NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 46
·22419-22426
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IF 3.925
Liran Liu,Hanping Fu,Yating Zeng,Li Feng,Tianxiang Zhang,Qingshuang Liang,Xiufeng Xiao
The development of high-efficiency economic photocatalysts for the production of hydrogen peroxide (H2O2) is of great significance for solar-to-fuel conversion. Bismuth oxychloride (BiOCl) shows great potential for photocatalytic H2O2 production, but the rapid recombination of electron–hole pairs reduces its photocatalytic performance. Herein, a series of Bi nanoparticle modified BiOCl (Bi/BiOCl) composites is constructed by an in situ chemical reduction to boost the spatial charge separation and transportation to enhance the photocatalytic performance for H2O2 production. Benefiting from the synergistic effects of localized surface plasmon resonance, the formation of Schottky barriers, and the in situ fabricated heterojunction that results in strong interfacial forces and tight contact, the obtained Bi/BiOCl composites exhibit enhanced photocatalytic capability for H2O2 production; the best sample can enable an impressive H2O2 production rate of 108 mmol g−1 h−1, which is much higher than that of individual BiOCl. The present work provides a clear understanding of the mechanisms of Bi nanoparticle modified BiOCl composites for photocatalytic H2O2 production, which will be useful for the development of catalysts toward solar-to-fuel conversion.
研究领域:
材料科学
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能源化学
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环境科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Yuxuan He,Yongming Wang,Jin Qian,Kailin Xu,Bianhe Lu,Sijing Tang,Yin Liu,Junwei Shen
Photocatalysis for H 2 O 2 production suffers from low carrier utilization and slow reaction kinetics. Herein, a photocatalytic system supported by a SrCoO 3 -MoS 2 (SCOS) heterojunction, which possessed a unique S-O electron transport channel, was proposed to facilitate H 2 O 2 production under condition where glycerol served as a sacrificial agent. The SCOS heterojunction achieved a remarkable yield of 15.90 mmol g −1 h −1 H 2 O 2 production, 3.7 times higher than the base component SCO. The construction of the heterojunction enriched the oxygen vacancies on the catalyst surface, facilitated photogenerated charge separation, and promoted the adsorption of O 2 , reducing the oxygen reduction reaction (ORR) energy barrier. Besides, glycerol served as a unique proton donor, efficiently captured holes to enhance H 2 O 2 production, and generated valuable by-products including glyceric acid and dihydroxyacetone. Furthermore, SCOS exhibited excellent stability over repeated cycles with consistent H 2 O 2 yields. This study offers an efficient photocatalytic system and demonstrates glycerol’s potential in green oxidation processes.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
Materials
·
2016
·Vol. 9
·期 8
·690
·
IF 2.728
Qing-Qing Dai,Jun-Li Ren,Feng Peng,Xiao-Feng Chen,Cun-Dian Gao,Run-Cang Sun
Acylated xylan-based magnetic Fe3O4nanocomposite hydrogels (ACX-MNP-gels) were prepared by fabricating Fe3O4nanoctahedra in situ within a hydrogel matrix which was synthesized by the copolymerization of acylated xylan (ACX) with acrylamide andN-isopropylacrylamide under ultraviolet irradiation. The size of the Fe3O4fabricated within the hydrogel matrix could be adjusted through controlling the crosslinking concentrations (C). The magnetic hydrogels showed desirable magnetic and mechanical properties, which were confirmed by XRD, Raman spectroscopy, physical property measurement system, SEM, TGA, and compression test. Moreover, the catalytic performance of the magnetic hydrogels was explored. The magnetic hydrogels (C = 7.5 wt %) presented excellent catalytic activity and provided a sensitive response to H2O2detection even at a concentration level of 5 × 10−6mol·L−1. This approach to preparing magnetic hydrogels loaded with Fe3O4nanoparticles endows xylan-based hydrogels with new promising applications in biotechnology and environmental chemistry.Keywords:xylan;acylated xylan;magnetic hydrogels;Fe3O4nanoparticles;H2O2detection
研究领域:
材料科学
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化学工程
·
分析化学
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生物技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 4
·1752-1758
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IF 2.047
Tian Wenjing,Ding Xu,Jiang Feifei,Du Xinrui,Shi Jipeng,Zhang Ji
Research into metal nanoparticles has increased, and they have been increasingly used in non-enzymatic sensor applications. However, there have been few reports on the use of natural products to prepare non-precious metal nanoparticles in an eco-friendly (green) manner. Studies were conducted on Cu nanoparticles (Cu NPs) prepared by the use of natural gallic acid (GA). This method is environmentally friendly and can be applied to H 2 O 2 detection. As-obtained Cu NPs were characterized by x-ray photoelectron spectroscopy (XPS), powder x-ray diffraction (XRD), and transmission electron microscopy (TEM). When applied to H 2 O 2 detection, Cu NPs had good sensitivity, stability, and anti-interference properties. Its electrochemical performance is no less than that of precious metal nanomaterials. Cu NPs mainly exhibit good sensitivity, reaching 5.74 μA mM -1 cm -2 ; the concentration range thereof is 1–20 mM. The process of constructing nanoparticles in this work used natural products, making it environmentally friendly and proving the practicality of constructing non-precious metal nanoparticles and the feasibility of their application to H 2 O 2 detection. Graphic Abstract
研究领域:
材料科学
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环境科学
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分析化学
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Xiao-Yuan Wang,Jian Lv,Qin Hong,Ze-Rui Zhou,Da-Wei Li,Ruo-Can Qian
H2O2 is an essential signaling molecule in living cells that can cause direct damage to lipids, proteins, and DNA, resulting in cell membrane rupture. However, current studies mostly focus on probe-based sensing of intracellular H2O2, and these methods usually require sophisticated probe synthesis and instruments. In particular, local H2O2 treatment induces cell membrane rupture, but the level of cell membrane destruction is unknown because the mechanical properties of the cell membrane are difficult to accurately determine. Therefore, highly sensitive and label-free methods are required to measure and reflect mechanical changes in the cell membrane. Here, using an ultrasmall quartz nanopipette with a tip diameter less than 90 nm as a nanosensor, label-free and noninvasive electrochemical single-cell measurement is achieved for real-time monitoring of cell membrane rupture under H2O2 treatment. By spatially controlling the nanopipette tip to precisely approach a specific location on the membrane of a single living cell, stable cyclic membrane oscillations are observed under a constant direct current voltage. Specifically, upon nanopipette advancement, the mechanical status of the cell membrane can be sensibly displayed by continuous current versus time traces. The electrical signals are collected and processed, ultimately revealing the mechanical properties of the cell membrane and the degree of cell apoptosis. This nanopipette-based nanosensor paves the way for developing a facile, label-free, and noninvasive strategy to assay the mechanical properties of the cell membrane during external stimulation at the single-cell level.
研究领域:
生物医学工程
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细胞生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yingying Fan,Junjie Liu,Xu Han
Photocatalytic generation of oxidative free radicals is an effective method to eliminate viruses and bacteria in air. Nevertheless, the underlying mechanisms governing the gas-phase sterilization remain unclear. In this study, the self-doped Bi 2.15 WO 6 was synthesized to prepare the Bi 2.15 WO 6 coating. In the presence of Bi 2.15 WO 6 coating, the average logarithmic degradation efficiencies ( LDEs ) are 3.82 and 3.07 for E. coli and S. aureus , respectively under UV illumination for 12.9 s, indicating its desirable sterilization efficiencies. In addition, the sterilization rates of E. coli and S. aureus slightly decrease by 3 % and 6 % after 30-repeated cycles, indicating the high stability of this catalytic coating. The 2,7-dichlorofluorescein (DCF) fluorescence experiments and SEM analysis indicate that reactive oxygen species (ROS) produced by Bi 2.15 WO 6 have effectively destroyed cell structure to achieve the complete inactivation. The N,N -diethyl-p-phenylenediamine sulfate (DPD) and radical trapping experiments further reveal that H 2 O 2 is the primary oxidizing species, and its yields are linearly proportional to the LDE values. The produced H 2 O 2 is further decomposed to •OH under UV irradiation to kill bacteria. Raman analysis confirms the presence of the intermediate species of surface ≡Bi-OO• superoxo and/or ≡Bi-OOH peroxo groups on Bi 2.15 WO 6 , which are the precursors of H 2 O 2 . In addition, the 3-D filter facilitates sterilization by the Bi 2.15 WO 6 in that it prolongs the duration of free radical via physically intercepting bioaerosols, thus apparently improving the degradation rate. This study provides new insights on the sterilization mechanism involved in the gas-phase photocatalytic processes.
研究领域:
环境科学
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生物学
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产品关联
DOI
高影响因子
ELECTROANALYSIS
·
2020
·Vol. 33
·期 4
·947-955
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IF 2.544
Yanqiu Fu,Jinrui Li,Wei Jin,Zhonggang Liu
In this work, a dual-functional electrochemical sensor has been proposed based on Sn-doped defective Bi 2 S 3 (TDDB) microspheres, which exhibited the excellent electrochemical performance on Pb(II) and H 2 O 2 detection. The TDDB offered a satisfied detection limit of 8.0 nM towards Pb(II) with a sensitivity of 96.7 μA ⋅ μM −1 . As a H 2 O 2 sensor, a high sensitivity of 3540 μA mM −1 cm −2 was obtained in a linear range from 0.45 mM to 10 mM with a detection limit of 10 nM. Moreover, the electrochemical detection of Pb(II) in Taihu Lake and H 2 O 2 in human serum was achieved with high reliability and good recovery.
研究领域:
分析化学
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环境科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Science of Advanced Materials
·
2019
·Vol. 11
·期 6
·842-853
·
IF 1.158
Xu Qiyao,Liu Hongxia,Zheng Huaili,Liang Jianjun
In this study, a new cationic polyacrylamide (CPAM) was successfully synthesized through UV-H2O2-initiated polymerization technique using acryloyloxyethyl trimethyl ammonium chloride (DAC) and acrylamide (AM) as monomers, and applied to sludge dewatering experiments.
Parameters affecting the molecular weight and conversion of the polymers, including total monomer concentration, monomer concentration of DAC, H2O2 concentration, pH and illumination time were examined. Fourier transform infrared spectroscopy (FT-IR), 1H nuclear
magnetic resonance spectroscopy (1H NMR), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM) were employed to characterize the properties of the polymers. The results showed that CPAM was successfully synthesized and possessed a coarse and porous surface morphology
and inferior thermal stabilities. When the dosage of polymer was 40 mg L–1 and the initial sludge pH value was 7.0, PAD-3 (cationic degree: 40%, molecular weight: 6.89 × 106 Da) showed a more excellent sludge dewatering performance (FCMC: 70.6% SRF: 2.8 ×
1012 m · kg –1; d
50: 436.802 μm, Df
: 1.59). During the sludge flocculation process, three mechanisms containing charge neutralization, patching and bridging co-contributed to a prominent flocculation performance.
研究领域:
环境科学
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高分子化学
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Biyang Zhu,Dongxiao Sun-Waterhouse,Lijun You
UV/H 2 O 2 process is increasingly used to degrade carbohydrates, though the underlying mechanisms remain unclear. This study aimed to fill this knowledge gap, focusing on mechanisms and energy consumption involved in hydroxyl radical (•OH)-mediated degradation of xylooligosaccharides (XOSs) in UV/H 2 O 2 system. Results showed that UV photolysis of H 2 O 2 generated large amounts of •OH radicals, and degradation kinetics of XOSs fitted with a pseudo-first-order model. Xylobiose (X 2 ) and xylotriose (X 3 ), main oligomers in XOSs, were attacked easier by •OH radicals. Their hydroxyl groups were largely converted to carbonyl groups and then carboxy groups . The cleavage rate of glucosidic bonds was slightly higher than that of pyranose ring, and exo -site glucosidic bonds were more easily cleaved than endo -site bonds. The terminal hydroxyl groups of xylitol were more efficiently oxidized than other hydroxyl groups of it, causing an initial accumulation of xylose . Oxidation products from xylitol and xylose included ketoses , aldoses , hydroxy acids and aldonic acids , indicating the complexity of •OH radical-induced XOSs degradation. Quantum chemistry calculations revealed 18 energetically viable reaction mechanisms, with the conversion of hydroxy-alkoxyl radicals to hydroxy acids being the most energetically favorable (energy barriers <0.90 kcal/mol). This study will provide more understanding of •OH radicals-mediated degradation of carbohydrates.
研究领域:
生物化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IMMUNOLOGICAL INVESTIGATIONS
·
2024
·
IF 2.9
Keke Huang,Wenhan Fu,Anquan Wang,Gongwen Du,Hao Tang,Li Yin,Zongsheng Yin,Weilu Gao
Background Chondrocyte oxidative stress and apoptosis are critical factors contributing to the pathogenesis of osteoarthritis (OA). Methionine sulfoxide reductase B2 (MSRB2) is a mitochondrial protein that protects cells from oxidative stress and is involved in apoptosis. This study aimed to investigated the expression of MSRB2 in articular cartilage tissues and elucidated its effect on H2O2-stimulated chondrocytes.Methods Human chondrocytes were cultured in Dulbecco’s modified Eagle’s medium (DMEM)/F12. MSRB2 overexpression in chondrocytes was achieved by transfecting with an MSRB2 overexpression plasmid. Western blot, quantitative RT-PCR, Immunofluorescence staining, and TUNEL assay were employed in this study.Results MSRB2 expression was found to be reduced in OA patients. Furthermore, overexpression of MSRB2 in H2O2-induced chondrocytes mitigated apoptosis and enhanced cell viability. Elevated MSRB2 expression diminished chondrocyte ROS contents, decreased cytochrome C (Cyc) in the cytoplasm, and regulated mitochondrial membrane potential to maintain mitochondrial homeostasis. Interestingly, knockdown of charged multivesicular body protein 5 (CHMP5) led to a decreased inMSRB2 expression in chondrocytes. Additionally, protein levels of CHMP5 and MSRB2 were reduced in H2O2-stimulated chondrocytes, and silencing CHMP5 reduced MSRB2 expression. Knockdown of CHMP5 increased cleaved caspase-3 expression in H2O2-induced chondrocytes and elevated TUNEL-positive chondrocytes.Conclusion MSRB2 decreased in OA, and overexpression of MSRB2 alleviated oxidative stress and apoptosis of chondrocyte.
研究领域:
骨科
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细胞生物学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 48
·38021-38029
·
IF 3.84
Xun'an Ning,Lingzhi Shen,Jian Sun,Chaoping Lin,Yaping Zhang,Zuoyi Yang,Shujun Chen
The degradation of polycyclic aromatic hydrocarbons (PAHs) in textile dyeing sludge by O3/H2O2 treatment was investigated. Fluorene (Fl), phenanthrene (Ph), anthracene (An) and dibenz[a,h]anthracene (DBA) were selected to represent typical PAHs. The effect of radical inhibitors, H2O2, O3 flow rate, pH and reaction time on the degradation of the four types of PAHs were examined to determine the optimal conditions for degradation and to clarify the mechanism(s) of PAHs degradation. The results indicated that the combined O3/H2O2 treatment resulted in high removal rates of the selected PAHs: 89% for Fl, 66% for Ph, 71% for An and 81% for DBA. These results correspond to the optimal conditions of an O3 flow rate of 0.4 L min−1, a H2O2 concentration of 0.60 mol L−1, a reaction time of 15 min and pH 7. The removal rate (within 30 min) increased by 5% for Fl, 27% for Ph, 21% for An and 5% for DBA through the addition of H2O2 to the O3 process. The O3 flow rate, reaction time and pH were the key parameters affecting PAH degradation with multiple interacting factors (p < 0.05) by the O3/H2O2 treatment. The degradation of the PAHs can be fitted well by pseudo-first-order kinetics (R2 = 0.9656). The combined O3/H2O2 treatment is demonstrated to be an efficient approach for the degradation of PAHs in textile dyeing sludge.
研究领域:
环境工程
·
化学工程
·
废水处理
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Min Zhao,Ting Li,Yizhan Zhang,Jiaming Gan,Yiting Zhao,Xin Yu,Lei Wang
Advanced oxidation technology of KrCl excimer lamp activated H 2 O 2 (UV 222 /H 2 O 2 ) have been received widespread attention in the field of water treatment recently, due to the higher radical yield and environmentally friendly nature compared to UV 254 /H 2 O 2 . In this investigation, four representative parahalogenated phenols (HPs) degradation kinetic and mechanisms by UV 222 alone and UV 222 /H 2 O 2 were studied, respectively. The results showed that the photolysis rate constants ( k obs ) under UV 222 followed the order of p -Chlorophenol ( p -CP) > p -Fluorophenol ( p -FP) > p -Bromophenol ( p -BP) > p -Iodophenol ( p -IP), and the degradation rate constants ( k obs ) by UV 222 /H 2 O 2 followed the order of p -FP > p -CP > p -BP > p -IP. The molar absorption coefficient ( ε 2 22nm ) and quantum yield ( Φ 222nm ) of HPs photolysis were measured. Kinetic model simulating results are in fair agreement with the experimental results. Through HPLC-MS analysis and DFT calculation, the impact of halogen ions on the degradation kinetics of HPS by UV 222 and UV 222 /H 2 O 2 was found, the possible reaction pathways and mechanisms were proposed. Compared with UV 254 /H 2 O 2 for removing p -CP, UV 222 /H 2 O 2 was much more energy efficient.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）