JOURNAL OF FLUORESCENCE
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2025
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IF 3.1
Han Bo-Ming,Zhang Hao-Rui,Gao Wen-Jie,He Xi-Wen,Li Wen-You,Zhang Yu-Kui
In this work, a dual-emission material based on lanthanide metals was synthesized and used as a ratio fluorescence sensor to respond to Hg 2+ and H 2 O 2 , respectively. Tb-BDC-NH 2 as a bimetal MOFs had double ligands and exhibited double fluorescence emission peaks at 550 nm and 450 nm. The two emission peaks of Tb-BDC-NH 2 can be quenched by Hg 2+ and H 2 O 2 respectively, forming a built-in calibration signal for ratio fluorescence detection. Based on the different detection conditions of the Hg 2+ and H 2 O 2 , the simultaneous detection of the two detection substances can be achieved with simple operation. This detection system had good stability and anti-interference ability. Under optimal conditions, the detection limit for Hg 2+ detection was 0.2 µM. Meanwhile, for the detection of H 2 O 2 , the detection limit was 11 µM and large linear ranges were obtained. Through actual sample testing, it had been proven that the ratio fluorescence sensor based on Tb-BDC-NH 2 had good application prospects. And the work also provided a new idea for double substances detection.
研究领域:
分析化学
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环境科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2019
·
IF 3.261
Binyang Zhang,Mengdie Chen,Dongya Li,Haiming Xu,Dongsheng Xia
FeOCl was prepared by a partial thermal decomposition method to effectively catalyze hydrogen peroxide under the visible light for the degradation of toxic organic wastewater. The combination of DRS and VB-XPS indicated that FeOCl is a narrow band gap catalyst with visible light absorption capacity (Eg =1.63 eV). The degradation rate constant of RhB in FeOCl/H 2 O 2 /Vis system is about 13.4 times that of FeOCl/H 2 O 2 system. Compared to other heterogeneous Photo-Fenton systems, the oxidant utilization efficiency in FeOCl/H 2 O 2 /Vis system is higher. In addition, FeOCl has stable Photo-Fenton activity in a wide pH range (3.0–9.0). The content of Fe(II) increased after 5 cycles reaction through the ESR and XPS characterization, which proves that the electron transfer of Fe(III)/Fe(II) was improved during the reaction. After quantitative analysis of the ·OH generated in the reaction, the formation rate of ·OH in FeOCl/H 2 O 2 /Vis system is increased about 30% compared with FeOCl/H 2 O 2 /dark system. These results indicate that visible light excites FeOCl to generate produces photogenerated electron-hole pairs, accelerating the cycle of Fe(III)/Fe(II), promoting the production rate of ·OH, and enhancing the catalytic efficiency of FeOCl.
研究领域:
环境科学
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催化化学
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2014
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IF 6.451
Jianxiu Zhang,Liping Tu,Shuang Zhao,Guohua Liu,Yangyun Wang,Yong Wang,Zhao Yue
In this work, low-toxicity fluorescent gold nanoclusters (AuNCs) based photoelectrochemical sensors were developed for H 2 O 2 and glucose detection. Herein, the processes used to fabricate the sensors and the photoelectrochemical performances of the sensors under different conditions were presented. Based on the energy band levels of the AuNCs and electron tunneling processes, a detailed photoelectrochemical sensing model was given. The designed sensors were then used for H 2 O 2 and glucose detection without any extra modification of the AuNCs or complex enzyme immobilization . The results demonstrate that the AuNCs allow for H 2 O 2 sensing based on their capacity for both fluorescence and catalysis. Indeed, it was observed that H 2 O 2 was catalyzed by the AuNCs and reduced by photoinduced electrons derived from excited AuNCs. Furthermore, an enhancement in photocurrent amplitude followed the increase in the concentrations of H 2 O 2 and glucose. The effects of the types of ligands surrounding the AuNCs and the applied potential on the output photocurrent were well studied to optimize the measurement conditions. The sensitivity and LOD of MUA-AuNCs at −500 mV were 4.33 nA/mM and 35 μM, respectively. All experimental results indicated that AuNCs could not only serve as a promising photoelectrical material for building the photoelectrochemical biosensors but as catalysts for H 2 O 2 sensing.
研究领域:
生物医学工程
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分析化学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
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IF 13.273
Zhenzhen Wang,Yajie Zhao,Yunjie Zhou,Xiao Wang,Hui Huang,Yang Liu,Mingwang Shao,Zhenhui Kang
Achieving multi-functions integrating reaction, separation and concentration into one-step catalysis process is a great challenge. Photocatalytic H 2 O 2 generation is the cleanest and cheapest way for its production. Herein, an all-in-one photocatalytic device for H 2 O 2 generation was designed by catalysis layer with ZIF-8/C 3 N 4 composite and carbon dots-based evaporation layer (CDE). With this device, H 2 O 2 solution with high concentration is obtained, and no need for extra separation and concentration processes. Under 2 sun illumination (3 h), H 2 O 2 evolution reaches 17.13 μmol and H 2 O 2 solution concentration gets to 10.15 mmol L −1 . Mole fraction of H 2 O 2 solution obtained by all-in-one device is 1.86 times more concentrated than that of not concentrated H 2 O 2 solution. Besides, multiples devices can work concurrently to realize large-scale production and gain large amounts of H 2 O 2 solution with high concentration. Moreover, all-in-one devices can be reused at least ten cycles. The relation between the structure and performance of the photocatalysis device is further studied by COMSOL Multiphysics software and mathematical analysis. All-in-one photocatalytic device promotes H 2 O 2 photoproduction closer to the practical application due to realizing continuous production of amounts of aqueous solution of H 2 O 2 with high concentration in one-step.
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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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2022
·Vol. 29
·期 48
·72586-72597
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IF 5.19
Huang Xiaori,Chen Yiqun,Sun Dedong,Ma Hongchao,Wang Guowen,Dong Xiaoli
In this research, the treatment of methylene blue (MB) dye wastewater by a novel system that combines H 2 O 2 with an aluminum-carbon micro-electrolysis (ACE) was explored. The effects of the H 2 O 2 amount, initial pH, aluminum to carbon ratio, total aluminum-carbon mass, dye concentration, and reaction temperature on degradation of MB were investigated. The findings revealed that under the following conditions: H 2 O 2 34.0 mg/L, initial pH of 3.0, aluminum-to-carbon ratio of 2:1, total aluminum-carbon mass of 2.0 g/L, MB concentration of 20 mg/L, and 20 °C, the degradation rate of MB could reach 99.3% after 180 min, which is 18.4% more compared with ACE at the same conditions without H 2 O 2 . Through the quenching experiments, it was proved that the efficient free radicals produced during degradation are •OH and •O 2 - . Finally, a possible mechanism of H 2 O 2 enhanced aluminum carbon micro-electrolysis (HP-ACE) for MB degradation was discussed.
研究领域:
环境科学
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化学工程
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水处理
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DOI
PubMed
高影响因子
Journal of Cleaner Production
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2024
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IF 9.7
Jiahui Zhang,Wenliang Zhang,Yue Wang,Shaoyi Jiang,Yan Wang,Zhezheng Ding,Xiaomin Liu
2,4-dichlorophenoxyacetic (2,4-D) acid and 4-chlorophenoxyacetic acid (4-CPA), as widely utilized organochlorine pesticides , are normally detected in wastewater and atmosphere. Their harmfulness to the ecosystem cannot be ignored. UV/H 2 O 2 is one of the most conventional advanced oxidation processes, which has remarkable advantages for the removal of refractory organic pollutants in wastewater. However, the reaction mechanisms and pathways of pollutants with reactive radicals are still unclear. In this study, the degradation efficacy and mechanisms during the photodegradation of 2,4-D and 4-CPA in UV/H 2 O 2 processes were investigated by experiments and density functional theory calculations. The results showed that 2,4-D was more likely to be degraded by UV/H 2 O 2 treatment than UV photolysis alone. In contrast, 4-CPA can be degraded effectively and rapidly under UV irradiation alone. By LC-MS analysis, the degradation products of 2,4-D and 4-CPA in the UV/H 2 O 2 processes were identified and they were produced by hydroxylation and photolysis. Therefore, we speculated a competition mechanism presented between direct photolysis and indirect photolysis in the UV/H 2 O 2 degradation of 2,4-D and 4-CPA. The OH-initiated reaction mechanisms of 2,4-D and 4-CPA in aqueous environments were investigated using quantum chemical methods SMD/M06–2X/6–311++G (3df, 2p)//SMD/M06–2X/6-311 + G (d,p). The pH dependence of the reaction mechanisms and rate constants in their degradation process induced by ·OH was also investigated. The calculation results showed that the ionic forms (2,4-D - and 4-CPA - ) were more prone to react with ·OH in comparison to the corresponding molecular forms (2,4-D and 4-CPA). The total rate constants of 2,4-D and 4-CPA with OH increased with the pH from 1 to 10, and decreased with continued pH increase. The toxicities of 2,4-D, 4-CPA and their products were assessed by the QSAR-based toxicity evaluation software. The results showed that several products were more toxic than their parent compounds, such as 2,4-dichlorophenol, 3,5-dichlorocatechol, 4-chlorophenol and hydroquinone . This work can contribute to clarifying the environmental risks of 2,4-D and 4-CPA and offer a complete understanding for the photodegradation behavior of 2,4-D and 4-CPA in aqueous ecosystems.
研究领域:
环境科学
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化学
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DOI
高影响因子
ORGANIC PROCESS RESEARCH & DEVELOPMENT
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2024
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IF 3.1
Shichun Weng,Juan Zhou,Yingtao Tian,Xigui Jiang,Rong Chen,Jinyao Hu,Zichao Guo,Liping Chen,Wanghua Chen
In this article, a mixture of sulfuric acid and 50% hydrogen peroxide solution was used to produce Caro’s acid, which serves as an oxidant frequently encountered in the fine chemical industry. The chemical compatibility between 50% H2O2/H2SO4 and organic solvents is an important safety issue. The compatibility of 50% H2O2/H2SO4 and several organic solvents, including ethanol, acetonitrile, ethyl acetate, DMF, dichloroethane, DMSO, ether, and toluene, was studied by reaction calorimetry and thermal analysis techniques. It was found that the first five solvents presented good compatibility with 50% H2O2/H2SO4. DSC tests indicated that these five solvents almost did not react with 50% H2O2/H2SO4 before the onset decomposition temperature of 50% H2O2/H2SO4 (∼93.3 °C). RADEX tests showed that the reactions of 50% H2O2/H2SO4 with these solvents released heats from 800 to 1100 J g–1, and the pressure effect was obvious for these mixtures. In contrast, the last three solvents, namely, DMSO, ether, and toluene, were incompatible with 50% H2O2/H2SO4, exhibiting a significant exothermic signal at lower temperatures. Most interestingly, the mixture of DMSO and 50% H2O2/H2SO4 presented a thermal runaway phenomenon below 40 °C. The causes of this thermal runaway incident were confirmed to be the oxidation of DMSO by Caro’s acid. Reaction calorimetry tests also indicated that the oxidation rate of DMSO was fast even at 40 °C, and the adiabatic temperature rise for the oxidation of DMSO was higher than 400 K.
研究领域:
化学工程
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安全科学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
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IF 7.2
Ya-Nan Wang,Yaxin Guo,Jinsong Peng,Jianwei Zhao,Lei Yang,Haiyan Song,Chunxia Chen
s Photocatalytic H 2 O 2 production represents a sustainable and promising avenue for energy and environment. Photoproduction of H 2 O 2 in seawater is potentially an alternative to meet the needs of H 2 O 2 utilization in ocean, while with challenges of competitive ions influence and unsolved photocatalytic mechanism. Herein, we constructed a S-scheme heterojunction with the lamellated WO 3 coated CdS semiconductors for photoproduction of H 2 O 2 in actual seawater. Fragmented WO 3 uniformly spread on surface of dispersed CdS spheres by two steps including calcination and ultrasound. Photocatalyst achieved considerable 1.00 mmol·g cat −1 ·h −1 of H 2 O 2 productivity in seawater without electron-proton donors and pure O 2 , 9.3 % of apparent quantum yield (AQY), as well as good reusability. A co-catalysis concept was proposed to explore specific role of ions in seawater on H 2 O 2 photoproduction. S-scheme heterojunction contributed to migration of electrons and holes on interface between WO 3 and CdS, and further promoted separation of photocarriers, and further opened another channel for H 2 O 2 generation. Accumulated electrons in conduction band (CB) of CdS involved in the main route of two-electron reduction of O 2 for H 2 O 2 production, also promoted generation of •O 2 - for opening the auxiliary route. WO 3 /CdS heterojunction provided fundamentals and opportunities for H 2 O 2 production and applications in abundant seawater as a sustainable way.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Hanlin Wang,Haibo Liu,Xuehua Zou,Fuwei Sun,Luyao Wang,Jingchao Hu,Dong Chen,Meng Liu,Jianfei Shen,Tianhu Chen
In this work, the effect of Co substitution in the Fe 1-x S (CSP) on the activation of H 2 O 2 to degrade tetracycline (TC) is investigated. A series of CSP samples with different Co content are synthesized via a high-temperature sulfidation method and characterized by XRD , XPS , SEM, and electrochemical analysis . The result showed that low Co content (≤1%) promotes the catalytic activity of Fe 1-x S, while excessive Co (1%﹤x ≤ 3%) inhibits its catalytic activity. The investigation of Behnajady-Modirshahla-Ghanbery kinetic model (BMG) showed that the maximum initial degradation rate of TC over 1.0% CSP/H 2 O 2 was 1.6 times than that of in CSP/H 2 O 2 system. The Box-Behnken with Response Surface Methodology was employed to verify optimum condition for TC degradation. The quenching experiments and ESR determined that ·OH, ·O 2 − and 1 O 2 were involved in TC degradation with the treatment of 1.0% CSP/H 2 O 2 system. Electrochemical analysis, ·OH quantification, and metal ion concentrations measure reveal that Co substitution accelerates electron transfer efficiency and Fe 2+ regeneration. Furthermore, nine intermediates are identified and the possible degradation pathway of TC is proposed. The unique effect of Co provides novel insight and efficient strategies for improving the reactivity of iron sulfide.
研究领域:
环境科学
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催化化学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 48
·期 5
·1998-2007
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IF 3.3
Li Feng,Hanping Fu,Tianxiang Zhang,Qing Zhang,Shufen Ren,Jiayun Cheng,Qingshuang Liang,Xiufeng Xiao
The surface properties of a photocatalyst play a pivotal role in maximizing the H2O2 generation efficiency of the photocatalyst system, especially in spurring the surface catalytic reactions and inhibiting the decomposition of H2O2. Herein, a series of Bi/BiOBr-X (X = 1, 2, and 3) photocatalysts co-modified with metal Bi and oxygen vacancies were obtained by a one-step solvothermal method using mannitol as a solvent and a reducing agent. Both Bi modification and the introduction of OVs have important influence on extending the light absorption range, enhancing charge carrier separation and suppressing the recombination of charge carriers as confirmed by UV-vis DRS, EIS, and PL characterization. Besides, the introduction of OVs can lead to an upward shift of CB minimum, which results in a stronger reduction ability of the photogenerated electrons, facilitating the reaction of the photogenerated electrons with molecular oxygen to produce superoxide ions. Meanwhile, the deposition of Bi nanoparticles on the surface of BiOBr nanosheets can significantly inhibit the decomposition of H2O2. Benefiting from the synergetic effect of Bi modification and the introduction of OVs, the as-prepared photocatalysts showed enhanced H2O2 production activity as high as 100.9 mM h−1 g−1. The present work not only marks a significant advancement in photocatalytic H2O2 production technology, but also provides a feasible idea and strategy for photocatalytic production of clean and renewable energy.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Fanyu Meng,Lina Guo,Haocheng Zou,Boming Zhu,Fayang Zhou,Yiqing Zeng,Jiayou Han,Jun Yang,Shule Zhang,Qin Zhong
To achieve high NO oxidation efficiency, excessive O 3 must be used, which would lead to the high cost and escape of ozone. Herein, we adopted low cost and environmental-friendly TiO 2 as the catalyst of low concentration O 3 and H 2 O 2 system for high-efficiency NO x oxidation. The Ti sites on TiO 2 were the deprotonation sites of H 2 O 2 and H 2 O into Ti-OOH and Ti-OH species, respectively. We found that the surface of rutile phase TiO 2 had a low concentration Ti-OOH component but a large amount of Ti-OH after contacting with H 2 O 2 solution, thus lots of ·OH and a few O 2 − radicals formed with introducing O 3 molecules. H 2 O 2 solution induced the formation of a large amount of Ti-OOH and Ti-OH species on the anatase phase TiO 2 surface, thus lots of O 2 − generated in the O 3 /H 2 O 2 system. O 2 − and O H radicals could efficiently oxidize NO, in which O 2 − radicals could oxidize NO to NO 3 − in one step with high selectively. Therefore, anatase TiO 2 had better performance in NO x oxidation than rutile phase TiO 2 . The effect of temperature and SO 2 concentration on NO oxidation was also investigated, the results showed that TiO 2 -A/O 3 /H 2 O 2 system promoted NO oxidation at a low temperature and a low concentration of SO 2 .
研究领域:
环境科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Chengcheng Qi,Yuhua Luo,Yongping Dong
The study of single atoms in the field of electrochemical sensing is at the early stage. How to boost the catalytic performance of single atoms is still a big challenge. Herein, we prepare Fe-Se dual single-atom sites on N-doped ultrathin carbon carrier (Fe 1 Se 1 /NC) for realizing highly sensitive nonenzymatic detection of H 2 O 2 . Fe 1 Se 1 /NC was synthesized through the pyrolysis strategy, and then was characterized by transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS) mapping, high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), X-ray diffraction (XRD), X-ray photoelectron spectrometer (XPS), and electrochemical techniques, respectively. The results displayed that Fe and Se both existed in an atomically dispersed status. Compared to the single-atom Se or Fe catalyst (Se 1 /NC or Fe 1 /NC), the Fe 1 Se 1 /NC significantly boosted the electrocatalytic activity for H 2 O 2 reduction. The Fe 1 Se 1 /NC modified electrode could be used to detect H 2 O 2 in a wide linear range of 0.02 mM to 13 mM with a high sensitivity of 1508.6 µA·mM −1 ·cm −2 and a low detection limit of 11.5 µM. Moreover, the sensor was successfully employed for detecting H 2 O 2 in disinfectant and urine samples. This work provides a novel design of dual-atom catalysts for excellent electrochemical sensing applications.
研究领域:
电化学
·
催化
·
材料科学
·
分析化学
✓ 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）