solar-light irradiations. Due to the enhanced separation efficiency of electron-hole pairs, the Er 3+ :YAlO 3 @(PdS/BiPO 4 )/(Au/rGO)/CdS exhibited excellent performance under both ultraviolet-light and simulated solar-light irradiation, reaching 94.59% and 91.25% conversion rates, respectively. Meanwhile, the effects of simulated solar-light irradiation time and corresponding reaction kinetics on photocatalytic conversion of nitrite were studied. Subsequently, the effects of electron and hole scavengers were investigated to further elaborate the possible mechanism. In addition, the study of used times showed that the prepared modified Z-scheme Er 3+ :YAlO 3 @(PdS/BiPO 4 )/(Au/rGO)/CdS nanocomposites can be effectively recycled without an apparent inactivation on photocatalytic activity. This research may provide a potential way by utilizing solar energy efficiently for converting nitrite and other contaminants released into the environment.
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