DYES AND PIGMENTS
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2021
·
IF 4.889
Yingchao Zhang,Yunfei Xie,Mingjuan Zhou,Erik B. Berda,Danming Chao
The elegant electroswitchable color/emission properties of electrochromic/electrofluorochromic dual-functional materials motivates the exploration of their new applications. In this work, a new poly (urea-urethane) was synthesized via nucleophilic copolymerization of electroactive oligoaniline derivative, solid-emissive tetraphenylethylene groups, and alkyl isocyanate. The resultant poly (urea-urethane) exhibited good electroactivity and desirable aggregation-induced emission properties. High-performance electrochromic/electrofluorochromic behavior had been disclosed with a high optical contrast ratio of ΔT = 50.4%, a moderate fluorescence on/off ratio of 10.5, and high coloration efficiency of 503 cm 2 /C at 768 nm. A reflective/emissive dual-mode display device had also been manufactured based on the resultant poly (urea-urethane) and charge-balancing V 2 O 5 , exhibiting a reversible color change and tunable fluorescence conversion upon the electric stimulus. Furthermore, this polymer showed an interesting color/fluorescence response to H 2 O 2 , due to the linkage mechanism between its redox states and optical properties . The spray-coated poly (urea-urethane) test strips were employed in visualized dual-determination of H 2 O 2 with gradual color change from gray to dark green, along with an obvious fluorescence change from light blue to dark, which displays easy operation and rapid detection.
研究领域:
材料科学
·
化学
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2019
·
IF 5.256
Miao-Feng Fan,Hui-Min Wang,Li-Jiao Nan,Ai-Jun Wang,Xiliang Luo,Pei-Xin Yuan,Jiu-Ju Feng
A biomimetic assembly of per-O-methylated-cyclodextrin dimer with cobalt proto-porphyrin (Co III -PPIX@Py2CD) was achieved via covalent linkage between Co III of Co III -PPIX and pyridine N of Py2CD (primarily synthesized by the acyl chlorination reaction of two β-CDs monomers with 3,5-bis (bromomethyl) pyridine). Ultraviolet–visible (UV–vis) and circular dichroism (CD) absorption spectroscopy , and NMR hydrogen spectroscopy (H 1 -NMR) were adopted to carefully characterize the structure of Py2CD and its functional assembly with Co III -PPIX. X-ray photoelectron spectroscopy (XPS) was employed to affirm the binding of the as-obtained Co III -PPIX@Py2CD, whose electrochemical kinetics were extensively studied to validate the feasibility in the catalytic reduction of hydrogen peroxide (H 2 O 2 ). The developed sensor displayed the wide linear range for H 2 O 2 detection and the low detection limit of 2.47 × 10 −7 M. This work sheds some constructive lights on rational design and synthesis of preeminently biomimic carrier and high cost-effectiveness catalyst for (bio)analytical applications.
研究领域:
生物化学
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分析化学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
·
IF 4.175
Di Cheng,Tuo Wang,Guangxue Zhang,Huimin Wu,He Mei
Cu x Co 3-x O 4 (x = 0.5, 1, 1.5, 2) are successfully synthesized through hydrothermal and calcination processes. A series of electrochemical tests reveal that all of them exhibit electrocatalytic activity towards glucose and H 2 O 2 . Among them, CuCo 2 O 4 (x = 1) has a unique double-shelled hollow structure and shows higher catalytic performance. The electrochemical sensor based on CuCo 2 O 4 displays a linear range from 2.5 μM to 7.9 mM, with a sensitivity of 400.0 μA mM −1 cm −2 for the detection of glucose. As for H 2 O 2 , it shows a linear range from 10.0 μM to 8.9 mM, with a sensitivity of 94.1 μA mM −1 cm −2 . The sensor also exhibits short response time (<3 s), good selectivity, reproducibility, and stability over 18 days. Thus, this novel non-enzyme sensor has potential application in glucose and H 2 O 2 detection.
研究领域:
生物化学
·
材料科学
·
分析化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Shaolong Wang,Dingding Ye,Hao Liu,Xun Zhu,Zhenfei Liu,Rong Chen,Qiang Liao,Yang Yang
The in-situ H 2 O 2 electrosynthesis by two-electron oxygen reduction reaction employing renewable electricity is a promising alternative to traditional anthraquinone process due to its security, environmental friendliness and excellent cost effectiveness, which requires high-performance, cost-effective and environmental-friendly electrocatalysts . A bamboo-derived O-doped rocky electrocatalyst is developed by facile pyrolysis and acid treatment for high-efficiency electroreduction of O 2 to H 2 O 2 . Three-dimensional interconnected hierarchical pores in rocky electrocatalysts expose abundant electroactive sites and facilitate mass transfer of reaction species. From the results of rotating ring-disk electrode test, a H 2 O 2 selectivity up to 80% and superior electrocatalytic activity of the prepared electrocatalyst are achieved by surface oxygen functionalization induced by acid treatment. At the optimal catalyst loading of 2 mg cm −2 , prominent H 2 O 2 productivity of 1037 mmol g c a t a l y s t − 1 h − 1 with high current efficiency up to 74.1% is achieved at 30 mA cm −2 by air-breathing cathode. Higher H 2 O 2 productivity (1525 mmol g c a t a l y s t − 1 h − 1 ) is yielded by further raising the current density to 50 mA cm −2 . Moreover, the durability test of the cathode through ten consecutive runs demonstrates its great stability for electrocatalytic generation of H 2 O 2 . This work inspires the development of promising biomass-derived electrocatalysts for green and sustainable on-site H 2 O 2 electrosynthesis.
研究领域:
材料科学
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环境科学
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电化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Li Wang,Kun Ge,Jiaqi Duan,Xiaomeng Du,Guoqiang Zhou,Lili Ma,Shutao Gao,Jinchao Zhang
Chemodynamic therapy (CDT) based on hydroxyl radicals (•OH) to suppress tumor cells is a promising strategy due to its efficacy and safety. Nevertheless, in tumor cells, CDT still faces challenges such as insufficient •OH and weak killing effect of tumor cells under physiological conditions due to inadequate amounts of endogenous hydrogen peroxide (H 2 O 2 ) and heightened glutathione expression. These challenges limit the therapeutic potential of CDT. To improve the effects of CDT, combination treatment strategies have been developed. Here, we report a rationally designed nanocomposite (CaO 2 @Cu-LA) with self-supplying H 2 O 2 ability from calcium peroxide, and nitric oxide (NO) generation ability from l -arginine. NO molecules not only exhibit a strong killing effect, but also have the potential to transfer into the more cytotoxic substance peroxynitrite anion by reacting with reactive oxygen species. The results showed that CaO 2 @Cu-LA could significantly suppress tumor growth by increasing •OH radicals and NO molecules. Taken together, the strategy developed here provides a good application foreground to yield a remarkable synergistic antitumor effect of CDT and NO gas therapy.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Wei Gan,Xucheng Fu,Juncheng Jin,Jun Guo,Miao Zhang,Ruixin Chen,Chunsheng Ding,Yuqing Lu,Jianrou Li,Zhaoqi Sun
Developing efficient and facilitated recycling photocatalysts for H 2 O 2 formation is an ideal strategy for solar-to-chemical energy conversion. In this work, we synthesized ultrathin C 3 N 5 nanosheets through the process of thermal polymerization and polyvinylpyrrolidone (PVP)-assisted solvent exfoliation. Subsequently, the obtained ultrathin C 3 N 5 nanosheets were tightly attached to the surface of TiO 2-x arrays, resulting in an enhanced photocatalytic H 2 O 2 production rate. The density functional theory (DFT) calculations demonstrate that an internal electric field (IEF) is generated between the TiO 2-x array and the ultrathin C 3 N 5 due to the different work functions. The presence of IEF provides an additional driving force for carrier separation and transfer in the heterointerface. Benefitting from this unique strategy, the optimal heterojunction obtains the highest H 2 O 2 formation rate (2.93 μmol/L/min), which is about 4.1 times than that of TiO 2-x arrays. The rotating disk electrode (RDE) analysis manifests H 2 O 2 formation through 2e - -dominated oxygen reduction reaction (ORR). This research provides an innovative strategy for assembling a type-II heterojunction with a useful IEF for efficient photocatalytic H 2 O 2 production.
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PubMed
高影响因子
ACS ES&T Engineering
·
2023
·
IF 7.1
Beiping Zhang,Chaoting Guan,Qin Guo,Run Huang,Jin Jiang
Electrochemical technologies and permanganate oxidation are two attractive strategies in water treatment due to their low cost, easy operation, good adaptability, and environmental friendliness. Interestingly, recent studies have demonstrated that the combination of electrolysis and Mn(VII) (E-Mn(VII) process) shows a synergetic effect on organic contaminants degradation. However, the underlying mechanism of the E-Mn(VII) process remains unclear. In this study, the enhanced removal of diclofenac (DCF) by the E-Mn(VII) process was also demonstrated, and the main reactive species were reidentified. It was found that H2O2 was considerably formed via the reduction of O2 on the cathode, and it played a key role in facilitating Mn(VII) transformation into MnO2. Increasing O2 concentration, working potential, and pH value were conducive to H2O2 formation as well as Mn(VII) transformation to MnO2. Higher Mn(VII) dosages did not impact H2O2 formation but also led to faster MnO2 formation. The enhanced formation of MnO2 was favorable for the fast degradation of DCF in the E-Mn(VII) process owing to the catalytic effect of MnO2 on Mn(VII) oxidation. This was confirmed by the observation that (i) the E-Mn(VII) process showed a similar pH-dependent oxidation trend to that of MnO2 catalytic oxidation of Mn(VII) (i.e., the reactivity was much stronger at lower pH); and (ii) the addition of MnO2 prepared ex situ had a significant enhancing effect on DCF oxidation by the E-Mn(VII) process. Moreover, the possible contribution of reactive manganese intermediates such as soluble free Mn(III), Mn(VI), and Mn(V) was ruled out by the results of the probe experiments, UV–visible spectrophotometry, and examining the reactivity of Mn(III) complexes prepared ex situ. Also, the results of radical scavenging experiments indicated the negligible contribution of HO•. Furthermore, for the practical application of the E-Mn(VII) process in water decontamination, suitable operating parameters (e.g., a moderate potential and relatively lower pH) should be determined to avoid the fast loss of Mn(VII) and the electrical energy consumption. Overall, this work brings new insights into the reaction mechanism of the E-Mn(VII) process as well as proposes an efficient, sustainable, and feasible strategy for water and wastewater treatment.
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高影响因子
APPLIED GEOCHEMISTRY
·
2021
·
IF 3.524
Fuwei Sun,Tianhu Chen,Xuehua Zou,Haibo Liu,Ziyang Chu,Daobing Shu,Hanlin Wang,Fangju Huang,Dong Chen
Siderite is a conventional mineral of sedimentary rock and can activate H 2 O 2 to produce hydroxyl radicals (·OH). Bisphenol A (BPA), 2,4-dichlorophenoxyacetic acid (2,4-D), and sodium sulfadiazine are selected as typical micropollutants to be degraded in a siderite-activated H 2 O 2 system. To determine the influence of solution chemistry on siderite-activated Fenton-like reactions, the amount of ·OH was quantified by using benzoic acid as a probe molecule, and then, kinetic fitting was used to analyze the reaction rate. The results showed that in the range of pH values from 3 to 9, the dissolved Fe 2+ and the lattice Fe(Ⅱ) of siderite activate H 2 O 2 to generate ·OH. An increase in siderite dosage and H 2 O 2 concentration favored the generation of ·OH, but higher siderite dosage and H 2 O 2 concentration suppressed the production rate. The inhibition order of anions on the generation of ·OH was confirmed as follows C l − > N O 3 − > S O 4 2 − . Little difference was observed in the presence of Ca 2+ and Mg 2+ , while the presence of Mn 2+ significantly promoted the production of ·OH. The suppression of humic acid (HA) became more serious as the HA concentration increased. Cycling experiments proved that the system could still produce ·OH in four cycles, although the production rate experienced a slight decrease. The experimental results suggested the role of siderite in the degradation of organic pollution in the process of in-situ soil and groundwater remediation.
研究领域:
环境科学
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化学
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DOI
高影响因子
WATER RESEARCH
·
2021
·
IF 11.236
Lifa Ge,Yamei Yue,Wei Wang,Fatang Tan,Shenghua Zhang,Xinyun Wang,Xueliang Qiao,Po Keung Wong
Currently existing Fenton-like catalysts were limited in wastewater treatment owing to their potential transition-metal poisoning, narrow applicable pH range and high dependence on external energy excitation. In this work, the MgNCN/MgO nanocomposites were firstly synthesized by a facile one-pot calcination of melamine and basic magnesium carbonate, and used as novel H 2 O 2 activator for antibiotic removal. It was found that the MgNCN/MgO composite calcined at 550°C with the mass ratio of melamine to basic magnesium carbonate at 2:1, exhibited an excellent catalytic ability to tetracycline (TC) degradation in a wide pH range of 4-10 without any external energy input. More than 90% of TC (100 mL, 50 mg/L) could be degraded within 30 min by 10 mg of the nanocomposite in the presence of 0.2 mL of 30 wt% H 2 O 2 . Based on the experimental results, it was concluded that the Mg-N coordination between MgNCN and MgO in MgNCN/MgO nanocomposites activated H 2 O 2 to produce primary singlet oxygen ( 1 O 2 ) and minor hydroxyl radicals (·OH), responding for TC degradation. In addition, the degradation pathways of TC were deduced by determining the generated intermediates during the degradation process. This work provided a novel idea for designing transition-metal-free catalysts for nonradical activation of H 2 O 2 in the absence of external energy excitation.
研究领域:
环境科学
·
催化化学
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PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2020
·Vol. 22
·期 11
·1-9
·
IF 2.132
Gao Wenshan,Zhang Yuangong,Zheng Ying,Zhang Hailei,Wang Xiaoke,Bai Libin,Wu Yonggang,Ba Xinwu
The 19 F nuclear magnetic resonance (NMR) has been widely employed as a detection tool in biological studies due to its low biological background, noninvasiveness, high sensitivity, and real-time monitoring capability. Herein, we report a one-pot synthesis of halloysite nanotubes (HNTs) treated with benzeneboronic acids (6FBB) to afford the HNT-based 19 F NMR probe which is capable to detect the H 2 O 2 in low concentration. The product was well characterized by nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FTIR), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). The intensity of signals of 19 F was enhanced with the increasing concentration of fluorine, and the signals apparently shifted from − 62.68 to − 62.85 ppm upon the addition of H 2 O 2 . The obtained 19 F NMR probes also displayed a long spin-spin (T2) relaxation time (91.27 ms), which can strengthen image intensity. Moreover, the 19 F NMR probe exhibited non-toxic against HeLa cell. The 19 F NMR probe may serve as a desirable candidate to predict the change of H 2 O 2 in vivo.
研究领域:
生物化学
·
医学影像学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Hailong Tian,Mengzhu Zhang,Guoxia Jin,Yue Jiang,Yuxia Luan
Chemodynamic therapy (CDT) utilizes Fenton catalysts to convert intracellular hydrogen peroxide (H 2 O 2 ) into cytotoxic hydroxyl radical (OH∙) for tumor therapy, but endogenous H 2 O 2 is usually insufficient to achieve satisfactory tumor therapy effect. Engineering an efficient CDT nanoplatform for satisfactory cancer therapy remains a challenge. Herein, we rationally designed a Cu-based metal-organic framework-199 (MOF-199) nanoplatform integrating vitamin k3 (Vk3) for amplified CDT-mediated cancer therapy, which could accumulate efficiently in tumor tissues through enhanced permeability and retention (EPR) effect. The MOF-199 nanoparticles (MOF-199 NPs) were dissociated by glutathione (GSH) into MOF-199 fragments, which triggered Fenton-like reaction for CDT. On the one hand, Vk3 was catalyzed by NAD(P)H quinone oxidoreductase-1 (NQO1) to produce sufficient H 2 O 2 to activate Fenton-like reaction. On the other hand, GSH was largely consumed in the tumor microenvironment. Thus, this nanoplatform enabled sufficient cytotoxic reactive oxygen species (ROS) for amplified CDT effect, demonstrating effective tumor growth inhibition with minimal side-effect in vivo. Our work provides an innovative strategy to modulate GSH and H 2 O 2 levels for amplified CDT.
研究领域:
癌症治疗
·
纳米技术
·
生物化学
·
药学
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Yang Guo,Erzhuo Zhao,Jun Wang,Xiaoyuan Zhang,Haiou Huang,Gang Yu,Yujue Wang
The abatement of several emerging contaminants (ECs) in groundwater by conventional ozonation and three ozone-based advanced oxidation processes (AOPs) - catalytic ozonation with manganese dioxide (MnO 2 ), conventional peroxone (O 3 /H 2 O 2 ), and electro-peroxone (EP) - was compared in this study. The addition of MnO 2 , H 2 O 2 , or electro-generation of H 2 O 2 during ozonation enhanced ozone transformation to hydroxyl radicals to different extent. These changes did not considerably influence the abatement of ECs with moderate to high ozone reactivities ( k O 3 ≥500 M -1 s -1 ), whose abatements were similar with >90 % during all four processes. In comparison, the abatements of ozone-refractory ECs ( k O3 < 15 M -1 s -1 ) were lower during conventional ozonation (∼40–85 % abatement), but could be enhanced by ∼10–40 % during the three ozone-based AOPs. Besides enhancing ozone-refractory EC abatement, the three AOPs, especially the O 3 /H 2 O 2 and EP processes, reduced considerably bromate formation compared to conventional ozonation. These results demonstrate that the EP process performs similarly as catalytic ozonation and O 3 /H 2 O 2 processes in terms of EC abatement and bromate control. Considering its more convenient, flexible, and safer way of operation, the EP process may provide an attractive alternative to the two more traditional AOPs for water treatment.
研究领域:
环境科学
·
水处理工程
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）