Analytical Methods
·
2022
·Vol. 14
·期 32
·3079-3086
·
IF 3.532
Shuang Han,Ruonan Sun,Fu Teng,Yuan Wang,Hongtao Chu,Wei Zong,Yao Chen,Zhonghui Sun
p-Cresol is a harmful phenolic substance that can cause serious effects on human health even at a low concentration in water. Therefore, the detection of p-cresol in a water environment is particularly important. In this paper, a novel zeolite imidazolate framework-67 (ZIF-67) material with regular morphology was prepared on the surface of graphene oxide doped with silver nanoparticles. The composite was modified on the glassy carbon electrode surface to increase the specific surface area, accelerate the electron transfer rate, enhance the current response and improve the performance of electrochemical sensors. Furthermore, a layer of p-cresol-molecularly imprinted polymer was prepared on the surface of the modified electrode by electropolymerization for the selective, rapid and sensitive detection of p-cresol, which greatly improved the specific recognition of p-cresol. Under optimal conditions, the prepared sensor had a good linear range of 1.0 × 10−10 M to 1.0 × 10−5 M with a detection limit as low as 5.4 × 10−11 M, and it presented excellent reproducibility, stability and selectivity. Moreover, the sensor was successfully applied for the detection of trace p-cresol in a real water environment, providing a reliable assay for sensitive, rapid and selective detection of p-cresol in complex samples.
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BIOMATERIALS
·
2019
·
IF 10.273
Yuhan Chen,Xinzhu Liu,Shuliang Guo,Jun Cao,Jing Zhou,Jianli Zuo,Lijuan Bai
The present work described a novel sandwich-type electrochemical aptasensor for rapid and sensitive determination of Mycobacterium tuberculosis MPT64 antigen. Herein, a novel carbon nanocomposite composed of fullerene nanoparticles , nitrogen-doped carbon nanotubes and graphene oxide (C 60 NPs-N-CNTs/GO) was facilely synthesized for the first time, which not only possessed a large specific surface area and excellent conductivity , but also exhibited outstanding inherent electroactive property, and therefore served as nanocarrier and redox nanoprobe simultaneously. Gold nanoparticles (AuNPs) was then uniformly anchored onto the surface of such nanocomposite via Au–N bonds to bind with MPT64 antigen aptamer Ⅱ (MAA Ⅱ), forming the tracer label to realize generation and amplification of electrochemical signal. Additionally, conductive polyethyleneimine (PEI)-functionalized Fe-based metal-organic framework (P-MOF) was used as a sensing platform to absorb bimetallic core-shell Au–Pt nanoparticles ( [email protected] ), which could accelerate electron transfer and increase the immobilization of MPT64 antigen aptamer Ⅰ (MAA Ⅰ). After the typical sandwich-type protein-aptamer recognition, the inherent electroactivity of the tracer label was provoked by tetraoctylammonium bromide (TOAB), leading to a well-defined current response. Under the optimum condition, the proposed aptasensor showed a wide linear range for MPT64 detection from 1 fg/mL to 1 ng/mL with a limit of detection (LOD) as low as 0.33 fg/mL. More importantly, it was successfully used for MPT64 antigen detection in human serum, exhibiting a promising prospect for TB diagnosis in clinical practice.
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Frontiers in Immunology
·
2024
·
IF 5.7
Shen Man,Dai Xianling,Ning Dongni,Xu Hanqing,Zhou Yang,Chen Gangan,Ren Zhangyin,Chen Ming,Gao Mingxuan,Bao Jing
The treatment of wound inflammation is intricately linked to the concentration of reactive oxygen species (ROS) in the wound microenvironment. Among these ROS, H2O2 serves as a critical signaling molecule and second messenger, necessitating the urgent need for its rapid real-time quantitative detection, as well as effective clearance, in the pursuit of effective wound inflammation treatment. Here, we exploited a sophisticated 3D Cu2-xSe/GO nanostructure-based nanonzymatic H2O2 electrochemical sensor, which is further decorated with evenly distributed Pt nanoparticles (Pt NPs) through electrodeposition. The obtained Cu2-xSe/GO@Pt/SPCE sensing electrode possesses a remarkable increase in specific surface derived from the three-dimensional surface constructed by GO nanosheets. Moreover, the localized surface plasma effect of the Cu2-xSe nanospheres enhances the separation of photogenerated electron-hole pairs between the interface of the Cu2-xSe NPs and the Pt NPs. This innovation enables near-infrared light-enhanced catalysis, significantly reducing the detection limit of the Cu2-xSe/GO@Pt/SPCE sensing electrode for H2O2 (from 1.45 μM to 0.53μM) under NIR light. Furthermore, this biosensor electrode enables in-situ real-time monitoring of H2O2 released by cells. The NIR-enhanced Cu2-xSe/GO@Pt/SPCE sensing electrode provide a simple-yet-effective method to achieve a detection of ROS (H2O2、-OH) with high sensitivity and efficiency. This innovation promises to revolutionize the field of wound inflammation treatment by providing clinicians with a powerful tool for accurate and rapid assessment of ROS levels, ultimately leading to improved patient outcomes.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Fazal Muhammad Khoso,Jin-Gang Yu
A novel 3D RN-GO 1:3/160°C/8h composite with hetero-atomic functional groups (–O, –S, –N) was successfully fabricated using Ranitidine (RN) to functionalize GO by a facile hydrothermal assembly, which demonstrated excellent selectivity in removing Cd 2+ from aqueous solutions. The composite’s morphology, functional groups, elemental composition, and thermal stability were comprehensively characterized using SEM, EDS, FT-IR, XPS, and TGA techniques. Adsorption experiments revealed that pH, contact time, initial Cd 2+ concentration, and temperature significantly influenced the removal efficiency, and optimal conditions were identified for maximum Cd 2+ uptake. Kinetic studies indicated a complex adsorption mechanism best described by the pseudo-second-order model. Thermodynamic analysis confirmed the spontaneous and endothermic nature of the adsorption process. Furthermore, the adsorption isothermal data suggested the adsorption was monolayer over a homogeneous surface of the composite. To evaluate regeneration performance, 50.0 mg of the 3D RN-GO 1:3/160°C/8h composite was exposed to 20.0 mL of Cd 2+ aqueous solution. After five consecutive adsorption–desorption cycles, the composite maintained >95 % adsorption and desorption efficiency for Cd 2+ . The abundant hetero-atomic functional groups (–O, –S, –N) on 3D RN-GO 1:3/160°C/8h composite facilitated Cd 2+ ion adsorption through surface complexation. This study highlights the potential of the developed 3D RN-GO 1:3/160°C/8h composite as a promising adsorbent for water pollution remediation.
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COMPOSITES SCIENCE AND TECHNOLOGY
·
2019
·
IF 6.309
Mingye Wang,Lichun Ma,Longlong Shi,Peifeng Feng,Xuejie Wang,Yingying Zhu,Guangshun Wu,Guojun Song
A facile and rapid come close to the manufacture of advanced epoxy nanocomposites by grafting of nano-silicon dioxide (nano-SiO 2 ) onto the graphene oxide (GO) through thiol-ene click reaction was reported. The correlations between surface modification, morphology, dispersion/exfoliation, interfacial interaction of sheets and the corresponding mechanical properties of the composites were methodically explored. It appeared that nano-SiO 2 have been grafted onto GO via covalent bonding successfully, which effectively improved the interface compatibility and dispersion in epoxy matrix. The reinforcing mechanisms has been also elaborated. It is demonstrated that the tensile strength and elastic modulus for filler with 0.1 wt% GO-SiO 2 /epoxy composites increased by 32.18% and 22.86% compared to neat epoxy, respectively. It is believed that the simplistic and effectual method may provide a novel and promising strengthen design strategy for next‐generation advanced nanocomposite structures.
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CORROSION
·
2021
·Vol. 77
·期 12
·1258-1273
·
IF 1.77
Qian Cheng,Xiao Fengjuan,Zhao Dong,Zhang Hualin,Wang Shimao,Tian Zhiren,Yang Han,Duan Yumei,Zhang Xuefei,Wang Meng,Yan Lu,Kong Shimao Longfei,Gao Hui,Zhang Guangtian,Fu Shifeng,Li Mengya,Li Jun
Polyaniline nanofiber (PANI-f) was covalently linked with cetyltrimethyl ammonium bromide (CTAB) modified graphene oxide nanosheets (CTGO) to fabricate a smart composite coating for corrosion protection of carbon steel. In the copolymerization process, CTAB served both as a modifier for the modification of GO and a dispersant for the preparation of polyaniline nanofibers. The prepared PANI-f can avoid the accelerated corrosion of steel by a conventional synthesis method using hydrochloric acid as medium. The covalent binding between PANI-f and CTGO improved the compatibility of PANI-f-GO with the waterborne epoxy emulsion, which significantly enhanced the hydrophobicity and antipermeability of the coating. The PANI-f-GO waterborne epoxy coating exhibited excellent smart corrosion protection efficiency by catalyzing the formation of passivation film on the steel surface. Molecular adsorption energy on Fe(110) and radial distribution function confirmed the chemical adsorption of the PANI-f-GO composite on the steel surface. The superior smart protective performance can be ascribed to the synergistic effects of PANI-f and CTGO.
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PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Hang Ye,Yuanjun Liu
Coastal shallow-water highway surfaces are subjected to composite damage caused by “wave erosion-UV aging-salt fog corrosion.” Existing sound-absorbing materials fail rapidly due to their inability to balance “wear resistance-sound absorption-weather resistance” performance, and there is a lack of systematic research on the synergistic enhancement mechanisms of multiple performance characteristics. This paper proposes a novel multi-level synergistic design strategy combining “covalent cross-linking + two-dimensional network reinforcement + foam structure regulation.” Silane coupling agent (KH550) forms Si-O-Si covalent bonds between hollow glass microspheres (HGB) and the matrix. Combined with the two-dimensional layered network of graphene oxide (GO) to support and constrain foam pores, a KHGB/GO composite membrane with “soft matrix -hard particles-gradient foam pores.” Experimental results indicate that the composite membrane exhibits an abrasion resistance index of 400 (representing a 66.64 % improvement over the unmodified membrane). Furthermore, during 7000 to 9000 friction cycles, its mass loss remained below 0.1 mg-a value lower than the lower limit of precision for the microbalance used in the analysis. The sound absorption coefficient at 5470 Hz reaches 0.9445. After 168 h of salt spray corrosion, the UPF retention rate, tensile strength retention rate, and sound absorption coefficient retention rate were 94 %, 67.71 %, and 89.96 %, respectively, achieving synergistic stability of multiple properties under extreme conditions. This provides an innovative solution for long-term noise reduction in coastal infrastructure.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Chang Niu,Gongao Jiao,Lanjuan Zhou,Dongzhi Zhang
Carbon capture utilization and storage for reducing anthropogenic CO 2 emissions involve capturing CO 2 from industrial sources and injecting it into geological sinks such as oil reservoirs and depleted gas fields. To ensure environmental and public safety during carbon sequestration implementation, efficient CO 2 monitoring technologies must be developed to detect potential leaks at sequestration sites. Traditional CO 2 sensors used for monitoring these sites typically feature high costs and require specialized personnel for maintenance. This paper innovatively employs an immersion method to construct a surface acoustic wave (SAW) CO 2 sensor based on a polyethyleneimine-coated magnesium metal-organic framework (PEI@Mg-MOF-74) nanocomposite film. The PEI@Mg-MOF-74 SAW sensor exhibits ultra-high sensitivity across a CO 2 concentration range of 500–6000 ppm, with rapid response and recovery times of 11 s/6 s. Additionally, the sensor demonstrates excellent repeatability, selectivity, and long-term stability. Simultaneously, a graphene oxide/ Carboxymethyl Cellulose surface acoustic wave (SAW) humidity sensor was developed to address humidity-related issues. It exhibits ultra-high sensitivity of 14.29 kHz/% RH across a relative humidity range of 11–97% RH, coupled with rapid response and recovery times of 4 s/5 s. The SAW-based CO 2 sensor incorporates humidity compensation through the CSA-AdamW-CapsNet algorithm, and a wireless testing system based on the microcontroller was developed to enable wireless CO 2 and relative humidity measurement. This research provides theoretical foundations and technical prototypes for developing next-generation passive wireless smart sensing systems, holding significant application value in fields such as carbon dioxide capture and sequestration.
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CONSTRUCTION AND BUILDING MATERIALS
·
2023
·
IF 7.4
Wei Yang,Ximing Zheng,Mingli Cao
Spent adsorbents often contain harmful substances, which may have an impact on the ecological environment if these substances enter the environment. This study mainly introduces a safe treatment method for solid waste formed after heavy metal ions are adsorbed by an efficient adsorbent, ZIF-8@GO-COOH. This work mainly discusses the impact of solidifying the spent adsorbent in the cement system on the cement mechanical properties and hydration process. The experimental results showed that when the dosage of the spent adsorbent was 0.01%, 0.02%, 0.03%, and 0.04%, respectively, the compressive strength of 28 d was increased by 4.24%, 6.16%, 7.19%, and 8.87%, respectively, compared with the cement without spent adsorbent. Introducing spent ZIF-8@GO-COOH in the cement production process does not have a negative impact on the cement mechanical properties, and can refine the cement pore structure and dense microstructure, thereby improving the compressive strength. The Toxicity Characteristic Leaching Procedure (TCLP) results showed that solidifying the spent adsorbent with cement can effectively reduce the leaching of heavy metal ions in the spent adsorbent. This study solidifies the spent ZIF-8@GO-COOH nanoadsorbent material into the cement system as a sustainable alternative to landfilling. This treatment method has certain economic benefits and safety, and has some reference significance for promoting the development and improvement of spent adsorbents and improving their safe treatment and reuse.
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ACS Omega
·
2022
·
IF 4.132
Wenjie Cheng,Tianxiao Qiao,Caihong Xue,Hao Yang,Yong Huang,Yuehua Ma,Hui Nan,Heqi Li,Hong Lin
In order to overcome the problems of poor corrosion resistance and low hydrophobicity of water-based coatings. Two corrosion-inhibiting materials, graphene oxide (GO) and modified chitosan (MCS), were added to the coatings to obtain a new type of coating with comprehensive properties. The composite material formed by PVA cross-linked waterborne epoxy resin was named “substrate”. The density functional theory (DFT) calculation was used to explore the binding ability of MCS and GO-grafted MCS to the substrate, respectively. The results showed that the complex cross-linked network structure formed by the grafting of GO and MCS not only improved the intermolecular interaction force but also improved the binding ability to the substrate, and the coating is denser, effectively delaying the erosion to the coating by the corrosive medium. The composite coating exhibited excellent dual functional properties of hydrophobicity and corrosion resistance at the coating–metal interface, and a stronger protective effect was formed upon the steel plate. Studies showed that this composite coating has good hydrophobic properties. (The contact angle of the composite waterborne coating reaches 87°.) It also has low self-corrosion current (0.28/cm–2) and high corrosion voltage (−0.45 V). The maximum inhibition efficiency of the coating is 99.97%.
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Materials Science & Engineering C-Materials for Biological Applications
·
2019
·
IF 4.959
Zhu Mengting,Tonni Agustiono Kurniawan,You Yanping,Ram Avtar,Mohd Hafiz Dzarfan Othman
Bisphenol A (BPA) is a refractory pollutant presents in water body that possesses serious threats to living organisms. To deal with it, we investigate and evaluate the effectiveness of GO@BiOI/Bi 2 WO 6 composite as a novel photocatalyst for BPA removal from aqueous solutions under UV–vis irradiation. To enhance its removal for BPA, the surface of BiOI/Bi 2 WO 6 is modified with graphene oxide (GO). This composite is named as ‘GO@BiOI/Bi 2 WO 6 ’. Changes in its physico-chemical properties after surface modification with GO are characterized by XRD, FTIR, FESEM-EDS, XPS, PL, and BET methods. Optimized conditions of BPA degradation by the composite are determined under identical conditions. Photodegradation pathways of BPA and its removal mechanisms by the same composite are presented. It is obvious that the GO@BiOI/Bi 2 WO 6 has demonstrated its potential as a promising photocatalyst for BPA removal under UV–vis irradiation. About 81% of BPA removal is attained by the GO@BiOI/Bi 2 WO 6 under optimized conditions (10 mg/L of BPA, 0.5 g/L of dose, pH 7 and 5 h of reaction time). The oxidation by-products of BPA degradation include p -hydroquinone or 4-(1-hydroxy-1-methyl-ethyl)-phenol. In spite of its performance, the treated effluents are still unable to meet the maximum discharge limit of <1 mg/L set by national legislation. Therefore, subsequent biological processes are essential to maximize its biodegradation in the wastewater samples before their discharge into waterbody.
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Nanoscale
·
2015
·Vol. 7
·期 18
·8495-8502
·
IF 7.394
Shouting Zhang,Hua Li,Zhiyi Wang,Jian Liu,Haoli Zhang,Baodui Wang,Zhengyin Yang
We have developed an efficient strategy for synthesizing a strongly coupled Au/Fe3O4/GO hybrid material to improve the catalytic activity, stability, and separation capability of Au nanoparticles (NPs) and Hg2+. The hybrid material can be synthesized by the direct anchoring of Au and Fe3O4 NPs on the functional groups of GO. This approach affords strong chemical attachments between the NPs and GO, allowing this hybrid material to ultrasensitively detect Hg2+ in aqueous solutions with a detection limit as low as 0.15 nM. In addition, the deposition of Hg0 on the surface of Au/Fe3O4/GO could be quickly (within 30 min) and efficiently (>99% elimination efficiency) removed by the simple application of an external magnetic field and then Au/Fe3O4/GO could be subsequently reused at least 15 times, with the elimination efficiency remaining high (>96%).
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