NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 8
·3309-3316
·
IF 3.069
Wei Jin,Yanqiu Fu,Weiquan Cai
In this paper, a CuS/graphene oxide (GO)/multiwalled carbon nanotube (MWCNT) nanocomposite was prepared for the first time for ultrasensitive electrochemical non-enzymatic H2O2 detection in the alkaline environment. The morphology and microstructure of the CuS/GO/MWCNT nanocomposite were systematically characterized, in which the novel hybrid architectures of the nanoparticles, nanotubes and nanosheets are determined. As a result, the as-fabricated electrochemical sensor exhibits an excellent H2O2 amperometric response with a wide linear range from 0.45 mM to 60 mM, a low detection limit of 0.6 μM and an ultra-high sensitivity of 386 μA mM−1 cm−2. Besides, the long-term stability and outstanding reproducibility were also evaluated, suggesting the promising potential for the determination of H2O2 in practical applications.
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
Journal of the Taiwan Institute of Chemical Engineers
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2025
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IF 6.3
Zhike Wang,Yanan Chen,Cunling Ye
Background The detection of tetracyclines (TCs) has been needed due to their irreversible damage to the environment and human health. Methods A novel non-conventional luminophore was synthesized by oxidizing β-cyclodextrin (β-CD) with H 2 O 2 . The oxidized β-CD (β-CD ox ) has clustering-triggered emission (CTE) property, and exhibits blue fluorescence emission in solid powder and solution. The β-CD ox and Eu 3+ ions were simply mixed to fabricate a ratio fluorescence probe for detection of TC, OTC and DOX. In the presence of TCs, the red fluorescence signal of Eu 3+ was significantly amplified via the inclusion interaction of β-CD ox and the TCs-induced antenna effect, while the blue emission of β-CD ox was reduced, allowing the ratio probe to reliably recognize TCs. Findings Under the optimized conditions, the ratio of I 614 /I 430 of the developed probe displayed wide linear ranges of 1.0–30.0 µM, 1.0–30.0 µM and 1.0–40.0 µM for TC, OTC and DOX, respectively, and the limits of detection for TC, OTC and DOX were 0.25 µM, 0.23 µM and 0.48 µM, respectively. In addition, the probe was successfully applied to detect TCs in water samples. Importantly, this study has developed non-conventional luminophores-based ratio fluorescence probe, and has expanded the potential application fields of non-conventional luminophores.
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
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2025
·
IF 5.1
Tariq Ali,Yiwei Li,Bingjie Fang,Saleem Raza,Yeyuan Xiao
Photocatalysis can decolorize dye-laden wastewaters using light, but practical catalysts often suffer from narrow absorption, charge recombination, and stability limits. Here we synthesize a carbonate-intercalated cobalt–aluminum layered double hydroxide hosting cobalt-oxide nanocluster (CoAl-LDH/CoOx) via a one-pot hydrothermal route and evaluate its performance for dye decolorization and UV/H2O2 treatment of real textile wastewater. Under UV irradiation, CoAl-LDH/CoOx accelerates discoloration of methyl orange (MO) and Congo red (CR), following pseudo-first-order kinetics (e.g., MO: ∼98% removal at 5 mg L−1 in 100 min; CR: ∼100% at 100 mg L−1 in 100 min; kapp up to 0.14 min−1). On real textile wastewater (ADMI0 = 608.1), UV/H2O2 with 0.5 g L−1 catalyst achieved ∼80% American Dye Manufacturer's Institute (ADMI) removal in 120 min at 48.96 mM H2O2; outdoor sunlight tests removed 82.5% (raw influent) and 50.8% (biologically treated effluent) over 20 h. Scavenger tests and EPR spin-trapping implicate h+ and ˙O2− as dominant species under UV, with ˙OH contributing when H2O2 is present. Five-cycle tests indicate stable activity. The one-pot CoAl-LDH/CoOx heterostructure provides a robust, recyclable platform for interfacial charge-transfer-assisted photocatalysis on realistic effluents and motivates follow-up on mineralization and leaching.
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产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
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2025
·
IF 3.1
Ruifeng Wang,Jiabao Bai,Zhengtao Qiu,Yelin Ding,Chun Sun
Hydrogen peroxide (H 2 O 2 ) is a versatile green oxidant with wide-ranging applications. In this study, a bismuth ion (Bi 3+ )-gradient-doped indium sulfide (In 2 S 3 ) photocatalyst with abundant sulfur vacancies (V s ) was successfully prepared via a polyvinylpyrrolidone (PVP)-assisted hydrothermal method combined with solid-state grinding. The synergy of Bi 3+ doping and V s narrows the bandgap and constructs a built-in electric field for directional carrier transport, enabling the catalyst to achieve a H 2 O 2 production rate of 784.35 μmol g −1 h −1 under visible light (λ ≥ 420 nm). This work establishes a novel paradigm for designing high-performance sulfide photocatalysts.
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
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2016
·
IF 5.886
Shuxia Xu,Xianming Li,Chaobi Li,Jialin Li,Xinfeng Zhang,Peng Wu,Xiandeng Hou
Exploration of quantum dots (QDs) as energy acceptors revolutionizes the current chemiluminescence resonance energy transfer (CRET), since QDs possess large Stokes shifts and high luminescence efficiency. However, the strong and high concentration of oxidant (typically H2O2) needed for luminol chemiluminescence (CL) reaction could cause oxidative quenching to QDs, thereby decreasing the CRET performance. Here we proposed the use of bienzyme–QDs bioconjugate as the energy acceptor for improved CRET sensing. Two enzymes, one for H2O2 generation (oxidase) and another for H2O2 consumption (horseradish peroxidase, HRP), were bioconjugated onto the surface of QDs. The bienzyme allowed fast in situ cascaded H2O2 generation and consumption, thus alleviating fluorescence quenching of QDs. The nanosized QDs accommodate the two enzymes in a nanometric range, and the CL reaction was confined on the surface of QDs accordingly, thereby amplifying the CL reaction rate and improving CRET efficiency. As a result, CRET efficiency of 30–38% was obtained; the highest CRET efficiency by far was obtained using QDs as the energy acceptor. The proposed CRET system could be explored for ultrasensitive sensing of various oxidase substrates (here exemplified with cholesterol, glucose, and benzylamine), allowing for quantitative measurement of a spectrum of metabolites with high sensitivity and specificity. Limits of detection (LOD, 3σ) for cholesterol, glucose, and benzylamine were found to be 0.8, 3.4, and 10 nM, respectively. Furthermore, multiparametric blood analysis (glucose and cholesterol) is demonstrated.
研究领域:
生物化学
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分析化学
·
纳米生物学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Hua Su,Dan-Dan Liu,Meng Zhao,Wei-Liang Hu,Shan-Shan Xue,Qian Cao,Xue-Yi Le,Liang-Nian Ji,Zong-Wan Mao
Polyvinylpyrrolidone-stabilized iridium nanoparticles (PVP-IrNPs), synthesized by the facile alcoholic reduction method using abundantly available PVP as protecting agents, were first reported as enzyme mimics showing intrinsic catalase- and peroxidase-like activities. The preparation procedure was much easier and more importantly, kinetic studies found that the catalytic activity of PVP-IrNPs was comparable to previously reported platinum nanoparticles. Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) characterization indicated that PVP-IrNPs had the average size of approximately 1.5 nm and mainly consisted of Ir(0) chemical state. The mechanism of PVP-IrNPs′ dual-enzyme activities was investigated using XPS, Electron spin resonance (ESR) and cytochrome C-based electron transfer methods. The catalase-like activity was related to the formation of oxidized species Ir(0)@IrO2 upon reaction with H2O2. The peroxidase-like activity originated from their ability acting as electron transfer mediators during the catalysis cycle, without the production of hydroxyl radicals. Interestingly, the protective effect of PVP-IrNPs against H2O2-induced cellular oxidative damage was investigated in an A549 lung cancer cell model and PVP-IrNPs displayed excellent biocompatibility and antioxidant activity. Upon pretreatment of cells with PVP-IrNPs, the intracellular reactive oxygen species (ROS) level in response to H2O2 was decreased and the cell viability increased. This work will facilitate studies on the mechanism and biomedical application of nanomaterials-based enzyme mimic.
研究领域:
生物化学
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纳米医学
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细胞生物学
✓ 已验证
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
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2012
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IF 5.602
Xiangheng Niu,Chen Chen,Hongli Zhao,Yan Chai,Minbo Lan
Novel snowflake-like Pt–Pd bimetallic nanoclusters (Pt–PdBNC) were synthesized on a screen-printed gold nanofilm electrode (SPGFE) substrate by electrochemically reducing precursors with a new constant potential/multi-potential step deposition strategy. The electrocatalytic behavior of the modified electrode (SPGFE/Pt–PdBNC) towards H 2 O 2 was investigated. The results indicate that the as-prepared Pt–PdBNC significantly enhances the electrochemical reduction of H 2 O 2 in neutral media, exhibiting preferable electrocatalytic performance compared to Pt and Pd monometallic nanoclusters . Under optimum conditions, SPGFE/Pt–PdBNC offers linear responses for H 2 O 2 in the concentration range from 0.005 to 6 mM with an ultrahigh sensitivity of 804 mA M −1 cm −2 and excellent selectivity. Furthermore, glucose oxidase was immobilized on the Pt–PdBNC structure, and the fabricated biosensor presents favorable properties for glucose sensing.
研究领域:
分析化学
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电化学
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生物传感技术
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DOI
高影响因子
Applied Sciences-Basel
·
2021
·Vol. 11
·期 5
·2018
·
IF 2.679
Yang Chen,Qi Tian,Yongsheng Tian,Jiawei Cui,Guanghui Wang
A mesoporous silica-supported molybdenum oxide catalyst with a cerium(Ce) modifier was prepared by in situ synthesis and used in a hydrogen peroxide (H2O2) system for the desulfurization of dibenzothiophene (DBT), benzothiophene (BT), and 4,6-dimethyldibenzothiophene (4,6-DMDBT) fuel oils. The catalytic performance of the catalyst was studied. The catalyst was characterized by Fourier Transform Infra-Red (FT-IR), X-ray diffraction (XRD), Brunner−Emmet−Teller (BET), and X-ray Photoelectron Spectroscopy (XPS). The influences ofm(catalyst)/m(fuel oil),v(H2O2)/v(fuel oil), reaction temperature, and reaction time were investigated. The catalyst had excellent catalytic oxidation desulfurization performance under moderate operational conditions. The catalytic performance was in the order DBT > 4,6-DMDBT > BT. The kinetic analysis results showed that the reaction was a pseudo first-order kinetics process and the apparent activation energies of DBT, BT, and 4,6-DMDBT were 46.67 kJ/mol, 56.23 kJ/mol, and 55.54 kJ/mol, respectively. The reaction products of DBT, BT, and 4,6-DMDBT were DBTO2, BTO2, and 4,6-DMDBTO2, respectively. The recycling experiments indicated that DBT, BT, and 4,6-DMDBT removal could still reach levels of 94.0%, 63.0%, and 77.9% after five cycles.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
·
IF 10.588
Xia Li,Jie He,Jian Lu,Yi Zhou,Yanbo Zhou
Fenton technology performs well in high-risk roxarsone (ROX) removal, but it is limited by the high H 2 O 2 transportation and storage risks. Herein, FeS 2 decorated resorcinol-formaldehyde resins (FeS 2 -RFR) were successfully prepared to in-situ produce and utilize H 2 O 2 for efficient removal of ROX. Under solar light illumination, resorcinol-formaldehyde resins (RFR) efficiently generated a high concentration of H 2 O 2 , with a yield of 500 μmol g −1 h −1 . FeS 2 can in-situ decompose H 2 O 2 to generate · OH, participating in the oxidation of ROX. As a result, the FeS 2 -RFR catalyst degraded more than 97% of ROX within 2 h and ROX was selectively degraded into low-toxic As(V), which can be simply removed by traditional adsorption or precipitation processes. During the degradation of ROX, · OH played a dominant role. Moreover, the cations (Na + , K + , and Ca 2+ ), anions (SO 4 2− , Cl − ), and humic acid had no noticeable inhibition effect on ROX removal. Furthermore, FeS 2 -RFR can still remove 70% of ROX even after three cycles, proving that this in-situ photo-Fenton system exhibited stability. This study innovatively proposed a double-active site FeS 2 -RFR photocatalyst for in-situ production and activation of H 2 O 2 and showed a sustainable and eco-friendly way for organoarsenic compounds degradation.
研究领域:
环境科学
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化学工程
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材料科学
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DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Zhangbin Pan,Zhenqi Du,Junqi Jia,Aiguo Lin,Yongqiang Wang,Wuchang Song,Shaohua Sun,Hongbo Wang,Ruibao Jia,Lian Hou
2,6-dichloro-1,4-benzoquinone (DCBQ), a typical representative of Halobenzoquinones, is an emerging aromatic disinfection by-product (DBP) with high toxicity and carcinogenicity , generated commonly through the chlorination in the drinking water disinfection process while there is still a lack of research on its removal. In this study, the effects of ultraviolet-based advanced oxidation processes (UV-AOPs) on the degradation of DCBQ were evaluated. The results showed that UV-AOPs are effective in degrading DCBQ. The removal of DCBQ by UV/H 2 O 2 /O 3 was more significant than by UV/H 2 O 2 or UV/O 3, achieving a 96.7% removal rate at both the O 3 and H 2 O 2 doses of 1 mg/L. The results also indicated the alkaline and weakly acidic environments could facilitate the degradation of DCBQ, inorganic anions could inhibit DCBQ degradation and the degree of inhibition increased as the matrix concentration increased. The degradation of DCBQ was inhibited more by the CO 3 2− than the other matrix components, such as Cl − and NO 3 − . It was shown by the density functional theory simulations and the ultrahigh-performance liquid chromatography (UPLC) - Orbitrap mass spectra that the electrons in DCBQ are mainly on the chlorine atom connected to the carboatomic ring and that OH• can attack the chlorine atom to cause de-chlorination. The DCBQ degradation pathway may involve the oxidation of DCBQ to 3-hydroxy-2,6-DCBQ (HO–DCBQ) and 3,5-dichloro-1,2,4-pyrogallol, the further degradation of intermediate products by OH• to dechlorinated forms of HO–DCBQ and DCBQ.
研究领域:
环境科学
·
水处理工程
·
化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Xiaoyu Zhao,Mengyuan Zhang,Zhenghua Zhang
The conventional hydrothermal bottom-up synthesis for preparing carbon dots (CDs) usually requires stringent conditions and high energy consumption, whereas the quantum yield (QY) of CDs remains at a relatively low level. Herein, CDs exhibiting strong blue photoluminescence (PL) with an ultra-high QY (up to 94.4%) were prepared via a simple one-step microwave-assisted route using citric acid (CA) and o-phenylenediamine (o-PD) as precursors. The operating conditions, including reaction time, solvent species, amount of solvent, and precursor molar ratio, were optimized. The CDs synthesized within 3.5 min of microwave heating in ethylene glycol (EG) at a CA-to-PD molar ratio of 5:1 exhibited the highest QY (94.4%). A synergistic PL mechanism of the molecule state and carbon core state emissive centers was proposed according to the characterization results of CDs. Moreover, the proof-to-concept H 2 O 2 fluorescent detection performances of the prepared CDs confirmed their great application potential as probe materials. Through directly mixing the CD products and H 2 O 2 , a strong PL response could be rapidly detected after merely 1 min, and the detection limit was calculated to be as low as 8.6 nM. Besides, the CDs exhibited high biocompatibility, making them suitable for in-vivo detection of H 2 O 2 . Therefore, this work provides a novel and efficient approach for synthesis of ultra-high QY CDs that can be directly applied in biological detection.
研究领域:
材料科学
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分析化学
·
生物医学工程
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DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Boyin Yan,Songxue Wang,Zhiquan Liu,Da Wang,Wenxin Shi,Fuyi Cui
In this work, the UV 254 /H 2 O 2 process was utilized to remove β-N-methylamino- l -alanine (BMAA), a kind of cyanobacteria neurotoxin, and the influence of reaction parameters and environmental factors on the degradation of BMAA has been systematically investigated. The results showed that BMAA could be effectively removed in the UV 254 /H 2 O 2 system compared to UV or H 2 O 2 alone and OH was confirmed as the main ROS to degrade BMAA. The degradation rate of BMAA increased first and then decreased with the increase of pH and the maximum k obs was 0.1545 min −1 obtained at pH 9. The removal of BMAA in the UV 254 /H 2 O 2 system was inhibited in actual water, while the degradation rate of BMAA in actual water could still exceed 90% by appropriately extending the reaction time. The decrease in the degradation efficiency of BMAA in actual water was primarily due to the ultraviolet light absorption and competition effects of NOM, and anions (Cl − and HCO 3 − ) would also inhibit the degradation of BMAA. Five by-products ([M − H] - = 118, 103, 88, 87 and 59) were identified in this study and the degradation pathways of BMAA were proposed. The production of by-products was attributed to the fracture of the C–N bond and hydroxylation reaction. This study is worthwhile to deepen the understanding of the degradation mechanism of BMAA in the UV 254 /H 2 O 2 system.
研究领域:
环境科学
·
毒理学
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DOI
高影响因子
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