ACS Applied Materials & Interfaces
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2025
·
IF 8.2
Haiyan Zhang,Yitong Chen,Yanhui Wei,Xiaokang Zhang,Hongchao Ma
The development of metal-based redox nanozymes represents a new frontier in pollutant sensing. In this field, designing highly active nanozymes and precisely regulating their enzymatic activity are key challenges. In this work, we report the construction of a copper peroxide@polydopamine (CuO2@PDA) nanozyme with dual enzyme-like activity, mimicking the active centers of laccase and peroxidase. Here, CuO2 acts as the catalytic center, while PDA serves as a carrier to prevent CuO2 aggregation and promotes conversion of CuII/CuI active sites via the reduction effect of its surface catechol groups to complete the catalytic cycle. As expected, the obtained CuO2@PDA nanozyme exhibits significant laccase- and peroxidase-mimetic activities. Moreover, its dual enzymatic activity can be systematically switched by adjusting pH and temperature. Specifically, laccase activity dominates near neutral pH, while CuO2 decomposition into Cu ions and H2O2 at acidic pH triggers peroxidase activity. Similarly, CuO2@PDA exhibits temperature-dependent dual enzymatic activity with peroxidase activity prevailing at low temperatures and laccase activity at high temperatures. According to enzymatic performance and XPS results, a possible catalytic mechanism of the dual enzymatic activity of CuO2@PDA has been proposed. Then, based on the pH-dependent dual enzymatic activity of CuO2@PDA, we constructed a detection system for the isomers of organic pollutants, catechol (CC) and hydroquinone (HQ). The laccase-like activity of CuO2@PDA enables direct oxidation of CC into yellow o-benzoquinone, while HQ discolors the preoxidized substrate generated via the peroxidase-like activity of CuO2@PDA. Moreover, selective sensing for CC and HQ with high sensitivity was achieved in real water samples. This approach can guide the design of nanozymes with multienzymatic activity and unveil their potential uses in environmental pollutant discrimination.
研究领域:
环境科学
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生物化学
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纳米材料
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
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2025
·
IF 2.5
Yuge Liu,Zhiguo Li,Yongmei Jia
The fast detection of environmental contaminants catechol (CC) and hydroquinone (HQ) is of great importance to public health. In this research, a composite was firstly synthesised by a pre-exfoliation method, the components of which were Ni-Al-LDH and reduced graphene (rGO). This material was then utilised in the development of a highly sensitive biosensor for determining CC and HQ. The construction procedure involved modification of glassy carbon electrode (GCE) by the composite and laccase (LAC). Tests conducted by electrochemical methods showed the addition of laccase can greatly improve the response signal of electrochemical measurements on the composite modified GCE to CC and HQ. The electrochemical tests were performed by utilising 0.1 mol/L phosphate-buffer. When separately detected, the detecting linear range for CC by the biosensor was 0.009–0.58 and 0.95–4.4 mmol/L. When it comes to HQ, the range was 0.009–0.57 and 0.95–4.4 mmol/L on the composite/enzyme modified electrode. When the biosensor was used for detecting CC and HQ together, the linear ranges were both 0.019–0.56 and 1.0–4.4 mmol/L. The detection limits calculated for simultaneous detection were 0.75 and 0.47 μmol/L, respectively. The sensor also possessed excellent sensitivity, selectivity and long stability. For applicability of the biosensor, it was used in analysing the two substrates in real water samples, and the recoveries were acceptable.
研究领域:
环境科学
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生物化学
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材料科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Kaiyue Liu,Qiyan Wen,Qichang Zhou,Shuntian Huang,Xinyu Zhao,Shujuan Yang,Furui He,Yuhong Feng,Gaobo yu,Jun Dai,Jiacheng Li
Polysaccharide-based soft particles have wide applications in preparing high phase Pickering emulsions (HIPPEs) because of their adjustable interfacial properties , which can advance the stability of HIPPEs by strengthening their interfacial viscoelasticity . Nevertheless, there is limited research on the interfacial viscoelasticity of soft particles regarding the stability of HIPPEs. We synthesized Alg-CA soft particles by the Ugi reaction, featuring catechol functionality and amphiphilic alginate. These particles can self-assemble under pH stimulation, resulting in a network structure that impacts the interfacial viscoelasticity of HIPPEs. We investigated the relationship between self-assembled microstructure and interfacial viscoelasticity using transmission electron microscopy (TEM) and rheometry. The study indicates that the Alg-CA solution produced a compact network structure at a pH level of 3, leading to the formation of highly stable HIPPEs (with a viscosity of approximately 1000 Pa·s). Additionally, by utilizing emulsion templates, 3D network aerogels with pH-sensitive, consistent microstructures may be developed, which presents a promising approach for designing and producing aerogels with distinct microporous architectures.
研究领域:
材料科学
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食品科学
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化学工程
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DOI
高影响因子
MICROCHIMICA ACTA
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2024
·Vol. 191
·期 8
·1-12
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IF 5.3
Ruan Ya,Li Qiulan,Yang Dezhi,Yang Yaling
Copper selenide nanoparticles (CuSeNP) were synthesized using histidine, ethylenediamine, and sodium selenate as precursors by one-step microwave digestion methods. The as-prepared CuSeNPs exhibit excellent catechol oxidase mimic enzyme and catalase (CAT)-like activities. Dopamine (DA) can be oxidized to aminochrome with H 2 O 2 by CuSeNPs, and the intermediate product aminochrome can further react with α -naphthol to yield a highly fluorescent derivative. It was confirmed that Cr(III) could adsorb on the surface of CuSeNPs and inhibit the production of semiquinone radicals in the reaction system, and the catalytic activity of CuSeNPs was inhibited. The detection mechanisms, kinetics, and catalytic properties of CuSeNPs were systematically investigated. As a result, a novel fluorescence method for the assay of Cr(III) was established. The feasibility of CuSeNP nanozyme in detecting speciation Cr(III) in food samples was explored with satisfactory results. It showed the obvious potential for developing effective and dependable fluorescent detection method for protecting food safety. Graphical Abstract
研究领域:
分析化学
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食品安全
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纳米生物学
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
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2024
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IF 3.7
Jing Li,Hui Sun,Dewei Zhang,Xiaodong Yang,Zhuan Fu,Bin Yu
Previous studies have confirmed that MnOx removes heavy metal ions and organic pollutants from water with dual effects of adsorption and oxidation coupling, significantly improving the ability to remove impurities. Nanometal oxides have a highly reactive surface but tend to agglomerate during preparation and are challenging to recycle after use. A common method is to combine nano-MnO2 with Fe3O4 to prepare magnetic materials for easy recycling. Our previous research has confirmed that catechol (CA) and (3-aminopropyl) triethoxysilane (KH550) can be co-deposited on the surface of polypropylene nonwovens to form a stable CK coating under alkaline conditions. In addition, the coating has many active groups, including hydroxyl groups, amino groups, etc. This study further investigates the secondary reactivity of CK coatings. The coordination of catechol groups and metal ions was used to anchor manganese ions to the coating. Meanwhile, the hydroxyl and amino groups were used to reduce manganese ions to Mn4+ in situ to prepare PP-(CK-MnO2). We found that the sample had an excellent decolorization effect on cationic dyes but was limited to anionic dyes. The decolorization mechanism of cationic dyes was further discussed. The results showed that the decolorization of cationic dyes had a dual effect of adsorption and oxidative degradation. Under acidic conditions, its oxidation properties were enhanced. It can be used as a highly effective decolorizing agent for cationic dyes, and the decolorization behavior is consistent with the first-order kinetics. As the pH increases, its oxidation properties gradually decrease. Although the electrostatic adsorption effect was enhanced, the overall decolorization performance was significantly reduced. Recycling experiments have proved that it can maintain >90% removal rate after five cycles. This study also demonstrated that the CK coating has dopamine-like properties, which can coordinate with metal ions to prepare metal–organic hybrid materials.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
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2019
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IF 5.256
Duanduan Yin,Jian Liu,Xiangjie Bo,Liping Guo
In this study, cobalt-iron selenides embedded in porous carbon nanofibers (CoFe 2 Se 4 /PCF), derived from Prussian blue analogues, was prepared as a novel phenolic sensor. The obtained CoFe 2 Se 4 /PCF nanocomposites show three-dimensional (3D) networks nanostructures that can supply a desirable conductive network to accelerate electron transfer and avoid the aggregation of CoFe 2 Se 4 nanoparticles . Electrochemical detection of hydroquinone (HQ), catechol (CC) and resorcinol (RS), at CoFe 2 Se 4 /PCF modified glassy carbon electrode (GCE) were researched. The results show the obtained 3D CoFe 2 Se 4 /PCF/GCE exhibits excellent electrochemical properties towards the simultaneous testing trace of HQ, CC and RS. The obtained electrode provides wide linear ranges of 0.5–200, 0.5–190 and 5–350 μM and low detection limit of 0.13, 0.15 and 1.36 μM for HQ, CC and RS, respectively. The as-prepared phenolic sensor displays satisfied selectivity and long-term storage stability. In addition, the constructed sensor can be used to determine HQ, CC and RS in actual samples.
研究领域:
材料科学
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分析化学
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DOI
高影响因子
Surfaces and Interfaces
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2026
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IF 6
Linghui Tang,Yue Wang,Hongbin Zhao
Catechol (CC) and hydroquinone (HQ) are ubiquitous environmental pollutants and structural isomers that are difficult to separate by conventional methods. In this work, Sanguisorba officinalis biomass was purified and subsequently pre-carbonized and activated to obtain a refined Sanguisorba -derived carbon (RSC). The carbon material was characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Using differential pulse voltammetry (DPV) in phosphate buffer (pH 6.0), the RSC-modified electrode enabled baseline-resolved, simultaneous determination of CC and HQ over 2–24 μM with excellent linearity. The limits of detection were 0.66 μM for CC and 0.67 μM for HQ, respectively. The sensor exhibited good stability (current retention >80% after 100 consecutive cycles), selectivity, and reproducibility (RSD <2%, n = 5), as well as favorable storage stability (>85% signal retention over 15 days). The proposed sensor allows for the individual determination of HQ and CC in river water via the standard addition method, yielding satisfactory recovery results. These results demonstrate that purified, activated herbal biomass can serve as an effective electrode-sensitive material for electrochemical detection, offering a new avenue for the utilization of medicinal-plant-derived carbons in analytical sensing.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2020
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IF 6.182
Guanhua Zhang,Tiantian Dai,Yue Meng,Lianyang Zhang,Chao Yang,Guoxiang Pan,Zheming Ni,Shengjie Xia
Z-scheme heterojunction catalysts are novel photocatalytic materials with wide application prospects because of their promise for the engineering of band structure to achieve high-speed hot carrier-transfer and strong redox tunability. A bridged-Au Z-scheme heterojunction catalyst (ZnO-Au-ZnAl 2 O 4 ) was synthesized using layered double hydroxides (LDHs) as the backbone. The atomistic and architectural structures, elemental composition and and visible-light absorption of as-prepared photocatalysts were systematically investigated and characterized. The presence of Z-scheme heterojunctions in ZnO-Au-ZnAl 2 O 4 can significantly improve the photocatalytic activity under visible light irradiation with a reaction rate constant of 0.5503 h −1 (ZnO-Au(2%)-ZnAl 2 O 4 ), 27.2 times that of pure ZnO (0.0202 h −1 ) and 9.8 times that of ZnO-ZnAl 2 O 4 (0.0389 h −1 ). We further investigated the reaction kinetics of the heterostructure catalyst in the photodegradation of catechol , where the effect of the catalyst dosage, initial pH, irradiation intensity and reaction temperature were discussed. Based on the mechanism study in the capture and detection of photo-generated radicals and the calculation of band structures by DFT (work function), the successful construction of bridged-Au Z-scheme heterojunction was further proven. Au nanoparticles sandwiched between ZnO and ZnAl 2 O 4 play a vital role for the formation of a built-in electric field (BIEF) between ZnO and ZnAl 2 O 4 , which can significantly facilitate the transfer of hot carriers in the photocatalytic system.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF INORGANIC BIOCHEMISTRY
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2019
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IF 3.224
Tian Zheng,Xinru Wan,Qingchun Zhang,Bo Jin,Ru-Fang Peng
Radionuclide internal contamination can induce chemical and radioactive intoxication and produce harmful free radicals in vivo. At present, administration of chelating agents is the most effective treatment against nuclide contamination. However, traditional studies on chelating agents have ignored the damage caused by free radicals to the body. The present study aimed to develop a type of a bifunctional sequestering agent that can chelates nuclides and scavenges free radicals simultaneously. Therefore, a novel catechol amide-derivatized polyhydroxylated fullerene was designed and prepared. The poor water solubility of fullerene was ameliorated by chemically modifying hydrophilic catechol amide and multiple hydroxyl groups , and obtaining high water-soluble fullerene derivatives. The affinities of chelators were investigated via sulfochlorophenol competitive complexing method and antioxidant capacities were examined by electron paramagnetic resonance . The results revealed the good complexation of the designed and synthesized chelating agent with uranyl ions; and its efficiency in scavenging hydroxyl radicals . This chelating agent showed extremely low toxicity and notable protective effect against oxidative stress on A549 cells. Besides, in U(VI)-exposed A549 cells, immediate treatment with catechol amide-derivatized polyhydroxylated fullerene significantly decreased the lactate dehydrogenase (LDH) release by inhibiting the cellular U(VI) intake, promoting the intracellular U(VI) release and inhibiting the production of intracellular reactive oxygen species (ROS). These results suggest that this fullerene derivative may be a valuable in vivo antioxidant and radionuclide decorporation agent.
研究领域:
放射生物学
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药理学
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毒理学
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2020
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IF 7.1
Li Hou,Yuemei Qin,Tianran Lin,Ying Sun,Fanggui Ye,Shulin Zhao
The synthesized Fe-MIL-88NH 2 was used as a nanozyme and fluorescence probe to successfully construct a selective fluorescent sensing platform for one step determination of catechol. Fe-MIL-88NH 2 exhibited excellent peroxidase mimic property as well as fluorescence property. With the addition of H 2 O 2 and catechol, Fe-MIL-88NH 2 would catalyze the H 2 O 2 to form hydroxyl radicals ( OH). Then, the oxidation of catechol would be triggered by the formed OH, which resulted in the generation of 1, 2-benzoquinone. Afterwards, Michael reaction between the oxidation products of catechol (1, 2-benzoquinone) and Fe-MIL-88NH 2 ligands was triggered and then quenched the fluorescence of Fe-MIL-88NH 2 . The principle of the selective determination of catechol was due to the assistant effect of Michael reaction. Based on the above sensing mechanism, a fluorescent sensing platform for the determination of catechol was established. The limit of detection was 0.0913 μmol L −1 (3S 0, n=8 /K) within a fast response of 10 min. This simple and selective strategy, based on the Michael reaction and the superiority of Fe-MIL-88NH 2 nanozyme, provided a concise sensing platform for catechol determination, which broadened the scope of application of nanozyme and showed a great potential application for on-site testing in food and biology analysis.
研究领域:
分析化学
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生物医学工程
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纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2018
·
IF 2.196
Yangtong Tan,Chao Guo,Yu Qian,Siyu Yang
Liquid–liquid equilibrium (LLE) data for the ternary system of (2-pentanone + catechol + water) and (mesityl oxide + catechol + water) was measured under atmospheric pressure at T = (298.2, 318.2 and 333.2) K. The distribution coefficients and separation factors were employed to assess the efficiency of extracting catechol from water. The nonrandom two liquid and universal quasichemical models were applied to correlate the LLE data, and the corresponding binary interaction parameters were obtained. The topological analysis of LLE correlation was used to confirm that the parameters satisfy the Gibbs stability criteria.
研究领域:
物理化学
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化工热力学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 11
·1-9
·
IF 5.479
Ma Guangran,Xu Hui,Wu Meijuan,Wang Lin,Wu Jianghua,Xu Fugang
A ternary hybrid composed of molybdenum disulfide (MoS 2 ), reduced graphene oxide (rGO) and gold nanoparticles (AuNPs@MoS 2 -rGO) was prepared and used for voltammetric detection of hydroquinone (HQ), catechol (CC) or resorcinol (RC). The composition and structure of the hybrid were characterized in detail. The electrochemical behaviors of a glassy carbon electrode (GCE) modified with the hybrid towards the oxidation of HQ, CC, and RC were investigated using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The results revealed 3D MoS 2 is active for the catalytic oxidation of these isomers. Additional integration with rGO and AuNPs further improves catalysis due to their synergistic interaction. The enhanced catalysis leads to oxidation of HQ, CC and RC at 0.074 V, 0.178 V, and 0.527 V (vs. Ag/AgCl; by CV) with reduced overpotential (20-100 mV) and 8-fold or 3-fold increased peak current compared to those obtained on MoS 2 /GCE, or MoS 2 -rGO/GCE, respectively. Selective detection of one isomer in the presence of the other two was realized by DPV. The linear ranges are 0.1–950 μM, 3–560 μM, and 40–960 μM for HQ, CC, and RC, and the detection limits are 0.04 μM, 0.95 μM, and 14.6 μM, respectively. The sensor also shows good selectivity and displays satisfactory recovery for real sample analysis.
Schematic illustration of the preparation of AuNPs@MoS 2 -rGO hybrid by hydrothermal growth of MoS 2 -rGO and subsequent electrodeposition of gold nanoparticles (AuNPs), and its application for selective detection of hydroquinone, catechol and resorcinol by voltammetry.
研究领域:
分析化学
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材料科学
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电化学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）