OPTICAL MATERIALS
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2024
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IF 3.8
Shutong Chen,Xiaosan Song,Xichen Song,Yue Zhang
This study involved the synthesis of modified ZnO materials for photoelectrocatalysis (PEC) by a simple and environmentally friendly electrochemical procedure. The objective was to assess their capacity to photochemically breakdown ofloxacin (OFX) in an aqueous solution. To enhance the PEC performance of pure ZnO, a zinc oxide–reduced graphene oxide (ZnO–rGO) composite was synthesized through an electrochemical co-deposition process without the use of a reducing agent. Subsequently, ZnO–rGO was doped with N (ZnO–rGO:N) to further augment the PEC performance of the photoanode. The surface morphology, microstructure, and optical characteristics of the materials were systematically investigated through X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and UV–visible spectroscopy. The parameters for synthesizing ZnO–rGO were optimized based on the experimental results” if it can more simply convey your intended meaning. Electrochemical tests demonstrated that N-doping significantly enhanced the photocurrent density of the ZnO–rGO films, which reached 15.14 μA cm −2 , representing 1.6- and 1.3-fold enhancements with respect to those of pure ZnO (9.25 μA cm −2 ) and ZnO–rGO (12.0 μA cm −2 ), respectively. Additionally, the band gap in ZnO was narrowed from 3.4 to 3.18 eV owing to rGO co-deposition and N-doping. After 180 min of Xe lamp irradiation, with a bias potential of 0.7 V (referenced to Ag/AgCl), ZnO–rGO:N demonstrated an OFX degradation rate of 55.7 %. Thus, the N-doped material exhibited higher PEC performance than either ZnO (31.8 %) or ZnO–rGO (36.3 %), implying its enhanced PEC capabilities. Therefore, the modified ZnO-based photoanode prepared using the straightforward electrochemical deposition method satisfied the objective of this study, which was to enhance its PEC activity while providing a viable foundation for nitrogen doping through electrochemical methods.
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DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Shiyao Yan,Shiping Shao,Yunxiang Tang,Xin Zhang,Chan Guo,Luxue Wang,Jiurong Liu,Lili Wu,Fenglong Wang
Aerogel-based composites, renowned for their three-dimensional (3D) network architecture, are gaining increasing attention as lightweight electromagnetic (EM) wave absorbers. However, attaining high reflection loss, broad effective absorption bandwidth (EAB), and ultrathin thickness concurrently presents a formidable challenge, owing to the stringent demands for precise structural regulation and incorporation of magnetic/dielectric multicomponents with synergistic loss mechanisms within the 3D networks. In this study, we successfully synthesized a 3D hierarchical porous Fe3O4/MoS2/rGO/Ti3C2Tx MXene (FMGM) composite aerogel via directional freezing and subsequent heat treatment processes. Owing to their ingenious structure and multicomponent design, the FMGM aerogels, featured with abundant heterogeneous interface structure and magnetic/dielectric synergism, show exceptional impedance matching characteristics and diverse EM wave absorption mechanisms. After optimization, the prepared ultralight (6.4 mg cm–3) FMGM-2 aerogel exhibits outstanding EM wave absorption performance, achieving a minimal reflection loss of −66.92 dB at a thickness of 3.61 mm and an EAB of 6.08 GHz corresponding to the thickness of 2.3 mm, outperforming most of the previously reported aerogel-based absorbing materials. This research presents an effective strategy for fabricating lightweight, ultrathin, highly efficient, and broad band EM wave absorption materials.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Zhixin Ren,Lin Yang,Xiaoxue Tang,Qing Xu,Yanan Niu,Yuguang Lv,Mingyuan Liu
AgI/CeO 2 /rGO complexes were prepared in different proportions and characterized by XRD , SEM, TEM , FT-IR, XPS, BET, PL , I-T and EIS. The photocatalytic degradation experiments of levofloxacin (LVF) under visible light (λ max =245 nm) was performed to determined the photocatalytic activity of the composites. When the concentration of simulated pollutants is 20 mg/L and the amount of application is 15 mg, the doping ratio is AgI/CeO 2 /3%-rGO, and the photocatalytic effect of the nanocomposite with pH 5 is the best. The maximum photocatalytic degradation rate of 98.02% can be achieved. The cyclic stability of the composites and the kinetics were also analyzed, and possible degradation mechanisms were also proposed. The intermediates were also detected using high performance liquid chromatography-mass spectrometry(HPLC-MS) to obtain the possible degradation process . The results show that AgI/CeO 2 /rGO composite exhibits good photocatalytic degradation performance under visible light, and the maximum photocatalytic degradation rate for treating pollutants containing LVF is 98.02%. These findings are expected to provide important theoretical and practical guidance for environmental treatment and research and development of photocatalytic materials.
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高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2025
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IF 4.6
Yuxia Zhang,Zitong Yang,Jingyu Deng,Yili Zhang,Hongzhen Li,Chen Li,Wenyuan Xu,Zhaohui Hou,Binbin Zhou
The current study aimed to present a molecularly imprinted electrochemical sensing platform for bisphenol A (BPA) detection by synergistically combining conductive RGO-PANI hybrids with porous CoNi-MOF. The RGO-PANI network facilitated electron transfer efficiency, while the porosity of CoNi-MOF enhanced molecular recognition capacity through expanded surface area and tailored recognition cavities. The conditions affecting the determination of BPA were also optimized. A linear increase of the current signal was observed in the concentration range of 1–500 nM BPA. The corresponding detection limit was calculated to be 0.36 nM. Selectivity tests showed good adsorption to BPA, which was attributed to the specificity of the MIP film. Practical validation recoveries of 95.12–103.18 % (RSD<3.6 %) were achieved in milk samples, demonstrating reliability in complex matrices. This study balanced sensitivity and cost-effectiveness compared to other sensors. This sensor provided a viable method for environmental and food safety monitoring.
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高影响因子
ELECTROCHIMICA ACTA
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2025
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IF 5.6
Mingxuan Huang,Huafeng Wang,Shicong Gui,Chujia Xu,Yi Chen,Shaohua Hu,Yubo Li
Accurate monitoring of ROS levels is essential for oxidative stress (OS) management, but their low concentration and instability pose significant detection challenges. Here, we developed a highly sensitive and selective electrochemical biosensor for real-time, micro-volume ROS detection in leukemia cells. The sensor was fabricated using ultrathin g-C₃N₄-rGO (CN-rGO) nanosheet synthesized through a calcination and hydrothermal approach. These nanosheets were deposited onto a screen-printed carbon electrode (SPE) and further modified with silver nanoparticles (AgNPs) to construct a CN-rGO@AgNPs/SPE biosensor. The porous nanostructure significantly enhanced the catalytic surface area and electron transfer efficiency, achieving high sensitivities towards H₂O₂ and O₂·⁻ detection. Using a window titration platform, the sensor detected ROS in 0.1 mL lysates of leukemia cell lines (U-937, THP-1, and MOLM-13) with concentrations of 7.38 ± 4.81 μM, 11.74 ± 0.985 μM, 19.84 ± 3.73 μM, respectively. Furthermore, the platform allowed precise monitoring of doxorubicin (DOX)-induced OS, providing valuable insights for guiding leukemia chemotherapy. Additionally, Lipopolysaccharide (LPS) stimulation experiments demonstrated the sensor's exceptional real-time performance, enabling dynamic detection of H₂O₂ release kinetics and ROS generation rates at the cellular level. Combining high sensitivity, low detection limits, and micro-volume analysis capabilities, this sensor holds great potential for clinical auxiliary diagnosis and drug efficacy assessment in leukemia research.
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高影响因子
ACS Applied Nano Materials
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2024
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IF 5.3
Yi Jiang,Limei Zhang,Junlai Jiang,Suwen Li,Yanling Cao,Jinying Yue,Hao Gu
Detecting pressure plays a vital role in electronic skin, which holds vast potential for recognizing physiological signals within the human body. Conventional pressure detection devices frequently encounter issues such as limited detection ranges and low cyclic retention rates. This study utilizes electrostatic self-assembly to precisely deposit reduced graphene oxide (rGO) onto the substrate surface, thereby creating a highly sensitive pressure feedback layer upon reduction. Furthermore, electrostatic spinning is employed to fabricate poly(vinyl alcohol) fibers at the interface between the pressure feedback layer and the interdigitated electrodes, thereby augmenting device sensitivity. Sensors fabricated using this method demonstrate exceptional sensing capabilities across a broad pressure spectrum, achieving ultrahigh sensitivities of 195.44, 165.79, and 125.95 kPa–1 within the ranges of 0–2.7, 2.7–6.91, and 6.91–20 kPa, respectively. They exhibit a rapid deformation response of 92 ms and a fast deformation recovery of 70 ms. Moreover, these sensors display outstanding durability, maintaining over 80% cyclic retention after 10,000 loading–unloading cycles. Finite element numerical simulation results suggest that the rGO/CTAB/CMF composite material, prepared using this method, exhibits superior mechanical and sensing properties. Furthermore, by integration with a custom microprocessor, the sensor’s operational capability is significantly enhanced, enabling precise processing and analysis of limb signal data in everyday situations.
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高影响因子
Journal of Materials Chemistry C
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2025
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IF 5.1
Xue-Ting Li,Kai Zhang,Jian Wei,Yan-Bin Zhang,Zhuang Miao,Jia-Yi Hou,Yi Yao
Designing composite electromagnetic wave absorption (EWA) materials with a strategic structure is a key approach to improve the EWA efficiency of SiC nanowires (SiCNWs). In this study, SiCNWs/reduced graphene oxide (SiCNWs/RGO) composites with layered porous structures were successfully prepared using homemade SiCNWs and graphene oxide (GO) using simple freeze-drying and heat treatment techniques. Then the EWA performance of SiCNWs/RGO with different filling amounts (5 wt%, 15 wt% and 25 wt%) was investigated. A minimum reflection loss (RLmin) value of −47 dB at 12.7 GHz was achieved when SiCNWs/RGO was filled with 5 wt% and the coating thickness was 2.2 mm. When the coating thickness was reduced to 2.0 mm, the effective absorption bandwidth (EAB) extended to 5.78 GHz (12.02 to 17.8 GHz), covering the entire Ku band. The outstanding EWA performance was primarily due to the layered porous structure, which facilitates multiple reflections and scattering of electromagnetic waves (EMWs). This structure not only lengthened the wave attenuation path but also worked synergistically with dielectric and conductive losses. The SiCNWs/RGO composites prepared in this study are characterized by light weight, thin thickness and high absorption rate, enabling them to be particularly suitable for electromagnetic shielding in the field of livelihood and ecology.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
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IF 7.139
Yuhui Li,Enze Zhu,Juan Yu,Jie Yu,Jirong Yang,Weiping Liu,Xiaoyin Cui,Xikun Yang,Yingjie Zhang,Mingli Xu
A novel carbon fiber paper loaded with reduced graphene oxide (rGO) was used as the substrate, on which Pt–Ni nanoparticles were electro-deposited as to prepare an integrated electrode by two electrochemical methods (cyclic voltammetry and square wave pulse). The electrochemical tests indicated two integrated electrodes had excellent performance towards methanol oxidation . Especially, Pt-Ni-CV(A)-rGO/CFP electrode showed the highest electrocatalytic activity , and mass activity reached 5.33 A·mg −1 Pt , which was about 5.6 times that of the commercial Pt/C catalyst (JM). Further, after annealing under a reducing atmosphere, two electrodes exhibited completely different changes in the aspects of morphology and electrocatalytic performance. It can be attributed to the changes of element distribution and morphology of nanoparticles after annealing. The as-prepared Pt–Ni-rGO/CFPs composite electrode is promising for integrated electrode of proton exchange membrane fuel cells. This work opens an avenue for the preparation of high-performance integrated electrode.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Xueyan Wang,Baoyu Huang,Xiaofang Wu,Ding Gu,Xiaogan Li
Two-dimensional reduced graphene oxide (rGO) nanosheets were pre-sulfonated and further incorporated by WS 2 nanoflakes to form S-rGO/WS 2 heterojunctions by hydrothermal synthesis. The sulfonation and WS 2 incorporation in S-rGO/WS 2 heterojunction have been confirmed by EDS, XPS and FTIR. The sensing performance of rGO-based chemiresistive-type sensor to ammonia at room temperature has been significantly improved by the sulfonation and incorporation of WS 2 nanoflakes. The chemiresistive sensor based on S-rGO/WS 2 exhibits enhanced response signals to 10∼50 ppm ammonia, while the response/recovery time is significantly shortened compared to rGO/WS 2 reported previously at room temperature. It benefits from both the extra introduced active acid centers sensitive to ammonia molecules and the better desorption-ability facilitated significantly by sulfonate groups (S O 3 H). The adsorption energy calculation of ammonia molecule on the sulfonated graphene sheet based on density functional theory (DFT) has been performed to illustrate the adsorption capacity of S O 3 H group. The selectivity and stability of gas sensor based on S-rGO/WS 2 have also been studied.
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高影响因子
CARBON
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2021
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IF 9.594
Jun Liao,Mingquan Ye,Aijun Han,Jianming Guo,Qingzhong Liu,Gaoqiang Yu
Electromagnetic (EM) wave absorber with the characteristics of thin thickness, strong absorption capacity and broad absorption bandwidth is desirable to address the EM radiation. In this work, the flower-like Cu 9 S 5 /RGO (CSR) composites were synthesized via a solvothermal method. Various kinds of characterizations were utilized to certify the successful preparation and properties of CSR composites. To explore the EM wave absorption performance of the CSR composites, we measured the EM parameters and calculated the reflection loss (RL) values of all the samples. Owing to the comprehensive effect of well impedance matching and large attenuation constant , the CSR-2 sample exhibited the minimum RL value of −51.9 dB at the thickness of 2.8 mm, and the widest effective absorption bandwidth (EAB) is 3.92 GHz in 1.5 mm. Furthermore, the absorption mechanisms were revealed, the impressive EM wave absorption performance of the CSR-2 is inseparable from the conductive loss and polarization relaxation, as well as the slight magnetic loss. We consider that the CSR composite can be a promising candidate for efficient and superior EM wave absorption absorber.
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高影响因子
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
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2021
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IF 4.32
Xiao Zhou,Min Zhou,Shengjun Ye,Yanbin Xu,Shaoqi Zhou,Qiujie Cai,Guangyan Xie,Lu Huang,Li Zheng,Yuxin Li
The antibacterial activity and mechanism of reduced graphene oxide (rGO)-modified TiO 2 were assessed against Enterobacter hormaechei in this study. The rGO-modified TiO 2 exhibited an enhanced antibacterial activity against E. hormaechei under UV–Visible light irradiation compared with individual TiO 2 or rGO alone. Its effectiveness owed to the synergistic effect of the improved adsorption and the lower recombination of photo-induced electron–hole pairs. The hybrid photocatalyst improved charge separation and chemical binding activity that contributed to accelerated antibacterial process. The flow cytometry results showed that the hybrid photocatalyst reduced the survival ratio of E. hormaechei to about 10% with 90 min under visible light illumination. The XPS spectra and SEM micrographs indicated a direct physical contact and disruptive interaction between the bacteria and the rGO-TiO 2 catalyst, mostly on rGO, resulting in oxidizing a vital cellular structure. EPR measurement revealed that hydroxyl radicals were the dominant active species that can cause the peroxidation of lipids in the outer cell wall and the damage of cell organelles and components inside the bacteria, which is the key mechanism for this antibacterial process. Overall, this study indicated that rGO-modified TiO 2 nanocomposite has great potential as an economical, environmentally friendly and easily available antibacterial material for antibacterial.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2016
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IF 5.31
Dong Ma,Juan Wu,Mengchun Gao,Yanjun Xin,Tianjin Ma,Yuying Sun
An efficient visible-light-driven Z-scheme g -C 3 N 4 /RGO/Bi 2 WO 6 composite was fabricated by the hydrothermal method. The prepared g -C 3 N 4 /RGO/Bi 2 WO 6 composite were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), nitrogen sorption, Fourier transform infrared spectroscopy (FT-IR), diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectrometer (XPS). The photocatalytic activity of the g -C 3 N 4 /RGO/Bi 2 WO 6 composite was evaluated by the degradation of 2,4,6-trichlorophenol (TCP) under visible-light irradiation. The photochemical test and scavenging experiment showed the photogenerated electrons (e − ) and holes (h + ) had strong reducing capability and oxidation capability, respectively. The photocatalytic activity of the g -C 3 N 4 /RGO/Bi 2 WO 6 composite was higher than that of the pure g -C 3 N 4 , Bi 2 WO 6 , and g -C 3 N 4 /Bi 2 WO 6 during the TCP degradation, which could be due to the efficient visible-light utilization efficiency and the construction of Z-scheme. RGO served as a charge transmission bridge between the g -C 3 N 4 and the Bi 2 WO 6 , and the Z-scheme kept the electrons with high reducing capability in the conduction band (CB) of g -C 3 N 4 and the holes with high oxidation capability in the valence band (VB) of Bi 2 WO 6 . The photogenerated holes of Bi 2 WO 6 were the major active species in the TCP oxidative degradation, and the photogenerated electrons of g -C 3 N 4 were the major active species in the TCP dechlorination.
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高影响因子
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