SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Weirong Zhou,Guoxuan Gu,Chao Liao,Yuan Gao,Jiayin Han,Dehao Kong,Yubing Gao,Zhangjun Wang,Ning Yu,Geyu Lu
Detecting trace levels of hazardous gas nitrogen dioxide (NO 2 ) at low temperatures still remains a persistent challenge. In this work, CeO 2 nanooctahedrons, nanorods and nanocubes with different exposed facets were synthesized and subsequently decorated with rGO. The NO 2 sensing properties of three CeO 2 nanocrystals-rGO nanocomposites at 65 ℃ were systematically investigated. CeO 2 nanocubes-rGO with (100) exposed plane showed superior sensing performance with eminent selectivity, long-term stability and low limit of detection (75 ppb). The results of characterizations and DFT calculations indicated the presence of abundant oxygen vacancies on (100) plane, due to the low formation energy of oxygen vacancy. Besides, the nature of polar plane and low adsorption energy on defective (100) plane promoted the adsorption of NO 2 on CeO 2 nanocubes-rGO nanocomposites. The decoration of rGO improved the electrical conductivity of CeO 2 , established the heterojunction and generated additional oxygen vacancies on the heterointerfaces. Therefore, the outstanding NO 2 sensing characters of CeO 2 nanocubes-rGO could be attributed to the polar exposed planes, abundant oxygen vacancies and plentiful interfacial heterojunctions. The present approach sheds light on the rational design of sensing materials via facet- and defect-engineering, and developed a CeO 2 -based NO 2 sensors with a low working temperature for environmental monitoring and safety assurance.
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DOI
高影响因子
IONICS
·
2019
·Vol. 25
·期 10
·4675-4684
·
IF 2.289
Zhang Peng,Ru Qiang,Gao Yuqing,Yan Honglin,Hou Xinhua,Chen Fuming,Hu Shejun,Zhao Lingzhi
Novel porous nano-silicon/TiO 2 /rGO@carbon anodes with superior lifespan and desirable cycling stability are prepared by a step-wise synthetic procedure. The hybrid exhibits a high specific capacity of 1073.43 mAh g −1 at a current density of 500 mA g −1 . Additionally, it delivers a reversible capacity of 724.08 mAh g −1 at 1000 mA g −1 even after 1000 long-term cycles. Simultaneously, a large average capacity is reinstated after cycling at high rates, such as 994.76, 743.33, and 599.70 mAh g −1 at 1000, 2000, and 3000 mA g −1 , respectively. The greatly ameliorative electrochemical characteristics could be attributed to the abundant buffering space of hierarchical architecture, good separation of mechanically robust anatase-TiO 2 , sustainable confinement of elastic carbon skeletons, as well as improved electrical conductivity of rGO, which could suppress drastic volume variations and promote multiple Li + /electron transport without distinct pulverization.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 5
·1858-1864
·
IF 3.288
Zongkai Wu,Jiangfeng Pei,Xiuduo Song,Ning Liu,Jianguo Li,Ming Zhang,Jun Zhang,Dongxiang Zhang,Fengqi Zhao
The DSC-TG-MS-FTIR coupling technique and in situ FTIR technique were used to study the catalytic effects of nano-Fe2O3 and rGO–Fe2O3 on the thermal decomposition behaviors of CL-20/HMX cocrystals. The results showed nano-Fe2O3 having a good catalytic effect on the thermal decomposition of the CL-20/HMX cocrystal. Nano-Fe2O3 was found to enhance CO2 production and prevent the production of NH2+, HCN, and CHO or N2H+ during the decomposition of cocrystalline CL-20/HMX. Meanwhile, both the CL-20/HMX thermal decomposition peak temperature and Ea were reduced by including nano-Fe2O3. The inclusion of rGO–Fe2O3 did not enhance the catalytic effect of nano-Fe2O3, but did reduce residue formation during the CL-20/HMX decomposition process. Breaking of N–N bonds and the release of NO2 were concluded to constitute the initial steps of the decomposition of the CL-20/HMX cocrystal. This investigation has contributed to our understanding of the thermal decomposition of the CL-20/HMX cocrystal and provides guidance for the catalytic decomposition of energetic material cocrystals.
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高影响因子
RSC Advances
·
2019
·Vol. 9
·期 56
·32517-32534
·
IF 3.049
Manoj Pudukudy,Qingming Jia,Yanan Dong,Zhongxiao Yue,Shaoyun Shan
A series of magnetically separable rGO/Fe3O4 nanocomposites with various amounts of graphene oxide were successfully prepared by a simple ultrasonication assisted precipitation combined with a solvothermal method and their catalytic activity was evaluated for the selective liquid phase oxidation of cyclohexene using hydrogen peroxide as a green oxidant. The prepared materials were characterized using XRD, FTIR, FESEM, TEM, HRTEM, BET/BJH, XPS and VSM analysis. The presence of well crystallized Fe3O4 as the active iron species was seen in the crystal studies of the nanocomposites. The electron microscopy analysis indicated the fine surface dispersion of spherical Fe3O4 nanoparticles on the thin surface layers of partially-reduced graphene oxide (rGO) nanosheets. The decoration of Fe3O4 nanospheres on thin rGO layers was clearly observable in all of the nanocomposites. The XPS analysis was performed to evaluate the chemical states of the elements present in the samples. The surface area of the nanocomposites was increased significantly by increasing the amount of GO and the pore structures were effectively tuned by the amount of rGO in the nanocomposites. The magnetic saturation values of the nanocomposites were found to be sufficient for their efficient magnetic separation. The catalytic activity results show that the cyclohexene conversion reached 75.3% with a highest 1,2-cyclohexane diol selectivity of 81% over 5% rGO incorporated nanocomposite using H2O2 as the oxidant and acetonitrile as the solvent at 70 °C for 6 h. The reaction conditions were further optimized by changing the variables and a possible reaction mechanism was proposed. The enhanced catalytic activity of the nanocomposites for cyclohexene oxidation could be attributed to the fast accomplishment of the Fe2+/Fe3+ redox cycle in the composites due the sacrificial role of rGO and its synergistic effect with Fe3O4, originating from the conjugated network of π-electrons in its surface structure. The rapid and easy separation of the magnetic nanocomposites from the reaction mixture using an external magnet makes the present catalysts highly efficient for the reaction. Moreover, the catalyst retained its activity for five repeated runs without any drastic drop in the reactant conversion and product selectivity.
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PubMed
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 47
·18524-18531
·
IF 8.262
Mengjie Feng,Shubin Wang,Jiping Yang,Boming Zhang
As one of the most promising structural anode materials, carbon fibers (CF) have gained much attention. One of the central problems in their application is retaining their tensile strength and simultaneously improving their electrochemical properties. Herein, we report reduced graphene oxide/SnO2@carbon fibers (rGO/SnO2@CF) with wrinkled surfaces, fabricated via a simple hydrothermal method followed by heat treatment. This material exhibits prominent tensile properties, improved reversible capacity, excellent cycling stability and significantly enhanced first cycle coulombic efficiency. Compared to the reversible capacity at the 20th cycle, the rGO/SnO2@CF retained 93.6% reversible capacity after 100 cycles at 50 mA g−1, corresponding to a capacity fading of only 0.08% per cycle. The Weibull scale parameter and shape parameter of rGO/SnO2@CF were up to 4.63 GPa and 7.87, respectively. Our measurements revealed that the positive influence of rGO effectively countervailed the negative influence of the hydrothermal process on the tensile strength; the interleaved structure of rGO/SnO2 prevented the dispersion degree of tensile strength from decreasing; the synergistic effect of rGO and SnO2 enhanced the properties of the carbon fibers, including the tensile strength and the electrochemical properties; the formed rGO network structure and bicontinuous electronic transport pathway are in favor of the cycling stability.
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高影响因子
BIOSENSORS & BIOELECTRONICS
·
2013
·
IF 5.437
Bing Sun,Lijian Chen,Yan Xu,Min Liu,Huanshun Yin,Shiyun Ai
A novel ultrasensitive photoelectrochemical immunosensor was fabricated based on 3-mercaptopropionic acid stabilized CdS/reduced graphene oxide (MPA-CdS/RGO) nanocomposites for indole-3-acetic acid (IAA) detection. The MPA-CdS/RGO nanocomposites were synthesized by in situ solvothermal growth of triangulated pyramidal CdS nanoparticles on the RGO sheet. 3-Mercaptopropionic acid (MPA) was employed as the modifier and bridge to immobilize the antibody. The nanocomposites were characterized by X-ray diffraction, transmission electron microscopy , scanning electron microscopy and UV/vis spectra. The results showed that the MPA-CdS/RGO nanocomposites revealed enhanced photocurrent response due to excellent electron transport properties of RGO and the improved assembly of CdS nanoparticles onto RGO sheet with the introduction of MPA. Based on the dependence of the photocurrent decline on the concentration of IAA, the proposed photoelectrochemical immunosensor for IAA depicted a linear range from 0.1 to 1000 ng/mL with a lower detection limit (0.05 ng/mL). The high sensitivity, reproducibility and specificity of the method permitted the method suitable to be used in real samples.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Kun Liu,Chaoyang Shi,Juan Yu,Enze Zhu,Zhimin Li,Chengxu Zhang,Wei Li,Xikun Yang,Yingjie Zhang,Mingli Xu
Transition metal-based compounds, due to their excellent ORR catalytic performance under alkaline condition, have recently emerged as one of the most promising alternatives to noble metal-based ORR catalysts. It is worth noting that manganese oxide can take an unique advantage for decomposition of intermediate adsorption products H 2 O 2 and can effectively reduce O 2 to OH − . However, most research has focused on MnO 2 , while attention has rarely been paid to MnO catalysts. In addition, under high-temperature pyrolysis condition, MnO is the most stable manganese oxide but MnO nanoparticles easily agglomerate. Hence, it is very difficult to obtain well-dispersed and small-sized MnO nanoparticles. Herein, on the basis of pre-synthesizing uniformly distributed manganese complexes on the reduced graphene oxide (rGO), we innovatively prepare highly dispersed and small-sized MnO nanoparticles (~3.94 nm) via high-temperature pyrolysis, which are uniformly anchored on N-doped reduced graphene oxide (NrGO) as an efficient oxygen reduction electrocatalyst . The as-obtained MnO/NrGO (1050 °C) electrocatalyst achieves satisfactory onset potential (0.942 V) and half-wave potential (0.820 V) under alkaline condition. And the limiting current density is 4.17 mA cm −2 , which is very close to that of Pt/C (20 wt%, JM). Meanwhile, MnO/NrGO (1050 °C) catalyst presents superior longstanding durability and methanol resistance than Pt/C (JM). This work indicates that high-temperature pyrolysis can improve the purity of manganese oxide, simultaneously the defects of NrGO can reduce particle size of MnO nanoparticles, which are greatly beneficial to improve ORR performance. This work provides a new idea for research of MnO catalysts for ORR in the future.
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高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Jinlong Li,Hong Zhou,Shuo Huang,Xin Gao,Qinhan Liu,Shuai Zhang,Hang Su,Haopeng Zhang,Hongyan Yue
Low conductivity and slow reaction kinetics are partly responsible limiting the sensing performance of metal-organic-framework (MOF) derived metal oxides, which can be overcome by rational composition and novel microstructural design. In this study, hollow dandelion-like Ce-Zn MOF/reduced graphene oxide (rGO) nanosheets precursor were synthesized by solvothermal reaction and the precursor was annealed to obtain CeO 2 -ZnO/rGO (CZO/rGO). The effects of polyvinylpyrrolidone (PVP), rGO and annealing temperature on its morphology and sensing properties were investigated. The unique morphology of CeO 2 -ZnO provides abundant active sites and large specific surface areas which can improve the ion diffusion efficiency, and the high conductivity of rGO reduces the interfacial resistance and improves the electron transfer rate. The optimized CZO/rGO/ITO electrode achieves a high sensitivity of 17.67 μA·μM -1 ·cm -2 and a limit of detection of 2.1 nM (S/ N = 3) for dopamine (DA) detection. This study broadens the application of MOF derivatives in DA sensing.
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Zhiwei Zhou,Junyan Chen,Haikuan Yu,Yuantian Zhao,Xing Li,Jiawei Ren
Secondary effluent organic matter (EfOM) significantly contributes to membrane fouling in ultrafiltration (UF) systems, which limits their broader use in municipal wastewater recycle. A modified ceramic ultrafiltration membrane (MCUM) was synthesized via vacuum filtration and thermal treatment and then activated under ultraviolet (UV) irradiation. The results indicated that the MCUM-2.88 exhibited the most excellent removal of EfOM, effectively retained high molecular weight (MW) proteinaceous substances, and converted medium MW humic-like compounds into lower MW derivatives. Through parallel factor analysis in conjunction with the self-organizing map algorithm, it was observed that the MCUM primarily degraded aromatic, high MW fluorescent components, while tryptophan-like substances remained as dominant residues due to their resistance to photodegradation. Additionally, the improved surface roughness and hydrophilicity of the MCUM facilitated fouling mitigation by strengthening interfacial repulsion, which diminished foulant adhesion. The fouling mechanism transitioned from complete and intermediate blocking to predominantly intermediate blocking, accompanied by a reduction in gel layer fouling. Consequently, the reversible fouling resistance of the MCUM was reduced by 76.8 %, and the irreversible resistance by 34.3 %, markedly enhancing antifouling performance. The results underscore the effectiveness of MCUM in advanced municipal wastewater treatment, showcasing enhanced antifouling performance and strong potential for sustainable water reuse applications.
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产品关联
DOI
高影响因子
WATER RESEARCH
·
2025
·
IF 12.4
Tong Liu,Qiao Hou,Xiangcun Li,Yan Dai,Wu Xiao,Gaohong He
Solar-driven interfacial evaporation has emerged as a prominent sustainable desalination technology due to its clear energy utilization and low operational costs. However, developing evaporators with high efficiency, structural stability, and salt-resistant properties remains a critical challenge. Herein, we designed an rGCW x @PVDF-PVP membrane fabricated via a facile phase inversion strategy, demonstrating exceptional solar evaporation performance and cyclic stability. The synergistic integration of rGO-xW 18 O 49 nanoplates (W 18 O 49 nanowires anchored on rGO surface) and CNTs enables broadband spectral absorbance (∼90.00%). The hierarchically porous PVDF-PVP membrane facilitates rapid water transport and provides substantial vapor escape channels. Notably, the incorporation of PVP with nitrogen-containing functional groups modulates water molecule interactions by weakening hydrogen bonding networks, and PVP effectively reduces the evaporation enthalpy of the water system and improves evaporation performance. Under 1 sun irradiation, the evaporator achieves an outstanding evaporation rate of 2.09 kg m −2 h −1 with a photothermal conversion efficiency of 92.80%. Remarkably, the evaporator maintains terrific performance in desalination without surface salt crystallization, demonstrating exceptional anti-fouling capability during prolonged operation. This novel and simple thin-film evaporator presents a broad prospect in the field of interfacial evaporation, offering a practical strategy for sustainable water purification and global freshwater scarcity.
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产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2021
·Vol. 33
·期 40
·2103999
·
IF 30.849
Binshuai Wang,Shudong Zhang,Jingxin Meng,Li Min,Jing Luo,Zhongpeng Zhu,Han Bao,Ruhua Zang,Shaohui Deng,Fan Zhang,Lulin Ma,Shutao Wang
The prostate-specific antigen (PSA) has been widely used for the early diagnosis of prostate cancer during routine check-ups. However, the low sensitivity of regular PSA tests in the PSA gray zone often means that patients are required to undergo further invasive needle biopsy for the diagnosis of prostate cancer, which may lead to potential overdiagnosis and overtreatment. In this study, a circulating tumor cell (CTC)-chip based on an evaporation-induced reduced graphene oxide (rGO) coating is presented, which enables a highly specific and non-invasive diagnosis of prostate cancer in the PSA gray zone. During the evaporation process of the rGO dispersion, the Marangoni effect induces the self-assembly of a hierarchical micro/nanowrinkled rGO coating, which can capture CTCs after subsequent surface modification of capture agents. Compared to the low diagnostic sensitivity (58.3%) of regular PSA tests, a combination of CTC detection and PSA-based hematological tests via machine-learning analysis can greatly upgrade the diagnostic sensitivity of this disease to 91.7% in clinical trial. Therefore, this study provides a non-invasive alternative with high sensitivity for the diagnosis of prostate cancer in the PSA gray zone.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Ying Xu,Youhuan Zhu,Pengpeng Chen,Wangyan Nie,Yifeng Zhou
Reduced Graphene oxide coating is applied to CuCoHCF material to remove interstitial water at mild reaction environment, and the conductivity is increased without damage of crystal structure. Superior electrochemical performance is observed from the capacitor devices with electrodes made from this material, which is attributed to the decrease in space resistance resulting from intact crystal structure. The specific capacity of 120.2 F g −1 , energy density of 86.5 Wh kg −1 and power density of 4.3 kW kg −1 is achieved on Cu 0.66 Co 0.33 HCF@rGO//AC device. The specific capacity is 98% of starting value after 2000 cycles.
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高影响因子
危险品化学品经营许可证（带存储）