Abstract A highly efficient and stable hydrotalcite-derived Cu-MgAlO catalyst was developed for t... more Abstract A highly efficient and stable hydrotalcite-derived Cu-MgAlO catalyst was developed for the partial oxidation of cyclohexane with molecular oxygen. The physical-chemical properties of Cu-MgAlO catalysts were studied, and the results indicated that the copper component had been successfully introduced into the hydrotalcite unit layer structure. The catalytic reaction results showed that copper as the active species could activate C-H bond and effectively promote the decomposition of cyclohexyl hydroperoxide (CHHP) to KA oil. 8.3% of cyclohexane conversion and 82.9% of selectivity for KA oil were obtained over 9%Cu-MgAlO catalyst at 150 °C with 0.6 MPa of oxygen pressure for 2 h. Especially, its catalytic performance was still stable after five runs.
Asia Communications and Photonics Conference, 2017
We fabricated and characterized a high quality factor of 16,500 micro-ring resonator on Lithium N... more We fabricated and characterized a high quality factor of 16,500 micro-ring resonator on Lithium Niobate thin film with a radius of 80 μm using standard E-beam lithography and optimized Argon-based dry etch process.
We design and demonstrate a silicon and LN hybridly integrated Mach-Zehnder interferometer modula... more We design and demonstrate a silicon and LN hybridly integrated Mach-Zehnder interferometer modulators. The fabricated devices show a half-wave electro-optic modulation efficiency of 2.25V.cm and data rates up to 5Gbps.
Microfluidic solvent extraction of zinc from sulfate solution was studied using di-2-ethyl hexyl ... more Microfluidic solvent extraction of zinc from sulfate solution was studied using di-2-ethyl hexyl phosphoric acid, D2EHPA, in sulfonated kerosene as diluent. The influence of different parameters on the extraction of zinc, such as flow rate, temperature, flow rate ratio, extraction concentration, and saponification ratio of extractant were investigated and the conventional and microfluidic extraction were compared. Under the optimized conditions, microfluidic extraction efficiency of zinc is up to 97.1%. It is better than that conventional extraction. Therefore, microfluidic solvent extraction can achieve high efficiency and low consumption of extraction process.
Lignocellulosic biomass is the most abundant renewable carbon resource on earth, for which many e... more Lignocellulosic biomass is the most abundant renewable carbon resource on earth, for which many efforts have been made to convert it using various chemocatalytic processes. Heterogeneously chemocatalytic conversion conducted based on reusable solid catalysts is the process with the greatest potential studied presently. This review provides insights into the representative achievements in the research area of heterogeneous chemical catalysis technologies for the production of value-added chemicals from lignocellulosic polysaccharides (cellulose and hemicellulose). Popular approaches for the conversion of lignocellulosic polysaccharides into chemicals, including hydrolyzation (glucose, xylose and arabinose), dehydration (5-hydroxymethylfurfuran, furfural and levulinic acid), hydrogenation/hydrogenolysis (sorbitol, mannitol, xylitol, 1,2-propylene glycol, ethlyene glycol and ethanol), selective oxidation (gluconic acid and lactic acid), have been comprehensively reviewed. However, tech...
Background: Tibial plateau fracture is one of the common intra-articular fractures in clinic. And... more Background: Tibial plateau fracture is one of the common intra-articular fractures in clinic. And its accurate classification and treatment is a difficult problem for orthopedic surgeons. Our research aims to investigate the application value of 3D printing in the classification and preoperative planning of complex tibial plateau fractures.Methods: 28 cases of complex tibial plateau fractures diagnosed and treated in our hospital from January, 2017 to January, 2019.01 were analyzed. Preoperative spiral CT scan was performed and then DICOM data were input into the computer. We use Mimics to process data. And 3D printing technology was applied to print the 3D model of fracture (1:1). Combined with the 3D printed model, the tibial plateau fractures were subdivided into seven types according to the geometric plane of the tibial plateau. The surgical approach was determined on the 3D printed model. And then simulated operations such as accurate reduction of fracture and selection of plat...
The coherent transmission technology using digital signal processing and advanced modulation form... more The coherent transmission technology using digital signal processing and advanced modulation formats, is bringing networks closer to the theoretical capacity limit of optical fibres, the Shannon limit. The in-phase/quadrature electro-optic modulator that encodes information on both the amplitude and the phase of light, is one of the underpinning devices for the coherent transmission technology. Ideally, such modulator should feature a low loss, low drive voltage, large bandwidth, low chirp and compact footprint. However, these requirements have been only met on separate occasions. Here, we demonstrate integrated thin-film lithium niobate in-phase/quadrature modulators that fulfil these requirements simultaneously. The presented devices exhibit greatly improved overall performance (half-wave voltage, bandwidth and optical loss) over traditional lithium niobate counterparts, and support modulation data rate up to 320 Gbit s−1. Our devices pave new routes for future high-speed, energy-...
Abstract Highly dispersed Co/SBA-15 mesoporous materials as an efficient and stable catalyst for ... more Abstract Highly dispersed Co/SBA-15 mesoporous materials as an efficient and stable catalyst for partial oxidation of cyclohexane has been studied in present work. The physico-chemical properties of Co/SBA-15 catalysts were systematically characterized by XRD, XPS, H2-TPR, UV–vis DRS, FT-IR, BET, SEM and TEM-EDX. The characterization results indicated that the nanoscale cobalt oxide particles were highly dispersed on SBA-15 support surface, and part of cobalt ions were incorporated into the silica framework to formed very stable structure. For partial oxidation of cyclohexane with molecular oxygen, Co/SBA-15 displayed a good catalytic performance for 9.6% of cyclohexane conversion and 81.1% of selectivity toward KA oil among the Co-containing molecular sieves catalysts, and it also showed highly stability and reusability in this oxidation reaction. The influences of reaction parameters such as initial oxygen pressure, reaction temperature, catalyst dosage and reaction time on the cyclohexane oxidation with Co/SBA-15 as catalys were also investigated. Maybe this work employing Co/SBA-15 as highly efficient and stable catalyst for the preparation of KA oil from cyclohexane has potential industrial application prospects.
Abstract A highly efficient and stable hydrotalcite-derived Cu-MgAlO catalyst was developed for t... more Abstract A highly efficient and stable hydrotalcite-derived Cu-MgAlO catalyst was developed for the partial oxidation of cyclohexane with molecular oxygen. The physical-chemical properties of Cu-MgAlO catalysts were studied, and the results indicated that the copper component had been successfully introduced into the hydrotalcite unit layer structure. The catalytic reaction results showed that copper as the active species could activate C-H bond and effectively promote the decomposition of cyclohexyl hydroperoxide (CHHP) to KA oil. 8.3% of cyclohexane conversion and 82.9% of selectivity for KA oil were obtained over 9%Cu-MgAlO catalyst at 150 °C with 0.6 MPa of oxygen pressure for 2 h. Especially, its catalytic performance was still stable after five runs.
Asia Communications and Photonics Conference, 2017
We fabricated and characterized a high quality factor of 16,500 micro-ring resonator on Lithium N... more We fabricated and characterized a high quality factor of 16,500 micro-ring resonator on Lithium Niobate thin film with a radius of 80 μm using standard E-beam lithography and optimized Argon-based dry etch process.
We design and demonstrate a silicon and LN hybridly integrated Mach-Zehnder interferometer modula... more We design and demonstrate a silicon and LN hybridly integrated Mach-Zehnder interferometer modulators. The fabricated devices show a half-wave electro-optic modulation efficiency of 2.25V.cm and data rates up to 5Gbps.
Microfluidic solvent extraction of zinc from sulfate solution was studied using di-2-ethyl hexyl ... more Microfluidic solvent extraction of zinc from sulfate solution was studied using di-2-ethyl hexyl phosphoric acid, D2EHPA, in sulfonated kerosene as diluent. The influence of different parameters on the extraction of zinc, such as flow rate, temperature, flow rate ratio, extraction concentration, and saponification ratio of extractant were investigated and the conventional and microfluidic extraction were compared. Under the optimized conditions, microfluidic extraction efficiency of zinc is up to 97.1%. It is better than that conventional extraction. Therefore, microfluidic solvent extraction can achieve high efficiency and low consumption of extraction process.
Lignocellulosic biomass is the most abundant renewable carbon resource on earth, for which many e... more Lignocellulosic biomass is the most abundant renewable carbon resource on earth, for which many efforts have been made to convert it using various chemocatalytic processes. Heterogeneously chemocatalytic conversion conducted based on reusable solid catalysts is the process with the greatest potential studied presently. This review provides insights into the representative achievements in the research area of heterogeneous chemical catalysis technologies for the production of value-added chemicals from lignocellulosic polysaccharides (cellulose and hemicellulose). Popular approaches for the conversion of lignocellulosic polysaccharides into chemicals, including hydrolyzation (glucose, xylose and arabinose), dehydration (5-hydroxymethylfurfuran, furfural and levulinic acid), hydrogenation/hydrogenolysis (sorbitol, mannitol, xylitol, 1,2-propylene glycol, ethlyene glycol and ethanol), selective oxidation (gluconic acid and lactic acid), have been comprehensively reviewed. However, tech...
Background: Tibial plateau fracture is one of the common intra-articular fractures in clinic. And... more Background: Tibial plateau fracture is one of the common intra-articular fractures in clinic. And its accurate classification and treatment is a difficult problem for orthopedic surgeons. Our research aims to investigate the application value of 3D printing in the classification and preoperative planning of complex tibial plateau fractures.Methods: 28 cases of complex tibial plateau fractures diagnosed and treated in our hospital from January, 2017 to January, 2019.01 were analyzed. Preoperative spiral CT scan was performed and then DICOM data were input into the computer. We use Mimics to process data. And 3D printing technology was applied to print the 3D model of fracture (1:1). Combined with the 3D printed model, the tibial plateau fractures were subdivided into seven types according to the geometric plane of the tibial plateau. The surgical approach was determined on the 3D printed model. And then simulated operations such as accurate reduction of fracture and selection of plat...
The coherent transmission technology using digital signal processing and advanced modulation form... more The coherent transmission technology using digital signal processing and advanced modulation formats, is bringing networks closer to the theoretical capacity limit of optical fibres, the Shannon limit. The in-phase/quadrature electro-optic modulator that encodes information on both the amplitude and the phase of light, is one of the underpinning devices for the coherent transmission technology. Ideally, such modulator should feature a low loss, low drive voltage, large bandwidth, low chirp and compact footprint. However, these requirements have been only met on separate occasions. Here, we demonstrate integrated thin-film lithium niobate in-phase/quadrature modulators that fulfil these requirements simultaneously. The presented devices exhibit greatly improved overall performance (half-wave voltage, bandwidth and optical loss) over traditional lithium niobate counterparts, and support modulation data rate up to 320 Gbit s−1. Our devices pave new routes for future high-speed, energy-...
Abstract Highly dispersed Co/SBA-15 mesoporous materials as an efficient and stable catalyst for ... more Abstract Highly dispersed Co/SBA-15 mesoporous materials as an efficient and stable catalyst for partial oxidation of cyclohexane has been studied in present work. The physico-chemical properties of Co/SBA-15 catalysts were systematically characterized by XRD, XPS, H2-TPR, UV–vis DRS, FT-IR, BET, SEM and TEM-EDX. The characterization results indicated that the nanoscale cobalt oxide particles were highly dispersed on SBA-15 support surface, and part of cobalt ions were incorporated into the silica framework to formed very stable structure. For partial oxidation of cyclohexane with molecular oxygen, Co/SBA-15 displayed a good catalytic performance for 9.6% of cyclohexane conversion and 81.1% of selectivity toward KA oil among the Co-containing molecular sieves catalysts, and it also showed highly stability and reusability in this oxidation reaction. The influences of reaction parameters such as initial oxygen pressure, reaction temperature, catalyst dosage and reaction time on the cyclohexane oxidation with Co/SBA-15 as catalys were also investigated. Maybe this work employing Co/SBA-15 as highly efficient and stable catalyst for the preparation of KA oil from cyclohexane has potential industrial application prospects.
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