Journal of Materials Chemistry B
·
2017
·Vol. 5
·期 22
·4233-4238
·
IF 4.543
Qi Wang,Sisheng Hu,Tian Yang,Shangshang Ma,Yuhong Liu,Chunxue Ma,Mimi Wan,Chun Mao
To detect hydrogen peroxide (H2O2) that is released in situ by cells is a challenge because of its high activity and short life time. Here, a new type of H2O2 biosensor was reported based on three-dimensional (3D) micro/nano-biointerfaces as an amicable platform to promote cell adhesion, and which can directly grow living cells on manganese dioxide (MnO2) immobilized onto a novel hollow horn-like morphology polypyrrole (hPPy) film. The composite MnO2/hPPy array films were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and elemental mapping. Further, the results of a cell adhesion test indicated that the as-obtained 3D micro/nano-array films had good cell adhesion. This proposed sensing platform provided high electroactivity and excellent electron transport with a lower detection limit, a higher sensitivity and a short diffusion distance to reaction sites by electrochemical study. The new design strategy we proposed can expand the bioapplication of 3D micro/nano-biointerfaces that can guide cell fate and electrochemical detection in cell biology.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2021
·
IF 5.876
Teng Ge,Xiaoli Jin,Jian Cao,Zhuohua Chen,Yixue Xu,Haiquan Xie,Fengyun Su,Xin Li,Qing Lan,Liqun Ye
Background H 2 O 2 , as a green and environmentally friendly oxidant, has been widely used in our daily life and industrial production. It is of epoch-making significance to develop highly efficient photocatalysts for producing H 2 O 2 . In recent years, g-C 3 N 4 has received much attention due to its high chemical stability, environmental friendliness and suitable energy band structure. However, some shortcomings including the fast recombination of photogenerated electron-hole pairs and small specific surface area in traditional 2D g-C 3 N 4 seriously impede its photocatalytic performance for the production of H 2 O 2 . Methods 1D hollow nanostructures possess intriguing physicochemical properties and are adopted to overcome the intrinsic shortcomings of g-C 3 N 4 . Herein, g-C 3 N 4 with a hollow hexagonal prism structure (CN HP) is prepared to produce H 2 O 2 . It is characterized by XRD, XPS, SEM, HRTEM, ESR and DRS. BET, PL spectra, photocurrent and EIS are used to explain the enhanced photocatalytic performance. Significant findings Compared with traditional 2D g-C 3 N 4 , the specific surface area of CN HP increases to 41.513 m 2 /g, providing more active sites. Meanwhile, its hollow tubular structure can enhance the migration of photogenerated electrons to the catalyst surface, and electrons with a longer lifetime can participate in photocatalytic reactions to achieve high efficiency. The yield of H 2 O 2 production can up to 4.08 μmol over CN HP in 40 min, which is about 7 times higher than that of traditional 2D g-C 3 N 4 , and the apparent quantum efficiency (AQE) of H 2 O 2 production at 420 nm is 2.41%. This research provides a valuable reference for the development of green materials for efficient photocatalytic production of H 2 O 2.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Biomass Conversion and Biorefinery
·
2021
·Vol. 13
·期 14
·12581-12590
·
IF 4.987
Liu Ruixia,Ding Tingting,Deng Pingping,Yan Xiaofan,Xiong Fuquan,Chen Jienan,Wu Zhiping
In order to improve the reaction activity of lignin and increase its utilization rate. Lignin extracted from poplar wood powder by deep eutectic solvent was degraded with hydrogen peroxide (H 2 O 2 ) and sodium hydroxide (NaOH) to obtain degraded deep eutectic solvent lignin (DES-lignin). The structures of DES-lignin and degraded DES-lignin were characterized by gel permeation chromatography (GPC), elemental analysis (EA), Fourier transform infrared spectroscopy (FT-IR), two-dimensional nuclear magnetic resonance spectroscopy (2D-HSQC NMR), and thermogravimetric analysis (TGA). The results indicated that the phenolic hydroxyl group of degraded DES-lignin increased by 39.62% and M w and M n decreased by 49.12% and 47.83%, respectively. C content decreased by 1.13%. The relative strength and S/G increased by 25.76% and 13.5%, respectively. The polymerization degree, β-O-4 linkages, and β-β linkages were decreased by 10.82%, 4.8%, and 4.2%, respectively. The residual residue increased by 8.3% at 800 °C. It showed that degraded DES-lignin had the advantages of strong activity, more reaction sites, narrow molecular weight distribution, less condensation structure, and thermal stability, which was more conducive to the high-value utilization of lignin.
研究领域:
林产化学与技术
·
生物质化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Gang Wang,Jiayu Gao,Yike Fu,Zhaohui Ren,Jie Huang,Xiang Li,Gaorong Han
The anticancer efficacy of chemodynamic therapy (CDT) is considerably restrained by the inadequate content of H 2 O 2 within tumor microenvironment (TME), unexpected oxidation of Fenton agents and low targeting efficiency of particulate therapeutic platforms. Herein for the first time, an implantable CDT platform was designed and synthesized by combining Fe 0 nanocrystal embedded mesoporous silica nanoparticles (FeMSN) and PCL-gelatin fibres (PG fibres), denoted as [email protected] fibres. FeMSN was fabricated via in situ reduction of ferrous ions within the mesopores of MSNs, and assembled at the surface of electrospun PG fibres by electrostatic interaction to form a fibrous mesh. The findings reflected that, in an acid condition, FeMSN nanoparticles can liberate from the composite fibres, and be effectively uptaken by 4T1 cancer cells. The FeMSN released may react with oxygen to generate H 2 O 2 in the acidic microenvironment, and subsequently transform H 2 O 2 to intracellular hydroxyl radicals, inducing enhanced cell-killing effect. By implanting the composite fibres locally at the tumor site of mice, promoted anticancer efficacy was observed with comparison of the intratumoral-injected FeMSN nanoparticles. This study suggests that [email protected] composite fibres can serve as a potential localized PDT platform for effective antitumor purposes, which may spark a series of follow-on investigations for localized cancer therapeutic technology.
研究领域:
癌症治疗
·
材料科学
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Applied Sciences-Basel
·
2020
·Vol. 10
·期 3
·894
·
IF 2.474
Jianhui Gu,Huimin Zang,Shun Yao,Xuejiao Wang,Minghui Zhu,Hang Song
Ionic liquids (ILs) are considered to be a new type of solvent due to their low vapor pressure, some unique properties and are expected to be used widely in the following days. Given their water solubility, stable chemical structure, and biological toxicity, ILs probably reach aquatic environments and become long-term pollutants. We studied the fate of benzothiazolium-based ionic liquids catalyzed by UV-H2O2in water. Due to the synergistic effect of UV and H2O2, the degradation efficiency can be significantly improved compared to any of them alone. Fitting results showed that the degradation reaction follows pseudo-first-order kinetics and reaction rate constants with hydroxyl radicals ranging from 0.0005 s−1to 0.0529 s−1. The experimental data showed that satisfactory results can be obtained at a temperature of 45 ℃, an initial concentration of ionic liquid of 0.1 M, and a hydrogen peroxide concentration of 0.1 M. We also explored the effects of chloride ions and pH on degradation reactions. In an appropriate situation, the degradation yield of [C4Bth]PF6could achieve 97% in 60 min and 99% in 90 min. The UV-H2O2combination process could provide an effective technique for the treatment of benzothiazolium-based ionic liquids in wastewater.Keywords:photocatalysis;degradation;benzothiazole ionic liquid;H2O2
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
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Xu Ding,Fengxia Wang,Hui Hu,Sarah Imhanria,Wei Wang,Ji Zhang
Green fabrication of unique structural nanoparticles has always been of increasing interest in many fields. Herein, a facile and green strategy of fabricating catkin-like CuAg nanocomposites using tea-polyphenols as reduction agent is reported. As-prepared nanocomposites have been characterized by a series of analysis. Physical characterizations show the synthesised of nanocomposites whose catkin-like special morphology. The electrochemical detection hydrogen peroxide (H 2 O 2 ) results show that, catkin-like CuAg nanocomposites have good sensitivity, stability and anti-interference and it could detect without any additional mediator or enzyme . Specifically, it shows good H 2 O 2 sensitivity of 2.55 μA mM −1 cm −2 with range of 0.1–120 mM. Therefore, the catkin-like CuAg nanocomposites prepared by an environmental-friendly synthetic strategy, would provide a good reference for other green syntheses in the future.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Zhaohui Chen,Jiacong Wu,Wenrui Huang,Yuanyuan Li,Yanli Mao,Juan Han,Yun Wang,Liang Ni
Horseradish peroxidase (HRP) is a kind of enzyme commonly used in clinical trials that is rich in the plant horseradish. It has a wide range of applications in the fields of pharmacy and pollution control . However, free enzymes are easily denatured and inactivated by environmental influences, which is not conducive to the normal progress of the reaction. At the same time, the cost of enzymes is relatively high, and it is difficult to separate and recover during the reaction. In this study, the UCST-type temperature- responsive polymer was combined with HRP under the optimal immobilization reaction conditions of 3% polymer solution concentration, 60 ℃, and pH= 8 through affinity interaction to produce UCST-type smart polymerase. The smart polymerase has stronger temperature stability, pH stability and storage stability than free enzymes. In the simulated pollutant degradation experiment, under the molar ratio of phenol to H 2 O 2 is 1:1, the temperature of 60 ℃, and pH= 7, smart polymerase can degrade 91% of phenol in a 100 mg/L phenol solution within 1 h. After five cycles of catalytic reaction , 68% of smart polymerase was recovered through cooling precipitation. In the phenol degradation experiments of two different real water samples, 88% and 90% of the phenol in the water were removed, respectively, and most of the highly active immobilized enzymes were recovered at the same time. Finally, the biotoxicity of the catalyzed reaction product is significantly reduced was demonstrated.
研究领域:
生物化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Yi Liang,Peng Zhao,Jilin Zheng,Yuanyuan Chen,Yiyi Liu,Jia Zheng,Xiaogang Luo,Danqun Huo,Changjun Hou
Reasonable sensor construction for precisely real-time detecting H2O2 produced from living cells has always been of great significance and challenges. Due to the excellent catalytic efficiency and unparalleled peroxidase-like activity, single-atomic catalysts with Fe-Nx active sites show great potential in H2O2 detection. These special atomic active sites make it easier for the Fenton reaction to occur, which provides basic support for H2O2 sensors. Their application in the in situ real-time detection of H2O2 has important market prospects. Herein, single-atomic Fe catalysts with distorted graphitic carbon are obtained through a simpler preparation method. A precursor hemin@zeolitic imidazolate framework-8 (hemin@ZIF-8) is calcined at a high temperature and carbonized to get the nitrogen-carbon codoped Fe single atoms (Fe SAs-N/C) and then successfully prepare a H2O2 electrochemical sensor by modifying it on a glassy carbon electrode (GCE). Its peroxidase activity is calculated by enzymatic kinetics, which shows a better peroxidase activity compared with horseradish peroxidase and other reported single-atom (SA) materials. Moreover, the electrocatalytic kinetics is explained by Laviron calculation, which more directly confirms that it has a faster electron transfer rate. Importantly, Fe SAs-N/C@GCE has a wider linear range than sensors combined with other SA materials and a low detection limit of 0.34 μM. It is an attractive design of H2O2 sensors and single-atomic catalysts with superior substrate affinity that are novel alternatives to natural enzymes.
研究领域:
分析化学
·
材料科学
·
生物化学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Xiong Sheng,Shuai Kang,Bangxing Li,Fengjuan Xue,Wenqiang Lu
The production of H 2 O 2 by oxygen reduction reaction (ORR) is low energy consumption and environmentally friendly. Pd/C is an effective electrocatalyst for oxygen reduction, while its selectivity is low due to a tendentious four-electron pathway ORR process. The limited reserves of palladium and inevitable corrosion issue of carbon support add extra obstacles toward practical application. In this work, Pd nanoparticles with 3–5 nm were synthesized on MXene sheets. Results indicated that Pd/MXene exhibited 3.5∼4.2 times ring current than Pd/C and much higher H 2 O 2 selectivity. The H 2 O 2 yield of Pd/MXene was measured to be 1.43 mol g −1 h −1 . The excellence in electrochemistry was from the synergistic effect of Pd and MXene. The existence of MXene increases metallic Pd on the surface. This study on MXenes as supports of Pd nanoparticles for two-electron oxygen reduction provides extensive reference significance to H 2 O 2 generation.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Yilan Jiang,Peifang Wang,Tingyue Chen,Keyi Gao,Yiran Xiong,Yin Lu,Dionysios D. Dionysiou,Dawei Wang
Iron-based materials are difficult to produce single oxygen ( 1 O 2 ) efficiently from H 2 O 2 . Herein, we demonstrate that 1 O 2 production from H 2 O 2 can be manipulated by regulating the lattice distortion degrees of spinel ferrite through controlling the contents of Co and Ni in Co 1−x Ni x Fe 2 O 4 . Typically, NiFe 2 O 4 , which owns the lowest lattice distortion degree, can produce 1 O 2 as the dominated reactive oxygen species with·O 2 - as the intermediate. Due to the production of 1 O 2 , the NiFe 2 O 4 /H 2 O 2 system removes bisphenol A (BPA) completely within 180 min but removes only ∼ 4% of benzoic acid . In addition, the system demonstrates significant resistance to water matrix interference, as 50 mM of Cl - , NO 3 - , H 2 PO 4 - , and humic acid inhibited the BPA degradation by only ∼0%, ∼2%, ∼40%, and ∼3%, respectively. Our work may shed light for regulating the formation of 1 O 2 from H 2 O 2 through the rational design of iron-based catalysts for Fenton-like reactions.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Ziyin Yang,Zhigao Tian,Chengcheng Qi
The development of a high-performance electrocatalyst is the key to the construction of highly sensitive electrochemical sensing methods. In this work, we design Ru nanoclusters supported on MnO2 nanotubes (c-Ru/MnO2) as an electrocatalyst for boosting electrochemical nonenzymatic hydrogen peroxide (H2O2) sensing. c-Ru/MnO2 is synthesized based on a facile hydrothermal method, followed by cation exchange and calcination. The obtained c-Ru/MnO2 nanocomposite is characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and electrochemical methods. Electrochemical studies and theoretical calculations reveal that the anchoring of Ru nanoclusters not only makes MnO2 nanotubes exhibit higher electrochemical surface area and faster electron transfer rate but also promotes the strong adsorption of H2O2 and optimizes the interactions with the key intermediates OOH*/OO*. Thanks to the synergistic effect between Ru nanoclusters and MnO2 nanotubes, the sensor based on c-Ru/MnO2 exhibits a low anode peak potential of 0.42 V and an extremely high sensitivity of 2967.9 μA mM–1 cm–2 toward H2O2. Therefore, c-Ru/MnO2 is demonstrated to be an advanced electrocatalyst for sensitive electrochemical sensing of H2O2.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Kai Wang,Zhu Shu,Jun Zhou,Zhengliang Zhao,Yuchen Wen,Shuxin Sun
Piezocatalytic H 2 O 2 production has attracted significant attention as a green alternative to traditional anthraquinone methods with heavy environmental pollution and high energy consumption. However, since the efficiency of piezocatalyst in producing H 2 O 2 is poor, searching for a suitable method to improve the yield of H 2 O 2 is of great interest. Herein, a series of graphitic carbon nitride (g-C 3 N 4 ) with different morphologies (hollow nanotube, nanosheet and hollow nanosphere) are applied to enhance the piezocatalytic performance in yielding H 2 O 2 . The hollow nanotube g-C 3 N 4 exhibited an outstanding H 2 O 2 generation rate of 262 umol·g −1 ·h −1 without any co-catalyst, which is 1.5 and 6.2 times higher than nanosheets and hollow nanospheres, respectively. Piezoelectric response force microscopy, piezoelectrochemical tests, and Finite Element Simulation results revealed that the excellent piezocatalytic property of hollow nanotube g-C 3 N 4 is mainly attributed to its larger piezoelectric coefficient, higher intrinsic carrier density, and stronger external stress absorption conversion. Furthermore, mechanism analysis indicated that piezocatalytic H 2 O 2 production follows a two-step single-electro pathway, and the discovery of 1 O 2 furnishes a new insight into explore this mechanism. This study offers a new strategy for the eco-friendly manufacturing of H 2 O 2 and a valuable guide for future research on morphological modulation in piezocatalysis.
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）