Energy Reports
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2023
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IF 5.2
Mayao Cheng,Linsheng Chen,Jiayi Guo
In view of the problems of nanomaterials in the field of energy storage and pollution removal, energy storage composite nanomaterials were proposed in the study, including Fe3O4 Fe3O4@C (MFC), Fe3O4@PANI, Fe3O4@C @PANI core–shell nanomaterials. The experimental design includes the preparation of electrode in energy storage, characterization of electrode materials, electrode cyclic voltammetry test, electrode charge discharge test, and the preparation of catalyst, catalyst characterization, and factors affecting the removal effect in the soil pollutant removal experiment. The preparation process of catalyst for pollution removal was given, including nano ferric oxide and Pd loaded composite. The energy storage performance analysis shows that the four Fe3O4 nanocomposites all contain Fe3O4, and the corresponding diffraction peaks appear at six positions of 30.2°, 35.5°, 43.1°, 53.8°, 57.3° and 62.9° respectively. The electrochemical test results show that Fe3O4 Fe3O4@C (MFC), Fe3O4@PANI, Fe3O4@C @PANI has high electrochemical performance basis and high capacitance. The removal effect analysis shows that the optimal value of the reaction rate constant is 2.1635, the optimal current value is 40 mA, and the optimal pH value is 3.0. The experimental results verify that the composite nano materials with FeCl3.6H2O as the iron source can be used as better capacitor materials and have excellent application prospects. At the same time, the pollution removal results show that Pd-Fe3O4 has incomparable advantages compared with other materials, and has high reliability and effectiveness.
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
ANALYTICAL CHEMISTRY
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2013
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IF 5.695
Shao-Ting Wang,Wei Huang,Wei Lu,Bi-Feng Yuan,Yu-Qi Feng
A novel TiO2-based SPE strategy was developed for eliminating normal ribonucleosides before mass spectrometry (MS) analysis of 2′-deoxynucleosides and 2′-O-modified ribonucleosides. The chromatographic research for the retention behavior of ribonucleosides and 2′-deoxynucleosides on TiO2 materials was investigated using TiO2 separation column. The results indicated a specific affinity interaction mechanism between TiO2 and cis-diol-containing ribonucleosides, and the interaction was proved effective even under a wide range of pH conditions and salt concentrations. Benefiting from these features, a TiO2-based solid phase extraction (SPE) method was developed for highly efficient elimination of RNA contamination from genomic DNA. Compared with the widely used enzymatic digestion method, the proposed TiO2-based SPE method showed much more efficiency for the removal of RNA as well as provided high recoveries for the 2′-deoxynucleosides. In addition, the sample processing time is dramatically shortened using the TiO2-based SPE method (∼5 min) compared to the traditional enzymatic digestion method (∼12 h). Finally, the purification of 2′-O-methylated ribonucleosides from RNA was successfully achieved in HeLa cells by the TiO2-based SPE method, which provided a proof-of-concept for the purification of relevant modified ribonucleosides from bulky normal ribonucleosides. Taken together, this strategy developed in the current study offers a promising option to purify 2′-deoxynucleosides/2′-O-modified ribonucleosides for their sensitive and accurate determination by eliminating normal ribonucleosides in biological samples.
研究领域:
分析化学
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生物化学
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
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IF 22.1
Xi Li,Shiwen Wang,Pei Chen,Baokang Xu,Xiao Zhang,Yanhua Xu,Ru Zhou,Yang Yu,Huaili Zheng,Peng Yu,Yongjun Sun
Co–Zn–N–C catalyst (MCZC) with neighboring Co and Zn pairs anchored on hollow carbon nitride was constructed by the direct etching of zeolitic imidazolate frameworks assembled with Co and Zn. Adequate characterizations and density functional theory (DFT) studies confirmed the successful construction of non-bonding Co and Zn pairs with enhanced electron transfer on Co sites by adjacent Zn sites. Based on the synergy of adjacent Co and Zn atom pairs, the MCZC/Perxymosulfate (PMS) system achieved 99.6% Tetracycline (TC) degradation in 24 min with a mineralization rate of 55.8% and PMS decomposition efficiency of 73.1%. DFT calculation based on the Fukui index identified the sites susceptible to attack by the active species. TC degradation pathways could be inferred, and reduced toxicity of intermediates was observed. This work provides new insights into the design of MOF-derived bimetallic catalysts and the importance of the interaction between adjacent metal active sites to catalytic performance.
研究领域:
环境科学
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催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
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2023
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IF 8.9
Shuting Pan,Rui You,Xian Chen,Wenwei Pan,Quanning Li,Xuejiao Chen,Wei Pang,Xuexin Duan
Diffusion limitations and nonspecific surface absorption are great challenges for developing micro-/nanoscale affinity biosensors. There are very limited approaches that can solve these issues at the same time. Here, an acoustic streaming approach enabled by a gigahertz (GHz) resonator is presented to promote mass transfer of analytes through the jet mode and biofouling removal through the shear mode, which can be switched by tuning the deviation angle, α, between the resonator and the sensor. Simulations show that the jet mode (α ≤ 0) drives the analytes in the fluid toward the sensing surface, overcomes the diffusion limitation, and enhances the binding; while the shear mode (0 < α < π/4) provides a scouring action to remove the biofouling from the sensor. Experimental studies were performed by integrating this GHz resonator with optoelectronic sensing systems, where a 34-fold enhancement for the initial binding rate was obtained. Featuring high efficiency, controllability, and versatility, we believe that this GHz acoustic streaming approach holds promise for many kinds of biosensing systems as well as lab-on-chip systems.
研究领域:
生物技术
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纳米技术
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微流控
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生物传感
✓ 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）