A5057201844- Analytical Chemistry and Sensors
- Electrochemical sensors and biosensors
- Catalysis and Oxidation Reactions
- Electrochemical Analysis and Applications
- Catalytic Processes in Materials Science
- Metal complexes synthesis and properties
- Conducting polymers and applications
- Zeolite Catalysis and Synthesis
- Gas Sensing Nanomaterials and Sensors
- Metal-Organic Frameworks: Synthesis and Applications
- Synthesis and Characterization of Heterocyclic Compounds
- Synthesis and biological activity
- Crystal structures of chemical compounds
- Crystallization and Solubility Studies
- Spectroscopy and Quantum Chemical Studies
- Phase Equilibria and Thermodynamics
- Chemical and Physical Properties in Aqueous Solutions
- Analytical Chemistry and Chromatography
- Carbon Dioxide Capture Technologies
- Magnetism in coordination complexes
- Enhanced Oil Recovery Techniques
- Industrial Gas Emission Control
- Hydraulic Fracturing and Reservoir Analysis
- Phytoestrogen effects and research
- Fuel Cells and Related Materials
University of Minnesota
2016-2024
Henan University of Science and Technology
2023
Fudan University
2021
University of Alberta
2019
Anhui University of Technology
2016-2018
University of Science and Technology Beijing
2018
Tsinghua University
2015-2018
Sinopec (China)
2014-2017
Purdue University West Lafayette
2014-2015
GlaxoSmithKline (United States)
2015
We develop an N-coordination strategy to design a robust CO2 reduction reaction (CO2RR) electrocatalyst with atomically dispersed Co-N5 site anchored on polymer-derived hollow N-doped porous carbon spheres. Our catalyst exhibits high selectivity for CO2RR CO Faradaic efficiency (FECO) above 90% over wide potential range from -0.57 -0.88 V (the FECO exceeded 99% at -0.73 and -0.79 V). The current density remained nearly unchanged after electrolyzing 10 h, revealing remarkable stability....
The Cu/N-ligand/TEMPO catalytic system was first applied to the aerobic oxidative synthesis of heterocycles. As demonstrated, 2-substituted quinazolines and 4H-3,1-benzoxazines were synthesized efficiently from one-pot reaction aldehydes with 2-aminobenzylamines 2-aminobenzyl alcohols, respectively, by employing CuCl/DABCO/4-HO-TEMPO as catalysts oxygen terminal oxidant.
We have exploited the unique ability of vibrational sum frequency spectroscopy (VSFS) to investigate interfacial urea molecules at protein surfaces. Experiments were carried out bovine serum albumin/water interface. The absolute orientation could be followed directly by VSFS. It was found that orients with its NH groups pointing toward high pH, where is negatively charged. flips low positively This behavior resembles water. direct interactions between and proteins should electrostatic in...
Three new 2D complexes were constructed by reaction of Co(NO3)2·6H2O with 4,4′-((5-carboxy-1,3-phenylene)bis(oxy))dibenzoic acid (H3cpbda) in three different solvents (N,N′-dimethylformamide (DMF), N,N′-dimethylacetamide (DMA), and N-methylpyrrolidinone (DMP)), formulated as {[Co1.5(cpbda)(DMF)(H2O)3]·(DMF)}n (1), {[Co1.5(cpbda)(DMA)(H2O)3]·(DMA)}n (2), {[Co1.5(cpbda)(DMP)(H2O)3]·(DMP)}n (3). Complexes characterized X-ray single-crystal diffraction, elemental analysis (EA), powder x-ray...
A process for simultaneous desulfurization and denitrification was proposed, which made up of ozone as the oxidizing agent NO ammonia solution absorbent. The results showed that presence SO2 concentration changes have little impact on oxidation NO, efficiency can achieve over 90% when molar ratio O3/NO is 1.0. NOx had effects absorption SO2, an appropriate increase favorable to absorption. removal reached 99.34% 90.01% at pH 10, flow rate 0.95 Nm3/h, n[O3]/n[NO] 1.0, initial 2000 mg/Nm3, 200...
This work presents a new method of catalyst surface modification by using oxygen plasma to change the oxidation state active sites in metal oxide catalysts.
Because of their low polarity and polarizability, fluorous sensing membranes are both hydrophobic lipophobic exhibit very high ion selectivities. Here, we report on a new fluorous-membrane ion-selective electrode (ISE) with wide range centered around physiologically relevant pH values. The fluorophilic tris[perfluoro(octyl)butyl]amine (N[(CH2)4Rf8]3) was synthesized tested as H+ ionophore using redesigned body that provides excellent mechanical sealing much improved measurement reliability....
With a view to improving the sensor lifetime, solid-contact ion-selective electrodes (ISEs) were prepared with plasticizer-free and cross-linked poly(decyl methacrylate) matrix, which only ionic sites, ionophore, or both sites ionophore covalently attached. In earlier work attached ionophores it was difficult discount presence of site impurities that not polymer backbone because reagents used introduce had high hydrophobicities. this work, we deliberately chose readily available hydrophilic...
Many reference electrodes with an ionic liquid-doped membrane contain a plasticizer that can gradually leach out into the sample. However, because many common plasticizers are known to be endocrine disruptors and may induce inflammatory reactions, they preferably avoided for wearable or implantable sensors. Therefore, this work tested polymeric electrode membranes prepared by solvent casting from seven commercially available biocompatible silicones widely used in devices. Only consisting of...
The selectivities of ionophore-doped ion-selective electrode (ISE) membranes are controlled by the stability and stoichiometry complexes between ionophore, L, target interfering ions (Izi Jzj, respectively). Well-accepted models predict how these can be optimized selection ideal ionophore-to-ionic site ratios, considering complex stoichiometries ion charges. These were developed for systems in which each form only one stoichiometry. However, a few ISEs, concurrent presence two primary...
Solid-contact ion-selective electrodes (SC-ISEs) in direct long-term contact with physiological samples must be biocompatible and resistant to biofouling, but most wearable SC-ISEs proposed date contain plasticized poly(vinyl chloride) (PVC) membranes, which have poor biocompatibility. Silicones are a promising alternative PVC because of their excellent biocompatibility, little work has been done study the relationship between silicone composition ISE performance. To address this, we...
Abstract A series of guanidinium chloride derivatives have been synthesized by condensation 1,3-diaminoguanidine monohydrochloride with heteroaromatic formaldehydes in good yields. All compounds were characterized nuclear magnetic resonances and infrared spectroscopies, the molecular structures four determined single crystal X-ray diffraction. The optical properties these fluoride anions investigated, showing selective color changes from colorless to yellow or orange, red-shifted...
In situ methods for the sequestration of perfluorooctyl-1-sulfonate (PFOS) that are based on PFOS binding to polyquaternium polymers were reported previously, providing an approach immobilize and concentrate in situ. To apply these real life, concentrations permit efficient must be determined. This is only possible if stoichiometry strength known. Here, we report use fluorous-phase ion-selective electrodes (ISEs) determine equilibrium constants characterizing...
Abstract Tight sands are abundant in nanopores leading to a high capillary pressure and normally low fluid injectivity. As such, spontaneous imbibition might be an effective mechanism for improving oil recovery from tight after fracturing. The chemical agents added the injected water can alter interfacial properties, which could help further enhance by imbibition. This study explores possibility of using novel chemicals via We experimentally examine effects more than ten different on...
The acid structures on both tetragonal and monoclinic sulfated zirconia were studied successfully proposed through experimental theoretical approaches.
Abstract Asphaltenes are of particular interest to the petroleum industry because their depositional effect which creates problems for production, storage, transportation and refinery processes. A class non-ionic polymeric surfactants has been developed prevent aggregation asphaltene colloids in crude oils. surfactant dosage rate as low 25 ppm can be used keep asphaltenes dispersed at nearly 100 %. These made from sustainable biodegradable raw materials free BTEX, other aromatic solvents...
Potentiometric selectivities show that in fluorous ion-selective electrode membranes the tetrabutylammonium ion binds to fluorophilic proton ionophores. For ionophore bis[3-(perfluorooctyl)propyl](2,2,2-trifluoroethyl)amine, this type of interaction is confirmed by effect on ionic conductivity perfluoro(perhydrophenanthrene) solutions a NBu4+ salt. In system, pairs, triple ions, and higher aggregates dominate over single increases favoring formation with net charge. These observations are...