CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Binrong Li,Huijie Wang,Yiying Lan,Yanhua Cui,Yunlei Zhang,Yonghai Feng,Jianming Pan,Minjia Meng,Chundu Wu
Fe species/biochar fiber composite (FCF) has become one of promising materials for wastewater treatment via heterogeneous photo-Fenton reaction. However, the powdered form always suffers from inefficient recovery and inherent iron loss, limiting their practical application. Herein, we provide an alternative polydopamine (pDA)-modified PVDF bead as excellent photo-Fenton support for immobilizing FCF by phase inversion, which not only limits the loss of iron ions, but also promotes the H 2 O 2 decomposition. Moreover, these beads can float on the wastewater due to their inner structure, favoring the harvest of light. Thanks to these unique characteristics, these beads displayed almost 100% of decolorization in self-designed flowing dyes wastewater systems. Particularly, the self-floating beads structure makes catalysts be easily recovered and maintains long-term high activity, which significantly eliminates the inherent challenge of powdered catalyst (e.g. FCF) based degradation process. This work provides an “easily applicable platform” for large-scale applications of powdered photo-Fenton catalyst in wastewater treatment.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
ELECTROANALYSIS
·
2021
·Vol. 34
·期 2
·369-374
·
IF 3.223
Xiao Liu,Mei-Hao Xiang,Xinyue Zhang,Qin Li,Xiaoya Liu,Wenjing Zhang,Xia Qin,Fengli Qu
In this work, we reported the development of a nickel metal-organic framework nanosheet array on Ti-mesh (Ni-MOF/TM) as an enzyme-free electrochemical sensing platform for H 2 O 2 determination. The as-obtained sensor exhibited outstanding detection properties of H 2 O 2 , which might be gifted from the large specific surface area, abundant active sites of Ni-MOF nanoarrays. The sensor displayed a good linear range (0.8 μM–4.6×10 3 μM), a detection limit as low as 0.26 μM, a high sensitivity (307.5 μA mM −1 cm −2 ), and a rapid response. Moreover, this enzyme-free sensor is promising for point-of-care (POC) testing of H 2 O 2 in human serum attribute to the excellent performance of Ni-MOF and the simple preparation process of the sensor.
研究领域:
生物医学工程
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分析化学
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高影响因子
Journal of Analysis and Testing
·
2018
·Vol. 2
·期 1
·69-76
·
IF 0
Zhen Wen-Yao,Bai Jing,Jia Xiao-Dan,Wu Lie,Jiang Xiu-E
The local tumor hypoxia has become one of the main obstacles for photodynamic therapy (PDT).To break through this barrier, the fabrication of O 2 -evolving nanoplatform has been more significant. Herein, the uniform methylene blue (MB)–bovine serum albumin (BSA)–Fe(III) nanoparticles (MB–BSA–Fe(III) NPs) were successfully synthesized by biomineralization approach. MB–BSA–Fe(III) NPs show high loading capacity of MB, and Fe(ΙΙΙ) has excellent catalytic performance towards abundant H 2 O 2 in cancer cells to generate O 2 , overcoming tumor hypoxia. All these combination effects remarkably increase the therapeutic efficiency of PDT, resulting in almost complete destruction of cancer cells. Most importantly, MB–BSA–Fe(III) NPs exhibit T 2- magnetic resonance imaging, which have the potential for precise visualization of the tumor location. Our results demonstrate that MB–BSA–Fe(III) is a novel H 2 O 2 -responsive and O 2 -evolving nanoplatform and it has great potential for clinical applications such as cancer diagnosis, treatment or drug delivery.
研究领域:
纳米医学
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肿瘤学
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生物材料科学
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DOI
CHEMOSPHERE
·
2017
·
IF 4.208
Zilong Zhao,Wenyi Dong,Hongjie Wang,Guanhan Chen,Wei Wang,Zekun Liu,Yaguang Gao,Beili Zhou
Elimination of hypophosphite (HP) was studied as an example of nickel plating effluents treatment by O 3 /H 2 O 2 and sequential Fe(II) catalytic oxidation process. Performance assessment performed with artificial HP solution by varying initial pH and employing various oxidation processes clearly showed that the O 3 /H 2 O 2 ─Fe(II) two-step oxidation process possessed the highest removal efficiency when operating under the same conditions. The effects of O 3 dosing, H 2 O 2 concentration, Fe(II) addition and Fe(II) feeding time on the removal efficiency of HP were further evaluated in terms of apparent kinetic rate constant. Under improved conditions (initial HP concentration of 50 mg L −1 , 75 mg L −1 O 3 , 1 mL L −1 H 2 O 2 , 150 mg L −1 Fe(II) and pH 7.0), standard discharge (<0.5 mg L −1 in China) could be achieved, and the Fe(II) feeding time was found to be the limiting factor for the evolution of apparent kinetic rate constant in the second stage. Characterization studies showed that neutralization process after oxidation treatment favored the improvement of phosphorus removal due to the formation of more metal hydroxides. Moreover, as a comparison with lab-scale Fenton approach, the O 3 /H 2 O 2 ─Fe(II) oxidation process had more competitive advantages with respect to applicable pH range, removal efficiency, sludge production as well as economic costs.
研究领域:
环境工程
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废水处理
·
化学工程
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DOI
PubMed
高影响因子
Science Bulletin
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2017
·
IF 4.092
Jie Xu,Zhenye Chen,Hongwen Zhang,Guibin Lin,Huaxiang Lin,Xuxu Wang,Jinlin Long
For a long time, there has been global concern over the environment and energy problems. Recently, the problems, which have brought about serious effect on the global living condition, have been in the “spotlight” and given impetus to the universal’s efforts to head for the same direction: stem the worst warming and strive for the renewable energy source . Hydrogen peroxide (H 2 O 2 ) is undoubtedly a good choice, which holds the promise as a clean, efficient, safe and transferrable energy carrier. Octahedral coordination polymer , Cd 3 (C 3 N 3 S 3 ) 2 , was found to be a robust photocatalyst for H 2 O 2 generation under visible light irradiation . To further improve the H 2 O 2 generation efficiency, adhering the octahedron to reduced graphene (rGO) was applied as the strategy herein. The study shows that by adhering Cd 3 (C 3 N 3 S 3 ) 2 to rGO , the formation of H 2 O 2 is 2.5-fold enhanced and its deformation is concurrently suppressed. This work not only demonstrates the effectiveness of adhering Cd 3 (C 3 N 3 S 3 ) 2 polymer to rGO for the improvement of the polymer’s photocatalytic performance, but also proposes a general way for the fabrication of graphene/coordination compound hybrids for maximizing their synergy.
研究领域:
材料科学
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环境科学
·
能源科学
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DOI
PubMed
高影响因子
Emerging Contaminants
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2016
·
IF 0
Bo Yang,Yanni Han,Yunpan Deng,Yingying Li,Qiongfang Zhuo,Jinhua Wu
Electrocoagulation (EC) technique was used to investigate the removal performance of aqueous perfluorooctanoic acid (PFOA) with relatively high concentration as simulating the wastewater from organic fluorine industry. A comparison was done with the similar amount of coagulant between EC and chemical coagulation process. PFOA removal obtained was higher with EC process, especially for Fe anode. Several factors were studied to optimize the EC process. At the optimal operating parameters including 37.5 mA/cm 2 of current density, initial pH 3.77, and 180 rpm of mixing speed, 93% of PFOA could be removed with 100 mg/L of initial concentration after 90-min electrolysis. Furthermore, the remove efficiency could be obviously improved by H 2 O 2 intermittent addition, which removed more than 99% of PFOA within 40-min EC. It could be attributed to that H 2 O 2 facilitated the oxidative transformation from ferrous to ferric ion. In addition, the adsorptive removal of aqueous PFOA on Fe flocs during EC was also verified by fourier transform infrared spectra.
研究领域:
环境科学
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化学工程
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DOI
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2016
·Vol. 23
·期 17
·17822-17830
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IF 2.76
Zhang Qian,Xia Yu-Feng,Hong Jun-Ming
As widely used disinfectants, the pollution caused by benzalkonium chloride (BAC) has attracted a lot of attention in recent years. Since it is not suitable for biodegradation, BAC was degraded firstly by Fenton advanced oxidation technologies (AOTs) in this research to enhance the biodegradability of the pollutions. The result revealed that the optimal molar ratio of H 2 O 2 /Fe 2+ for BAC degradation was 10:1, and the COD removal rate was 32 %. To clarify the pathway of degradation, the technique of GC-MS was implemented herein to identify intermediates and the toxicity of those BAC intermediates were also novelty tested through microbial fuel cells (MFC). The findings indicated that ten transformation products including benzyl dimethyl amine and dodecane were formed during the H 2 O 2 /Fe 2+ processes, which means the degradation pathway of BAC was initiated both on the hydrophobic (alkyl chain) and hydrophilic (benzyl and ammonium moiety) region of the surfactant. The toxicity of BAC before and after treated by Fenton process was monitored through MFC system. The electricity generation was improved 337 % after BAC was treated by H 2 O 2 /Fe 2+ oxidation processes which indicated that the toxicity of those intermediates were much lower than BAC. The mechanism and toxicity research in this paper could provide the in-depth understanding to the pathway of BAC degradation and proved the possibility of AOTs for the pretreatment of a biodegradation process.
研究领域:
环境科学
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毒理学
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DOI
PubMed
高影响因子
ANALYST
·
2018
·Vol. 143
·期 21
·5278-5284
·
IF 3.864
Meng Wang,Xianwen Kan
In this study, an exfoliated graphite paper (EGP) was employed as a supported electrode for prussian blue (PB) and gold nanoparticles (AuNPs) modification to fabricate a novel electrochemical sensor. The scanning electron microscopy image showed the multilayer structure of the sensor with PB and AuNPs uniform coating. Due to the high surface area and good conductivity of the multilayer structure, as well as the conductivity of AuNPs, the prepared sensor exhibited an obvious improvement for sensitive detection of nicotinamide adenine dinucleotide (NADH) with a linear range of 5.0 × 10−7 mol L−1–1.0 × 10−3 mol L−1. Moreover, the modified PB film endowed the sensor with good electrocatalytic activity for hydrogen peroxide (H2O2) sensing. Under the optimal conditions, the linear range and limit of detection for H2O2 sensitive detection were 5.0 × 10−8 mol L−1–1.0 × 10−3 mol L−1 and 4.8 × 10−9 mol L−1, respectively. The sensor can also be used for detection in real samples with satisfactory results. The advantages of low-cost, easy modification, multilayer structure, and good conductivity made the EGP an alternative candidate for supported electrode materials in the preparation and application of various electrochemical sensors.
研究领域:
分析化学
·
生物传感器
·
电化学
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DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2017
·
IF 6.32
Mingrui Song,Junli Wang,Baiyang Chen,Lei Wang
Hydrogen peroxide (H2O2) is ubiquitous in the natural environment, and it is now widely used for pollutant control in water and wastewater treatment processes. However, current analytical methods for H2O2 inevitably require reactions between H2O2 and other reactants to yield signals and are thus likely subjective to the interferences of coexisting colored, oxidative, and reductive compounds. In order to overcome these barriers, we herein for the first time propose to analyze H2O2 by ion chromatography (IC) using an ultraviolet (UV) detector. The proposal is based on two principles: first, that H2O2 can deprotonate to hydroperoxyl ion (HO2–) when eluent pH is higher than the acid-dissociation coefficient of H2O2 (pKa = 11.6); and second, that after separation from other compounds via IC column, H2O2 can be quantified by a UV detector. Under favorable operating conditions, this method has successfully achieved acceptable recoveries (>91%) of H2O2 dosed to ultrapure and natural waters, a calibration curve with R2 > 0.99 for a wide range of H2O2 concentrations from 0.1 to 50 mg/L and a method detection limit of 0.027 mg/L. In addition, this approach was shown to be capable of distinguishing H2O2 from anions (e.g., fluoride and chloride) and organics (e.g., glycolate) and monochloramine, suggesting that it is insensitive to many neighboring compounds as long as they do not react quickly with H2O2. Hence, this study proves the combination of IC and UV detector a facile and reliable method for H2O2 measurement.
研究领域:
环境科学
·
分析化学
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 48
·期 5
·1998-2007
·
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.
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高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Zhengfei Yang,Yueyue Zhong,Minghong Fan,Yongqi Yin,Huaiguo Xue,Weiming Fang
Developing electrochemical H 2 O 2 sensors with high sensitivity and selectivity is highly desirable in the food industry. Low-dimensional transition metal oxides are promising in electrochemical sensing due to their attractive characteristics. In this study, leaf-like zeolitic imidazolate framework (ZIF-L) and stick-like zeolitic imidazolate framework (ZIF-S) were used to prepare leaf-shaped L-Co 3 O 4 (L-Co 3 O 4 ) and stick-shaped Co 3 O 4 (S-Co 3 O 4 ). The low-dimensional structure could shorten the electron transmission paths and expose more active sites. A series of characterizations were carried out to investigate the morphology and composition of these two materials. Further, the L-Co 3 O 4 and S-Co 3 O 4 were investigated for electrochemical H 2 O 2 detection. The L-Co 3 O 4 showed good electrocatalytic activity toward H 2 O 2 in the ranges of 0.5–4500 and 4500–10000 μM with a detection limit of 0.47 μM. Moreover, the S-Co 3 O 4 had good H 2 O 2 detection performance in the ranges of 0.5–4500 and 4500–10000 μM with a detection limit of 0.33 μM. The constructed sensors also showed good anti-interference ability, reproducibility, stability, and applicability.
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DOI
高影响因子
IEEE SENSORS JOURNAL
·
2023
·Vol. 23
·期 16
·18142-18149
·
IF 4.3
Mengna Liang,Lili Yuan,Congying Shao,Xingqun Zheng,Qingchun Song,Zhengrong Gu,Shun Lu
Digital imaging technology provides a unique advantage for the portable on-site detection of targeted analytes. In this work, copper nanoclusters (CuNCs) based on the eggshell membrane (ESM) were combined with the photograph-taking and color recognition functions of a smartphone to build an “ON-OFF-ON” detection platform, which realized the dual visual detection of hydrogen peroxide ( $\text{H}_{{2}}\text{O}_{{2}}$ ) and glutathione (GSH). First, a red fluorescent nanocomposite membrane (GSH-CuNCs@ESM) was prepared by in situ synthesis with GSH as the protective and reducing agent. The physical characterization results confirmed its long fluorescence (FL) lifetime ( $23.77 \mu \text{s}$ ), high quantum yield (QY, 23.79%), large Stokes shift, and good stability. In addition, it is found that $\text{H}_{{2}}\text{O}_{{2}}$ has a specific response to the GSH-CuNCs@ESM, which can quench its FL. However, the FL of the quenched membrane was restored after it was put into the GSH solution. So, visual detection of $\text{H}_{{2}}\text{O}_{{2}}$ and GSH was developed based on this phenomenon integrating with a smartphone and color recognition functions. Consequently, the limit of detection (LOD) of $\text{H}_{{2}}\text{O}_{{2}}$ is as low as 63 nM when the concentration of $\text{H}_{{2}}\text{O}_{{2}}$ is between 0 and $100 \mu \text{M}$ . The LOD of GSH is as low as $1.0 \mu \text{M}$ when the concentration of GSH was between 0 and $800 \mu \text{M}$ .
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DOI
高影响因子
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