SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2020
·
IF 3.232
Jun-Tao Cao,Wen-Sheng Zhang,Xiao-Long Fu,Hui Wang,Shu-Hui Ma,Yan-Ming Liu
A high-efficient chemiluminescence (CL) platform for highly selective and sensitive H 2 S detection was constructed on the basis of the quenching effect of S 2 − on the copper ion modified graphitic carbon nitride nanosheets (Cu 2+ -g-C 3 N 4 NSs) enhanced luminol-H 2 O 2 system. Cu 2+ -g-C 3 N 4 NSs with horseradish peroxidase-like catalytic activity were prepared and provide a great improvement for luminol-H 2 O 2 system. The presence of S 2 − induced the formation of CuS precipitate on g-C 3 N 4 NSs surface. The precipitate can block the catalytic Cu 2+ sites on the g-C 3 N 4 NSs surface, resulting in a great CL decrease of CL system. Based on such a mechanism, a simple, highly selective and sensitive CL biosensor for H 2 S detection was designed. Under the optimized conditions, luminol-H 2 O 2 -Cu 2+ -g-C 3 N 4 NSs system gave a decrease of CL intensity with the Na 2 S concentration increasing. The CL biosensor is in a linear range of 10.0 pM–50.0 nM and the detection limit for detecting Na 2 S is as low as 2.0 pM. Moreover, the method here has enjoyed a successful application for determining H 2 S in human plasma samples and the recovery is between 95.7% and 110.0%.
研究领域:
分析化学
·
生物医学
✓ 已验证
DOI
PubMed
高影响因子
Small Methods
·
2024
·
IF 10.7
Jingze Yang,Dong Lin,Yushan Chen,Tiejun Li,Jing Liu
Solution processing has emerged as a promising technique for the fabrication of oxide thin-film transistors (TFTs), offering advantages such as low cost, high throughput, and exceptional compositional control. However, achieving reasonable electrical properties typically demands high annealing temperatures in the fabrication process. In addressing this challenge, a novel combination strategy is proposed that involves integrating the H 2 O 2 inducement technique with infrared (IR) irradiation annealing. The study investigates the effects of precursors and IR irradiation annealing temperatures on the electrical properties of In 2 O 3 TFTs. It is found that H 2 O 2 can help accelerate the decomposition of organic residues, while IR irradiation annealing could enhance the film densification. By employing the proposed strategy, metal oxide TFTs consisting of a Zr-Al-O dielectric fabricated at 230 °C and an In 2 O 3 channel layer fabricated at 185 °C demonstrated high performance with field-effect mobility = 31.7 cm 2 V −1 ·s −1 , threshold voltage = 1.3 V, subthreshold swing = 0.13 V per decade, and on-to-off current ratio = 1.1 × 10 5 . This work demonstrates the proposed combinational strategy is a general method to fabricate not only metal oxide semiconductors but also dielectrics.
研究领域:
材料科学
·
半导体器件
·
薄膜技术
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 9
·1-10
·
IF 5.705
Sun Ying,Wang Ruixue,Liu Xuan,Shan Guiye,Chen Yanwei,Tong Ti,Liu Yichun
Platinum nanoparticles (PtNPs) were uniformly grown on the surface of gold nanorods (AuNRs) by a laser irradiation procedure. Transmission electron microscopy confirmed that the PtNPs are uniformly grown on the surface of the AuNRs. The formation of PtNPs on the AuNRs leads to a red-shift of the absorption maximum from 734 nm to 766 nm. In addition, the efficiency of surface enhanced Raman scattering (SERS) is increased, but the photothermal conversion efficiency is decreased compared to pure AuNRs. The result indicates that electron transfer occurs between gold and platinum. The peroxidase mimicking effect of PtNPs, AuNRs and Au/Pt NRs by catalyzing the oxidation of colorless 3,3’,5,5’-tetramethylbenzidine (TMB) to blue oxidized 3,3’,5,5’-tetramethylbenzidine (oxTMB; a quinone) in the presence of H 2 O 2 . The catalytic activity of Au/Pt NRs is higher than that of sole AuNRs or PtNPs by factors of 4.2 and 2.1, respectively. Thus, Au/Pt NRs have been used for the detection of peroxide and the limit of detection is 0.04 μM. This work provides an approach to integrate the peroxidase mimicking effect with SERS enhancement for potential application in detection.
A schematic diagram for the laser-induced growth of Au/Pt NRs and the colorimetric determination of hydrogen peroxide concentration with their peroxidase mimicking properties. The limit of detection is 0.04 μM based on the use of Au/Pt NRs as a catalyst.
研究领域:
纳米材料
·
分析化学
·
生物医学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR MEDICINE
·
2018
·Vol. 41
·期 6
·3195-3202
·
IF 2.784
Dan Wang,Li Bie,Yanbin Su,Haoran Xu,Fengrong Zhang,Yanwen Su,Bo Zhang
Lithocholic acid (LCA) is known to kill glioma cells while sparing normal neuronal cells. However, the anti-glioma mechanism of LCA is unclear at present. Although malondialdehyde (MDA) is not specific to detect tumors, biologically active α,β-unsaturated aldehydes can be used to detect the outcome of gliomas, especially the mitochondria, as a research tool. The purpose of this research was to determine the optimum conditions for a lipid peroxidation model, according to changes in the aldehydes formed from the reaction between 2-thiobarbituric acid and biologically active α,β-unsaturated aldehydes. Experimental methods and procedures were successfully established for a model of lipid peroxidation induced by H2O2 in glioma mitochondria for glioma treatment and optimum conditions for LCA treatment were determined. The optimal conditions for the model were a glioma mitochondrial concentration of 1.5 mg/ml, H2O2 concentration of 0.3 mg/ml, duration of action of 30 min, and addition of 4.0 ml of 46 mM thiobarbituric acid. The effect of LCA, as determined by changes in the UV peaks at 450, 495, and 532 nm, was optimal at a concentration of 100 µM, a duration of action of 15 min, and in an acidic microenvironment. The study concluded that a suitable concentration of LCA has anti-glioma effects as determined by the effect on changes in the UV peaks at 450, 495 and 532 nm and the mitochondrial model developed should be conducive to further in-depth research.
研究领域:
癌症研究
·
神经科学
·
药理学
·
细胞生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Qian Guo,Wenjie Zhu,Daoli Yang,Xi Wang,Yinghao Li,Chao Gong,Jiali Yan,Jinli Zhai,Xiaoya Gao,Yongming Luo
Pyrite is widely used in Fenton reaction for degradation of pollutants and exhibits great potential for environmental remediation, however, its efficiency is greatly compromised by extra H 2 O 2 and pH adjustment. Herein, a pyrite based green solar photo-Fenton system for carbamazepine (CBZ) treatment is constructed, involving the use of simulated sunlight and natural organic acids with in situ-generated H 2 O 2 and without extra pH adjustment. The addition of organic acids including tartaric acid (TA), citric acid (CA), and ascorbic acid (AA) can form complex with iron in pyrite, which promotes the Fe(II) dissolution. Upon irradiation, pyrite could be excited to produce photoelectrons , which would reduce oxygen to produce H 2 O 2 through a two-step route assisted by organic acids. The simulated sunlight and organic acids promoted the in-situ production of H 2 O 2 and Fe(II) species, sustaining an efficient Fenton reaction . This produced massive hydroxyl radical ( OH), as demonstrated by the active species capture experiment. Compared with no degradation of CBZ under pure pyrite, the degradation efficiency of CBZ reached to 70%, 60%, and 53% in pyrite/TA, pyrite/CA, pyrite/AA within 30 min under simulated solar light irradiation, respectively. This work reports the first use of natural pyrite, a typical Fe-mineral semiconductor, to produce OH for CBZ degradation through natural additive assisted Fenton reaction excluding the adding extra H 2 O 2 and pH adjustment.
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
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Rajendran Ramachandran,Changhui Zhao,Muniyandi Rajkumar,Krishnamoorthy Rajavel,Pengli Zhu,Wenlu Xuan,Zong-Xiang Xu,Fei Wang
The porous structure of three-dimensional NiO microspheres on titanium carbide (NiO/Ti 3 C 2 T x ) is prepared by calcination of Ni-MOF/Ti 3 C 2 T x in the air. The crystalline structure and morphology of the obtained hybrid are characterized with various tools such as X-ray photoelectron spectroscopy and X-ray diffraction, scanning electron microscope, transmission electron microscope, and Brunauer-Emmett-Teller surface analyzer techniques. As-prepared NiO/Ti 3 C 2 T x hybrid is used for two noteworthy applications in electrochemistry like supercapacitor and non-enzymatic hydrogen peroxide (H 2 O 2 ) sensor. NiO/Ti 3 C 2 T x electrode exhibited an enhanced specific capacity of 630.9C g −1 at a current density of 1 A g −1 in comparison to pure NiO (376.8C g −1 ). Furthermore, the H 2 O 2 sensing performance of the NiO/Ti 3 C 2 T x modified glassy carbon electrode is evaluated in 0.5 M of NaOH solution and the electrode showed a low detection limit of 0.34 μM with a wider range of linear response 10 μM to 4.5 mM. The higher specific surface area and porosity of NiO/Ti 3 C 2 T x allow more electro-active site for electrochemical redox reactions in the direction of H 2 O 2 sensing and supercapacitor. Moreover, Ti 3 C 2 T x prevents from fouling in 3D porous network and leaching effect, and beneficial for easy access of electrolyte ions and efficient electron transport to the electrode surface resulted in improved electrochemical applications.
研究领域:
材料科学
·
电化学
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2020
·
IF 1.943
Xiaoyan Cao,Hui Yang,Qiulian Wei,Yanting Yang,Mei Liu,Qingyun Liu,Xianxi Zhang
The Pt/NiCo layered double hydroxides nanocomposites (Pt/NiCo-LDH NCs) have been successfully prepared by a one-pot hydrothermal method. Pt/NiCo-LDH was demonstrated to possess an excellent peroxidase-like activity together with a weak oxidase-like activity, evaluating in virtue of rapid catalytic oxidization of 3, 3′, 5, 5′-tetramethylbenzidine (TMB) by H 2 O 2 into a blue oxidation product (oxTMB) only in 30 s. The short response time is very important for designing colorimetric sensors to realize real time detection. The catalytic behaviors of Pt/NiCo-LDH followed the Michaelis-Menten kinetics, possessing a good affinity towards both TMB and H 2 O 2 . The catalytic mechanism of Pt/NiCo-LDH is due to OH radicals from decomposing of H 2 O 2 . Based on the high peroxidase mimetic activity of Pt/NiCo-LDH, a rapid and convenient colorimetric sensing platform for H 2 O 2 and glutathione has been successfully constructed. Under optional conditions, the colorimetric platform shows a sensitive response to H 2 O 2 and glutathione in the linear range of 10–90 mM and 50–500 mM with a limit of detection of 0.76 mM and 3.77 mM, respectively.
研究领域:
生物化学
·
分析化学
·
纳米材料科学
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2020
·
IF 9.13
Tianyu Li,Lifa Ge,Xingxing Peng,Wei Wang,Weixian Zhang
Advanced oxidation processes (AOP) based on nonradicals have attracted growing attentions because nonradical systems require much less oxidants and have low susceptibility to radical scavengers. Herein, a novel Fenton-like system that utilizes nonradicals was explored. It was derived from g-C 3 N 4 /MgO activated H 2 O 2 , and can reduce the H 2 O 2 stoichiometry from 0.94%−0.18% to 0.03%. Sulfamethoxazole (SMX), a widely used sulfonamide, was used as the model pollutant to evaluate the efficacy of the system. It was observed for the first time that organic pollutants can be degraded with singlet oxygen ( 1 O 2 ) through a nonradical pathway in the g-C 3 N 4 /MgO H 2 O 2 system. The reduced H 2 O 2 consumption was the net result of continuously-recycled H 2 O 2 from the reactions between H 2 O 2 and g-C 3 N 4 /MgO. Based on experimental results and theoretical calculations, the synthesis of g-C 3 N 4 and MgO forms a N-Mg bond with strong ability to absorb electrons and the electron transfer of H 2 O 2 to N-Mg bonding is accelerated, activation of H 2 O 2 to generate 1 O 2 . Experimental data showed that organic pollutants can be degraded rapidly over a wide pH range. Findings of this study point to a cyclical but stable Fenton-like system with reduced H 2 O 2 requirement for cost-effective remediation and treatment of organic pollutants and toxic wastes.
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
CHEMOSPHERE
·
2021
·
IF 7.086
Yun Xia,Nan Li,Wangyang Lu,Wentao Wang,Yuyuan Yao,Zhexin Zhu,Tiefeng Xu,Yan Gu,Wenxing Chen
The overuse of antimicrobials has resulted in serious damage to the ecosystem and human health. Therefore, the development of an efficient, stable, and reusable catalyst to eliminate antimicrobials under mild conditions is highly desired. Drawing inspiration from the metabolism of drugs by the enzymes in the human body, such as heme catalase , we developed a simulated enzyme catalyst, perchloride iron phthalocyanine (FePcCl 16 ), immobilized on pyridine-modified multiwalled carbon nanotubes (FePcCl 16 -Py-MWCNTs). In the catalyst, FePcCl 16 worked as the active site, and the axial fifth ligand, 4-aminopyridine, was introduced to cleave H 2 O 2 heterolytically. Inspired by the reaction mechanism of heme catalase and H 2 O 2 , the catalytic system was designed based on FePcCl 16 -Py-MWCNTs for oxidizing 4-chloro-3,5-dimethylphenol (PCMX) by H 2 O 2 activation. The results showed that the catalytic activity of the system was significantly increased under simulated solar light irradiation, which can promote electron transfer for heterolytic cleavage of H 2 O 2 . The enzyme-like catalyst achieved much higher catalytic activity than the Fenton reaction when the pH was close to neutral. It turned out that the main active species was high-valent iron-oxo (Fe(Ⅳ) = O) rather than hydroxyl radial (•OH) or superoxide radical (•O 2 − ), different from most mechanisms. Ultraperformance liquid chromatography-high-definition mass spectrometry showed that the substrate was degraded to small molecule acids by Fe(Ⅳ) = O active species and further mineralization indicated by total organic carbon . The catalytic system exhibited highly efficient, stable, recyclable catalytic performance under mild conditions and did not cause secondary pollution to the environment. This study of a simulated enzyme catalytic system offers important insight into sewage treatment .
研究领域:
环境科学
·
生物化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2017
·Vol. 24
·期 29
·23219-23225
·
IF 2.741
Wang Lu,Ji Yuefei,Lu Junhe,Kong Deyang,Yin Xiaoming,Zhou Quansuo
The objective of this research was to compare the transformation of Br − and formation of brominated byproducts in UV/persulfate (PS) and UV/H 2 O 2 processes. It was revealed that Br − was efficiently transformed to free bromine which reacted with humic acid (HA) or dihydroxybenzoic acid resulting in the formation of brominated byproducts such as bromoacetic acids (BAAs) in UV/PS system. In contrast, no free bromine and brominated byproducts could be detected in UV/H 2 O 2 system, although the oxidization of Br − was evident. We presumed that the oxidation of Br − by hydroxyl radicals led to the formation of bromine radicals. However, the bromine radical species could be immediately reduced back to Br − by H 2 O 2 before coupling to each other to form free bromine, which explains the undetection of free bromine and BAAs in UV/H 2 O 2 . In addition to free bromine, we found that the phenolic functionalities in HA molecules, which served as the principal reactive sites for free chlorine attack, could be in situ generated when HA was exposed to free radicals. This study demonstrates that UV/H 2 O 2 is more suitable than UV/PS for the treatment of environmental matrices containing Br − .
Graphical abstract
研究领域:
环境科学
·
水处理工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2016
·Vol. 22
·期 49
·17857-17865
·
IF 5.771
Xiaolin Wang,Qiao Yang,Yixue Cao,Haibin Hao,Junhan Zhou,Jingcheng Hao
Graphical From gels to catalysts : Ionogels formed by metallosurfactants with different counterions in imidazolium ionic liquids and protic ethylammonium nitrate are discussed. The microstructures of the ionogels are lamellar phases and characterization results indicate that the characteristics of imidazolium ionic liquids have great effects on the ionogel properties. The ionogels were employed as precursors to prepare CeO 2 nanoparticles, which exhibited good catalase mimetic activity (see figure). The gelation behavior of cationic surfactants with different counterions, Br − , [FeCl 3 Br] − , and [CeCl 3 Br] − , in imidazolium ionic liquids (ILs) and protic ethylammonium nitrate was investigated. Small-angle X-ray scattering measurements and freeze-fracture transmission electron microscopy observations revealed the lamellar phases of metallosurfactant ionogels. The characteristics of imidazolium ILs, including the size and type, have effects on metallosurfactant ionogel properties, such as transformation temperatures, interlayer spacing, and mechanical strength. Cubic fluorite structured cerium oxide nanoparticles (CeO 2 NPs) were produced by using metallosurfactant ionogels as precursors. Cubic fluorite CeO 2 exhibited good catalase mimetic activity toward H 2 O 2 to generate O 2 , providing more multiple mimetic enzyme activities of CeO 2 NPs for H 2 O 2 .
研究领域:
材料科学
·
催化化学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PLoS One
·
2016
·Vol. 11
·期 10
·e0164657
·
IF 3.057
Zuohua Li,Yanhui Cui,Jun Chen,Lianlin Deng,Junwei Wu
Binary transition metal oxides have been regarded as one of the most promising candidates for high-performance electrodes in energy storage devices, since they can offer high electrochemical activity and high capacity. Rational designing nanosized metal oxide/carbon composite architectures has been proven to be an effective way to improve the electrochemical performance. In this work, the (Co,Mn) 3 O 4 spinel was synthesized and anchored on reduced graphene oxide (rGO) nanosheets using a facile and single hydrothermal step with H 2 O 2 as additive, no further additional calcination required. Analysis showed that this method gives a mixed spinel, i.e. (Co,Mn) 3 O 4 , having 2 + and 3 + Co and Mn ions in both the octahedral and tetrahedral sites of the spinel structure, with a nanocubic morphology roughly 20 nm in size. The nanocubes are bound onto the rGO nanosheet uniformly in a single hydrothermal process, then the as-prepared (Co,Mn) 3 O 4 /rGO composite was characterized as the anode materials for Li-ion battery (LIB). It can deliver 1130.6 mAh g -1 at current density of 100 mA g -1 with 98% of coulombic efficiency after 140 cycles. At 1000 mA g -1 , the capacity can still maintain 750 mAh g -1 , demonstrating excellent rate capabilities. Therefore, the one-step process is a facile and promising method to fabricate metal oxide/rGO composite materials for energy storage applications.
研究领域:
材料科学
·
能源存储技术
✓ 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）