CHEMISTRY-A EUROPEAN JOURNAL
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2024
·
IF 3.9
Ziyu Liu,Xinyu Wang,Pengye Zhang,Haonan Zhang,Shuai Wang,Gaiyan Jiao,Wenting Wu,Mingbo Wu
The photosynthesis of hydrogen peroxide (H2O2) from oxygen (O2) represents a promising catalytic pathway, the limited efficiency of the oxygen reduction constitutes a primary barrier to enhancing production. In this content, alkali metal potassium (K+) and Br-doped g-C3N4 photocatalysts (K-CN) were successfully constructed by one-pot method. The introduction of K+ is not only beneficial to the transmission of space charge and the separation efficiency of photogenerated carriers, but also promotes the efficient production of H2O2 by 2e- oxygen reduction reaction. The introduction of Br- promotes O2 converted to triplet state and triggers energy transfer process to increase 1O2 production, O2 adsorption was facilitated through regulating the oxygen evolution (O2→1O2), which is beneficial to the subsequent oxygen reduction process. The results showed that the H2O2 yield of 0.05 K-CN catalyst reached 26.0 mmol g-1 h-1, which was more than 5 times that of pure g-C3N4.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Xuan Liu,Chang’an Wang,Tao Zhu,Qiang Lv,Defu Che
In this paper, the simultaneous removal of SO 2 and NO x catalyzed by Fe-Mo mixed oxides at varying Mo/Fe atomic ratios was reported for the first time with the aim of reducing H 2 O 2 consumption and elucidating the roles of Fe and Mo species in the catalytic process. Fe-Mo mixed oxides with varying Mo/Fe atomic ratios were synthesized and the catalytic performances were systematically studied. The catalyst with Mo/Fe atomic ratio of 2.0 exhibited the highest activity, with which removal efficiencies of 89.4 % for NO x and 100 % for SO 2 can be attained at extremely low H 2 O 2 dosage. Products analysis revealed that SO 2 was mainly removed via wet scrubber, while the adequate oxidation resulting from OH radicals was the prerequisite for NO x removal. The redox pair of Fe 2+ /Fe 3+ played a significant role in decomposing H 2 O 2 , while Mo species had double effect on catalytic activity. Higher Mo content resulted in abundant oxygen vacancies and stronger surface acidity, which favored OH formation. However, the excessive Mo content involved severe surface Mo enrichment and remarkably reduced the active sites of Fe species. The H 2 O 2 /Fe-Mo catalyst system showed excellent stability and had a promising prospect for simultaneously removing SO 2 and NO x in coal-fired flue gas.
研究领域:
环境科学
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催化化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 33
·17387-17392
·
IF 3.708
Wengfeng Zhu,Jian Zhang,Zhenchao Jiang,Weiwei Wang,Xiaoheng Liu
In this paper, bright and high-quality carbon dots (CDs) were prepared by refluxing a membranous carbonized β-cyclodextrin in nitric acid. The structure and optical properties of the CDs were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), fluorescence spectrophotometry (FL), X-ray diffraction (XRD) and Raman spectroscopy. The mechanism for the formation of the CDs is also discussed. As-prepared CDs could be used as peroxidase mimics for the detection of H2O2. The results indicate that the CDs are capable of rapid and sensitive detection of H2O2 in the linear range from 2 × 10−6 to 5 × 10−4 mol L−1 and the limit of detection of H2O2 is as low as 1 × 10−6 mol L−1. More importantly, the peroxidase-like activity of the CDs is expanded to the detection of some oxidative ions (such as Fe3+ and Ag+). The linear ranges for Fe3+ and Ag+ were 8 × 10−6 to 1 × 10−4 mol L−1 and 5 × 10−6 to 1 × 10−4 mol L−1 respectively, with corresponding detection limits of 8 × 10−7 mol L−1 and 5 × 10−7 mol L−1 respectively.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
BMC PLANT BIOLOGY
·
2017
·Vol. 17
·期 1
·1-16
·
IF 3.964
Huang Yutao,Lin Cheng,He Fei,Li Zhan,Guan Yajing,Hu Qijuan,Hu Jin
Background The low seed vigor and poor field emergence are main factors that restricting the extension of sweet corn in China. Spermidine (Spd) plays an important role in plant growth and development, but little is known about the effect of Spd on sweet corn seed germination. Therefore the effect of exogenous Spd on seed germination and physiological and biochemical changes during seed imbibition of Xiantian No.5 were investigated in this study.Results Spd soaking treatment not only improved seed germination percentage but also significantly enhanced seed vigor which was indicated by higher germination index, vigor index, shoot heights and dry weights of shoot and root compared with the control; while exogenous CHA, the biosynthesis inhibitor of Spd, significantly inhibited seed germination and declined seed vigor. Spd application significantly increased endogenous Spd, gibberellins and ethylene contents and simultaneously reduced ABA concentration in embryos during seed imbibition. In addition, the effects of exogenous Spd on H2O2 and MDA productions were also analyzed. Enhanced H2O2 concentration was observed in Spd-treated seed embryo, while no significant difference of MDA level in seed embryo was observed between Spd treatment and control. However, the lower H2O2 and significantly higher MDA contents than control were detected in CHA-treated seed embryos.Conclusion sThe results suggested that Spd contributing to fast seed germination and high seed vigor of sweet corn might be closely related with the metabolism of hormones including gibberellins, ABA and ethylene, and with the increase of H2O2 in the radical produced partly from Spd oxidation. In addition, Spd might play an important role in cell membrane integrity maintaining.
研究领域:
植物生理学
·
农业科学
✓ 已验证
DOI
PubMed
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2020
·Vol. 37
·期 4
·597-603
·
IF 2.69
Chen Shuai,Zhou Wei,Liu Mingjun,Zhao Guangbo,Cao Qingxi,Zhao Bojun,Kou Kaikai,Gao Jihui
Oxidation of coal under mild conditions is effective not only to understand the macromolecular network structure of coal but also to produce useful chemicals, allowing more efficient application of coal resources. In this work, the mild oxidation of Zhundong subbituminous coal (ZS) by Fe 2+ /H 2 O 2 system was carried out under various conditions, including [Fe 2+ ]/[H 2 O 2 ] molar ratio, temperature, H 2 O 2 concentration and oxidation time. The liquid oxidation products were analyzed using gas chromatography/mass spectrometry (GC/MS), and the chemical structure changes were studied using Fourier transform infrared spectroscopy (FTIR). The results suggest that the oxidation efficiency of ZS with H 2 O 2 is enhanced with the aid of Fe 2+ . The optimum conditions were determined to be [Fe 2+ ]/[H 2 O 2 ] molar ratio of 0.00453, H 2 O 2 concentration of 3mol/L, 60 oC and 4 h according to the oxidation conversion rate. In total, 25 compounds were identified, which could be categorized as six group components. Most of them are valuedadded chemicals, and the content of benzene carboxylic acids is the highest among them, making up 29.99% of all group components in total relative content (TRC). -CH 2 - should be primary bridge connecting the aromatic rings, and alkylene chains linking three aromatic rings are abundant in ZS.
研究领域:
煤炭化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2025
·Vol. 17
·期 7
·994
·
IF 4.9
Yuhuan Qiu,Zhongtao Zhao,Feng Hu,Mengyi Liu,Xiaowen Shi
This study develops an efficient method for chitin extraction from fly larvae using a synergistic sodium dodecyl sulfate (SDS)-hydrogen peroxide (H2O2) system. Through a three-factor orthogonal experimental design, the optimal conditions were determined as 7% H2O2, 80 °C, and 15% SDS, achieving 97.93% deproteinization and 95.66% lipid removal efficiencies. Comparative analyses revealed that the SDS-H2O2system outperformed traditional alkaline and deep eutectic solvent treatments in both purification performance and structural preservation. Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) confirmed the high purity and crystallinity of the extracted chitin. Chitin prepared by this method demonstrated good Pb2+adsorption (99.91%), highlighting its potential for targeted heavy metal remediation.
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
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Zhangxing He,Yingqiao Jiang,Wei Meng,Fengyun Jiang,Huizhu Zhou,Yuehua Li,Jing Zhu,Ling Wang,Lei Dai
In order to improve the electrochemical performance of the positive graphite felt electrode in vanadium flow redox battery, a novel method is developed to effectively modify the graphite felt by combination of etching of HF and oxidation of H 2 O 2 . After the etching of HF for the graphite felt at ambient temperature, abundant oxygen-containing functional groups were further introduced on the surface of graphite felt by hydrothermal treatment using H 2 O 2 as oxidant. Benefiting from the surface etching and introduction of functional groups, mass transfer and electrode process can be improved significantly on the surface of graphite felt. VO 2+ /VO 2 + redox reaction on the graphite felt modified by HF and H 2 O 2 jointly (denote: GF-HF/H 2 O 2 ) exhibits superior electrochemical kinetics in comparison with the graphite felt modified by single HF or H 2 O 2 treatment. The cell using GF-HF/H 2 O 2 as the positive electrode was assembled and its electrochemical properties were evaluated. The increase of energy efficiency of 4.1% for GF-HF/H 2 O 2 at a current density of 50 mA cm −2 was obtained compared with the pristine graphite felt. The cell using GF-HF/H 2 O 2 also demonstrated higher discharge capacity. Our study revealed that HF/H 2 O 2 treatment is an efficient method to enhance the electrochemical performance of graphite felt, further improving the comprehensive energy storage performance of the vanadium flow redox battery.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Chen-Yan Hu,Yuan-Zhang Hou,Yi-Li Lin,Yan-Guo Deng,Shuang-Jing Hua,Yi-Fan Du,Chiu-Wen Chen,Chung-Hsin Wu
The degradation rates and kinetics of one commonly used iodinated contrast medium, iohexol, were investigated and compared during ultraviolet (UV) photolysis, UV/H 2 O 2 and UV/ S 2 O 8 2 − advanced oxidation processes (AOPs). Results indicate that the iohexol degradation rate increased in the order of UV/H 2 O 2 < UV irradiation < UV/ S 2 O 8 2 − and followed pseudo-first-order kinetics. Increasing persulfate concentration significantly increased iohexol degradation rate, whereas increasing H 2 O 2 concentration caused reverse effect. Radical scavenging test results show that UV photolysis, OH and radicals all contributed to iohexol degradation during UV/ S 2 O 8 2 − , but OH was the main contributor during UV/H 2 O 2 and was consumed by excess H 2 O 2 . The kinetic models of iohexol degradation by both AOPs were developed, and the reaction rate constants with OH and were calculated as 5.73 (±0.02) × 10 8 and 3.91 (±0.01) × 10 10 M −1 s −1 , respectively. Iohexol degradation rate remained stable at pH 5–9 during UV irradiation and UV/H 2 O 2 , but gradually decreased at pH 5–7 and remained stable at pH 7–9 during UV/ S 2 O 8 2 − . The presence of anions displayed inhibitory effects on iohexol degradation during UV/ S 2 O 8 2 − in the order of Cl − > HCO 3 − ≫ S O 4 2 − . UV/ S 2 O 8 2 − AOP exhibited high degradation efficiency and stability on the basis of UV irradiation, which can be applied as a promising degradation method for iohexol. UV/ S 2 O 8 2 − AOP can effectively mineralize iohexol to CO 2 but promoted the generation of toxic iodoform (CHI 3 ), and the subsequent chlorination had the potential to reduce the content of disinfection by-products; therefore, further evaluation of possible environmental hazards is warranted.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DEVELOPMENTAL CELL
·
2022
·
IF 13.417
Wen-Cheng Liu,Ru-Feng Song,Yi-Min Qiu,Si-Qiu Zheng,Ting-Ting Li,Yan Wu,Chun-Peng Song,Ying-Tang Lu,Hong-Mei Yuan
Summary H 2 O 2 affects the expression of genes that are involved in plant responses to diverse environmental stresses; however, the underlying mechanisms remain elusive. Here, we demonstrate that H 2 O 2 enhances plant freezing tolerance through its effect on a protein product of low expression of osmotically responsive genes2 ( LOS2 ). LOS2 is translated into a major product, cytosolic enolase2 (ENO2), and sometimes an alternative product, the transcription repressor c-Myc-binding protein (MBP-1). ENO2, but not MBP-1, promotes cold tolerance by binding the promoter of C-repeat/DRE binding factor1 ( CBF1 ), a central transcription factor in plant cold signaling, thus activating its expression. Overexpression of CBF1 restores freezing sensitivity of a LOS2 loss-of-function mutant. Furthermore, cold-induced H 2 O 2 increases nuclear import and transcriptional binding activity of ENO2 by sulfenylating cysteine 408 and thereby promotes its oligomerization . Collectively, our results illustrate how H 2 O 2 activates plant cold responses by sulfenylating ENO2 and promoting its oligomerization, leading to enhanced nuclear translocation and transcriptional activation of CBF1 .
研究领域:
植物生理学
·
分子生物学
·
应激反应
✓ 已验证
DOI
PubMed
高影响因子
Analytical Methods
·
2025
·
IF 2.6
Wei Liu,Honghuang Li,Deming Li,Xiaoting Liu,Lei Liu,Zhiyong Zhu,Haoyu Hao,Qiongyao Zeng,Yanhua Sun
In this work, MWCNTs/Ti3C2 nanocomposites have been synthesized by a convenient method and characterized in terms of structure and properties by SEM, FT-IR, XPS and electrochemical methods. The electrochemical sensor developed by MWCNTs/Ti3C2 nanocomposites has good electrochemical properties. The sensor has good electrocatalytic performance for H2O2 and was used to detect the concentration of H2O2. The sublinear range of detection was 0.05-1080 μM and the detection limit was 0.017 μM (S/N=3). The sensor has strong anti-interference performance, stability and reproducibility, and has shown good performance in real sample detection.
研究领域:
材料科学
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2023
·Vol. 16
·期 3
·1261
·
IF 3.4
Qian Wang,Yuzhe Wang,Guiyong Xiao,Xinde Zhu
In this work, the facile fabrication of Co3O4particles/reduced graphene oxide (Co3O4/rGO) composites on Indium tin oxide (ITO) slide was achieved by an electrophoretic deposition and annealing process. The deposition time and ratio of the precursors were optimized. Structural characterization and chemical composition investigation indicated successful loading of Co3O4particles on graphene sheets. When applied as a non-enzymatic H2O2sensor, Co3O4/rGO showed significant electrocatalytic activity, with a wide linear range (0.1–19.5 mM) and high sensitivity (0.2247 mA mM−1cm−2). The good anti-interference ability, reproducibility, and long-term stability of the constructed sensor were also presented. The application of Co3O4/rGO in real sample analysis was evaluated in human urine sample with satisfactory results, indicating the feasibility of the sensor in physiological and medical applications.
研究领域:
材料科学
·
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Minghong Fan,Zhiyu Gong,Jiayu Zheng,Lu Zhou,Beibei Qi,Tianzuo Liu,Zhengfei Yang
Unique nanostructures of bimetallic materials derived from zeolitic imidazolate frameworks (ZIFs) are promising candidates for electrochemical sensor applications. In this study, different bimetallic bar-shaped ZIFs (B-ZIFs) were synthesized by replacing some cobalt ions with different metals ions (Ni 2+ , Ce 2+ , Cu 2+ , Mn 2+ , or Fe 3+ ). Then their derivatives were prepared via carbonization, respectively. Upon conducting thorough material characterizations and assessment of the electrochemical properties, the most suitable candidate for electrode modification was identified as bar-shaped Co/Cu-based carbon materials (B-Co/Cu/Cs). This choice facilitated the construction of an innovative electrochemical sensor tailored for the determination of H 2 O 2 . The furnished B-Co/Cu/Cs-based sensor showed good linearity for H 2 O 2 analysis within concentrations ranged from 0.5-4000 μM and 4000–11000 μM, with a detection limit of 0.44 μM. All these results suggested that the prepared material would be a competitive candidate for the non-enzymatic H 2 O 2 sensing.
研究领域:
材料科学
·
分析化学
·
电化学
✓ 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）