JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2025
·Vol. 172
·期 4
·047521
·
IF 3.3
Shengbao Zhou,Yuehuan Yuan,Chun Zhao,Feifei Zhang,Zonghua Wang
This study investigates the application of a copper oxide/carbon nanotubes/carbon nitride(CuO/CNTs/g-C3N4) composite as electrode material for acetaminophen detection. The synthesized nanomaterials were characterized using scanning electron microscopy, transmission electron microscopy, energy-dispersive spectroscopy, and powder X-ray diffraction. The electrochemical behavior of acetaminophen was assessed via cyclic voltammetry and square wave volammetry methods. The synergistic effects of CuO, g-C3N4 and CNTs enhance electron transfer, facilitating the conversion of irreversible oxidation processes into reversible redox events. The CuO/CNTs/g-C3N4 sensing electrode exhibited a significantly stronger redox peak signal, reflecting improved catalytic performance for acetaminophen detection. The sensor demonstrated a linear detection range of 0.02–0.1 and 1–120 μmol l−1, with a detection limit of 5.89 nmol l−1. The results affirm that the CuO/CNTs/g-C3N4 sensing electrode provides robust reproducibility and stability for the determination of acetaminophen.
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高影响因子
Cell Reports Physical Science
·
2025
·
IF 7.3
Fan Wu,Yukun Ma,Lijing Fan,Shaohua Chen,Jieyi Shen,Yanxin Chen,Pengxin Liu
Hydrogen peroxide (H 2 O 2 ) is a versatile and environmentally friendly oxidant whose industrial production has potentially more sustainable routes. Photocatalyzed H 2 O 2 generation represents a mild and efficient alternative, utilizing solar energy to reduce oxygen. However, how the photooxidation half reactions of hole scavengers affect the overall catalytic performances is largely overlooked. Here, we report that photooxidation half reactions are the real rate-limiting steps and that the choice of hole scavengers vitally affects the overall production rate of H 2 O 2 . The H 2 O 2 formation kinetic constants for 12 hole scavengers are compared with their electrooxidation potentials, calculated orbital energies, and energy gaps. No general correlation is found. Several possibilities are proposed, including the influences of different surface adsorption and surface reaction pathways. Our finding suggests that in practice, it is difficult to choose the right half reaction based on intuition or experiences with other systems. A case-by-case study is needed.
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高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2012
·Vol. 50
·期 10
·2053-2067
·
IF 3.919
Yan-Ling Luo,Wei Yu,Feng Xu,Li-Li Zhang
A novel double brush-shaped copolymer with amphiphilic polyacrylate- b -poly(ethylene glycol)- b -poly acrylate copolymer (PA- b -PEG- b -PA) as a backbone and thermosensitive poly( N -isopropylacrylamide) (PNIPAM) long side chains at both ends of the PEG was synthesized via an atom transfer radical polymerization (ATRP) route, and the structure was confirmed by FTIR, 1 H NMR, and SEC. The thermosensitive self-assembly behavior was examined via UV-vis, TEM, DLS, and surface tension measurements, etc. The self-assembled micelles, with low critical solution temperatures (LCST) of 34–38 ° C, form irregular fusiform and/or spherical morphologies with single, double, and petaling cores in aqueous solution at room temperature, while above the LCST the micelles took on more regular and smooth spherical shapes with diameter ranges from 45 to 100 nm. The micelle exhibits high stabilities even in simulated physiological media, with low critical micellization concentration (CMC) up to 5.50, 4.89, and 5.05 mg L −1 in aqueous solution, pH 1.4 and 7.4 PBS solutions, respectively. The TEM and DLS determination reveled that the copolymer micelle had broad size distribution below its LCST while it produces narrow and homogeneous size above the LCST. The cytotoxicity was investigated by MTT assays to elucidate the application potential of the as-prepared block polymer brushes as drug controlled release vehicles. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012
研究领域:
高分子化学
·
材料科学
·
药物递送
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高影响因子
ChemCatChem
·
2020
·Vol. 12
·期 10
·2745-2751
·
IF 4.853
Xinyang Guo,Fei Xue,Shikai Xu,Shaohua Shen,Hongwen Huang,Maochang Liu
Graphical How do you wave ? In this work, we realized the coupling of localized photothermal effect into a cocatalytic material by developing a unique core-shell Cu@Ni nanoplate cocatalyst for efficient photocatalytic H 2 production from water. Specifically, Cu nanoplate could induce localized hot spots on Ni nanoparticles via a visible-light-driven surface plasma resonance effect. As a result, photogenerated electrons transferred from g-C 3 N 4 to Ni, could be elevated to a more energetic state, leading to a substantially improved photocatalytic activity. The general moderate reaction condition in solar photocatalytic hydrogen production (i. e., near ambient pressure, room temperature) makes interfacial mass and energy transfer extremely slow, even by employing a cocatalytic material (usually in the form of noble metal nanoparticles or their counterparts). Herein, by fabricating well-defined Cu@Ni core-shell nanoplate cocatalyst and further incorporating it with a g-C 3 N 4 photocatalyst, we demonstrate that interfacial processes could be significantly improved by coupling localized photothermal effect into a cocatalyst. Specifically, Cu nanoplate can induce localized strong hot spots on Ni nanoparticles via a visible-light-driven surface plasma resonance effect. As a result, photogenerated electrons transferred from g-C 3 N 4 to Ni, could be elevated to a more energetic state, leading to a substantially improved photocatalytic activity toward H 2 evolution from water. The highest hydrogen generation rate reaches 55 μmol h −1 g −1 , 110 times of that pristine g-C 3 N 4 . This work indicates that photoelectric and photothermal effects can be effectively coupled by integrating metal hetero-nanoparticles.
研究领域:
材料科学
·
能源化学
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高影响因子
BIOSENSORS & BIOELECTRONICS
·
2015
·
IF 6.409
Zonghua Wang,Jianfei Xia,Daimin Song,Feifei Zhang,Min Yang,Rijun Gui,Lin Xia,Sai Bi,Yanzhi Xia
A versatile label-free quadruple signal amplification biosensing platform for p53 gene (target DNA) detection was proposed. The chitosan–graphene (CS–GR) modified electrode with excellent electron transfer ability could provide a large specific surface for high levels of AuNPs-DNA attachment. The large amount of AuNPs could immobilize more capture probes and enhance the electrochemical signal with the excellent electrocatalytic activity . Furthermore, with the assist of N.BstNB I (the nicking endonuclease), target DNA could be reused and more G-quadruplex-hemin DNAzyme could be formed, allowing significant signal amplification in the presence of H 2 O 2 . Such strategy can enhance the oxidation–reduction reaction of adsorbed methylene blue (MB) and efficiently improve the sensitivity of the proposed biosensor. The morphologies of materials and the stepwise biosensor were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and cyclic voltammetry (CV). Differential pulse voltammetry (DPV) signals of MB provided quantitative measures of the concentrations of target DNA, with a linear calibration range of 1.0×10 −15 –1.0×10 −9 M and a detection limit of 3.0×10 −16 M. Moreover, the resulting biosensor also exhibited good specificity, acceptable reproducibility and stability, indicating that the present strategy was promising for broad potential application in clinic assay.
研究领域:
生物化学
·
医学检测
·
纳米材料科学
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DOI
PubMed
高影响因子
ChemistryOpen
·
2019
·Vol. 8
·期 5
·643-649
·
IF 2.205
Boyu Du,Bingyang Liu,Xing Wang,Jinghui Zhou
Graphical Lignin explained : Phosphotungstic acid polyoxometalate catalyst showed high activity in the selective depolymerization of three types of lignin samples to phenolic monomers, and the impact of the structure differences on the distribution of phenolic monomers were well studied. Emphasis was placed on changing the types of lignin samples to control the secondary depolymerization of methoxy groups and greatly improving the selectivity of phenolic monomers. Herein we studied the chemical structure of different types of lignin samples and the potential to prepare phenolic monomers was illustrated by phosphotungstic acid catalysts. Different types of H/G/S lignin components had different structures. The lignin extracted from poplar had the highest molecular weight and β-O-4 aryl ether contents, followed by pine and straw lignin samples. After depolymerization by PTA catalyst, the yields of phenolic monomers detected was 8.06 wt % (poplar), 5.44 wt % (pine) and 4.52 wt % (straw), respectively. Further, the ratios of H/G/S in the phenol monomers were also different, indicating that the S, G and H types structural units were continuously transformed with each other during the reaction. In our study, the change in the types of lignin samples resulted into an improvement of the distribution of phenolic products, and also the selectivity of phenolic monomers significantly.
研究领域:
化学工程
·
可再生资源
·
催化科学
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Shaodong Sun,Jia Li,Peng Song,Jie Cui,Qing Yang,Xing Zheng,Zhimao Yang,Shuhua Liang
Constructing isotype heterostructure is an effective way to promote the separation of photogenerated charge carriers for graphitic carbon nitride (g-C 3 N 4 ). However, the interface derived from different source precursors is not good enough for the charge separation of g-C 3 N 4 /g-C 3 N 4 isotype heterojunctions , resulting in a limited improvement of photocatalytic performance. Here, we presented a rational design and synthesis of the g-C 3 N 4 (bulk)/g-C 3 N 4 (nanosheet) (denoted as BCN/CNNS) isotype heterojunctions with tight interfaces for enhanced photocatalytic hydrogen evolution . Using glucose-modified melamine as the single-source precursor for the first time, an isotype heterojunction was in situ formed at the interface between bulk g-C 3 N 4 and g-C 3 N 4 nanosheet . Due to the enhanced visible light absorption and promoted charge carrier separation, the in situ formed BCN/CNNS isotype heterojunctions exhibited highly improved photocatalytic hydrogen evolution activity under visible light irradiation, which was 16.4 and 11.5 times than those of the bare BCN and CNNS, respectively. Such an in situ formed isotype heterojunction with tight interfaces originated from the thermal polymerization of single-source glucose-modified melamine would present a new avenue for developing efficient g-C 3 N 4 -based isotype heterojunction photocatalysts.
研究领域:
材料科学
·
能源化学
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SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Xiangli Shao,Longjiao Zhu,Yangzi Zhang,Zaihui Du,Chunyan Sun,Wentao Xu
Molecular logic gates possess great potential for multi-parameter sensing, intelligent diagnostics, and molecular computation. One remaining challenge was to construct novel new logic gates based on smart nanomaterials and functional nucleic acids. In this study, two novel new logic devices were constructed utilizing ion-tuned DNA/copper nanoclusters (CuNCs), which were dual-responsive to K + and H + . By merely altering the arrangement of a specific sequence of the DNA stabilizer, two kinds of well-designed DNA probes permuted by G-tracts, C-tracts, and poly-T were designed as the building blocks of the logic device. Poly-T acted as the template for the formation of CuNCs. G-tracts and C-tracts enabled a K + /H + -responsive conformational switch into G-quadruplex (G4) and i-motif structures. Such a conformational conversion significantly modulated the fluorescence behaviors of CuNCs. This study discovered the unique interaction between the logic device and graphene oxide (GO). The logic devices were implemented for the analysis of K + and microRNA.
研究领域:
纳米技术
·
生物化学
·
分子生物学
·
生物医学工程
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高影响因子
Materials
·
2021
·Vol. 14
·期 1
·186
·
IF 3.623
Jiayan Ge,Kaiqi Gu,Kewen Sun,Xinyue Wang,Shuangquan Yao,Xiaorong Mo,Shuilian Long,Tingting Lan,Chengrong Qin
Hemicellulose-based composite hydrogels were successfully prepared by adding polydopamine (PDA) microspheres as reinforcing agents. The effects of PDA microsphere size, dosage, and nitrogen content in hydrogel on the mechanical and rheological properties was studied. The compressive strength of hydrogel was increased from 0.11 to 0.30 MPa. The storage modulus G’ was increased from 7.9 to 22.0 KPa. The gaps in the hemicellulose network are filled with PDA microspheres. There is also chemical cross-linking between them. These gaps increased the density of the hydrogel network structure. It also has good water retention and pH sensitivity. The maximum cumulative release rate of methylene blue was 62.82%. The results showed that the release behavior of hydrogel was pH-responsive, which was beneficial to realizing targeted and controlling drug release.Keywords:hemicellulose;polydopamine;hydrogel;mechanical property;pH-sensitive;drug release
研究领域:
材料科学
·
生物医学工程
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DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2026
·
IF 3.9
Zhiling Qiu,Ziyi Yan,Zhangjian Qian,Huimin Zhang,Yucheng Pan,Nan Jiang,Shangyun Wang,Li Na,Xin Xiao
A facile one-pot synthesis of g-C 3 N 4 /ZnO heterojunctions is reported for water remediation. The optimal composite (3:7 mass ratio) achieves enhanced visible-light degradation of methylene blue (k = 0.02033 min -1 ), attributed to interfacial charge separation rather than adsorption, as evidenced by PL and photocurrent measurements. Radical trapping and LC-MS identify •OH and h + as dominant species and reveal a stepwise demethylation degradation pathway. DFT calculations verify a type-II band alignment with a built-in electric field that thermodynamically drives carrier separation. The composite maintains excellent stability over multiple cycles, highlighting its potential for practical photocatalytic applications.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122346
·
IF 7.5
Xiaolong Zhang,Haowen Zhuang,Chenxuan Shao,Chen Wang,Xiaohui Ju,Qi Zhang,Yujia Tong,Weixing Li
Although membrane separation technology has been widely used for oily wastewater treatment in recent years, surface fouling still poses a great threat to application. Due to the strong adsorption of oil droplets onto membrane surface and within pores, pristine membranes are inadequate for long-term oil-water separation applications. Here, a novel photocatalytic nanofiber membrane via microchip grafting with in-situ mineralization was proposed. N-Methylolacrylamide (NMA) was successfully grafted on polyvinylidene fluoride (PVDF) by microfluidic electrospinning, and the grafting amount was 9 times that under conventional bottle reaction conditions. The in-situ mineralization time via the polyphenol-metal network was reduced from 27 h to 18 h, while the mineralization rate increased by threefold compared with the bottle-grafted membrane. For oil-water emulsion separation, the developed PVDF-g-NMA@FeOOH membrane successfully showed the high permeability of 38870 L·m −2 ·h −1 ·bar −1 with the outstanding rejection rate of 99.2%. It displayed great photocatalytic self-cleaning performance, and the flux recovery rate was up to 95.8% after cycle tests. Methhyllene blue (MB) removal rate reached 96.3% in 50 min. The developed membrane holds great promise for applications in oil-water separation and organic contaminant degradation.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2026
·
IF 5.2
Ning Li,Yihui Qi,Shujie Zang,Tingna Shao,Jiaojiao Gao,Lina Lin,Yu Zhao
A novel TiO 2 –g-C 3 N 4 –BiOI (TCB) dual-heterojunction nanocomposite with a hierarchical nanoflower morphology was synthesized via a combined hydrothermal–calcination method. The TCB-2 sample, which contained 2.4% Bi, exhibited exceptional photocatalytic activity for methyl orange degradation, achieving 98.55% removal under xenon-lamp irradiation within 100 min. SEM characterization revealed a nanoflower architecture composed of interlaced nanosheets with abundant interspaces, providing increased active sites and facilitating reactant diffusion. UV–Vis DRS analysis confirmed the narrowed optical band gap and extended visible-light absorption range. The formation of intimate contact between components, which is a prerequisite for heterojunctions, was supported by XRD and XPS analyses, suggesting the possible establishment of dual heterojunctions (Type II and p-n). The catalyst maintained an 82.80% degradation efficiency after three cycles, demonstrating excellent stability. This work provides valuable insights for designing TiO 2 -based photocatalysts with enhanced visible-light utilization for environmental applications.
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