Ya Ming Wang

Effect of Different Silicon Sources on CO2 Absorption Properties of Li4SiO4 at High Temperature

Using cheap and porous diatomite or zeolite as silicon sources, we prepared firstly Li4SiO4 matetials for high temperature CO2 capture through solid-state method, and mainly investigated effects of silicon sources on the CO2 absorption properties of Li4SiO4 materials. Phase composition was analyzed by X-ray diffraction, and the CO2 absorption properties were studied by the simultaneous thermal thermogravimetric analyzer (TG-DSC). The results showed that Li4SiO4 materials using zeolite as silicon source showed little CO2 absorption properties, while Li4SiO4 materials using diatomite as silicon source showed excellent CO2 absorption properties. Compared with the existing literatures, the preparation cost of Li4SiO4 materials was lowered

The Effects of Natural Dopant Acids on Morphologies and Antibacterial Activity of Polyaniline

Polyaniline(PANI) doped by natural acid(citric acid, salicylic acid or rosin acid)solutions was synthesized using aniline as monomer and ammonium peroxydisulfate ((NH4)2S2O8) as oxidant. The antibacterial activities of the PANI against Gram positive bacteria(Bacillus megatherium, Bacillus subtilis, Bacillus cereus and Staphylo-coccus aureus) and Gram negative bacteria(Bacillus coli) were investigated. It was shown that PANI doped by citric acid possessed the better antibacterial activity against the selected species of Gram positive bacteria and Gram negative bacteria than PANI doped by rosin acid. PANI doped by salicylic acid exhibited ascendant antibacterial activities against Gram positive bacteria, but it has little antibacterial activity against the Gram negative bacteria.

Prepared for Potassium Sulfate of the Orthogonal Test in K-Feldspar-Phosphogypsum-Coke System

The four factors such as alcium silicon proportion, coke dosage, burned time and the addition of solubilizer are studied in poorer oxidative atmosphere at 1200 °C. The grade-analysis and visual preferred plan of orthogonal table are reappeared.The results show the indexs of visual preferred plan of orthogonal table are perfecter,therefore,the plan is used as preferred plan.The product is separated and characterized by infrared.The infrared map shows the product is potassium sulfate . The XRD inflection of samples is studied, waste residue is also effective ingredient besides potassium slufate.It is used again to avoid secondary pollution.

Process on Inorganic Nanomaterial Synthesis by Microwave-Hydrothermal Methods

The microwave-hydrothermal method is one of the methods preparing inorganic material. In this paper, the synthesis principle and application of microwave–hydrothermal technology in preparing nano-material were summarized. The application prospect of synthesizing inorganic material by microwave- hydrothermal method was prospected. The microwave- hydrothermal technology plays an important role in accelerating and optimizing the crystallization and nuclear of inorganic nano-material, which will provide a new way for inorganic material synthesis.

Microwave-Hydrothermal Synthesis and Characterization of Graphene

Graphene was synthesized by microwave-hydrothermal chemical reduction of graphite oxide using hydrazine hydrate as the reducing agent. Graphene was characterized using X-ray diffraction, UV-visible spectrum, FT-IR spectrum and scanning electron microscopy. Results indicated that the as-prepared graphene was wrinkled and comprised fewer graphenes with a highly crystalline structure.

Synthesis of FeC2O4-Graphene Composites and their Application in Removal Dyes

A well-organized composite of graphene nanosheets decorated with FeC2O4 particles was synthesized through a simple chemical precipitation method. The FeC2O4 nanoparticles obtained were 100-150 nm in size and homogeneously anchored on graphene sheets as spacers to keep the neighboring sheets separated. The FeC2O4-graphene exhbited excellent performances in absorption propties and supercapacitor make potential uses as environment and energy storage materials in future.

A Effects of Polyaniline Morphologies on Performance for Removal Rhodamine B

Polyaniline with different morphologies doped by nitric acid were prepared using rapid mixture method. Scanning electron microscopy analysis showed that morphologies of polyaniline can be changed from unequal particles to nanowires with increasing the molar ratio of aniline to ammonium peroxydisulfate. The adsorption of rhodamine B dye was carried out using the polyaniline with different morphologies, and the effect of morphologies was studied. The results proved that adsorption of rhodamine B from aqueous solutions using polyaniline is an effective and economical method, and morphologies of polyaniline obviously affect its adsorption performance. The polyaniline nanowires present the best adsorption performance for removal rhodamine B among polyaniline with the three kinds of morphologies.

Synthesis and Properties Epoxy Resin/Mesoporous Silica-Organic Clay Nanocomposites

A novel nanofiller containing layered organo-modifed montmorillonite (oM) and mesoporous silica micro-sphere (MS) was prepared by in situ deposition method, and the microstructures and morphologies of this nanofiller were characterized by Fourier transform infrared spectrometry (FTIR) X-ray diffraction (XRD) and transmission electronic microscopy (TEM). EP/oM-MS nanocomposite was obtained by adding oM-MS to EP matrix. Morphologies and mechanical of the new ternary nanocomposite were investigated. For purpose of comparison, the corresponding binary nanocomposites, i.e., EP modified with either oM or MS, were tested as well. The test results of mechanical properties show that oM obviously improves the strength of EP and MS enhances the toughness of EP, but oM-MS exhibits synergistic effect on toughening and reinforcing of EP.

Synthesis and Properties Epoxy Resin/Mesoporous Silica-Sepiolite Nanocomposites

Size, shape and processing of the inorganic fillers are important for improving properties of nanocomposites. In this paper, a novel nanofiller containing mesoporous silica(MS) and fibrous sepiolite(SE) was prepared by in situ deposition method. EP/MS-SE nanocomposite was obtained by adding MS-SE to epoxy resin(EP) matrix. Morphologies and mechanical properties of the new ternary nanocomposite were investigated. For purpose of comparison, the corresponding binary nanocomposites, i.e., EP modified with either MS or SE, were tested as well. The test results of mechanical properties show that MS improves the strength of EP and SE obviously enhances the toughness of EP, but oM-MS exhibits synergistic effect on toughening and reinforcing of EP at the same time. Dynamic mechanical analysis revealed that the glass transition temperature and storage modulus of the EP/MS-SE nanocomposite was higher than those of pure EP.

Preparation of Fibrous CaO Sorbent by Hydrothermal Method

Using urea and calcium chloride as precipitator and calcium source, fibrous CaCO3 precursors were prepared using hydrothermal method, then fibrous CaO sorbent was obtained by calcination. The influence of hydrothermal temperature on CO2 absorption properties was discussed. X-ray diffraction analysis showed that pure CaCO3 phase with aragonite and calcite crystal forms was obtained. Scanning electron microscopy analysis showed that the resultant CaO sorbent presented a fibrous microstructure, which inherited the morphologies of CaCO3. The absorption capacity of the resultant CaO sorbent reached 59.86%, being 76% of theoretical absorption capacity. In addition, compared with the CaO sorbent from analytical pure CaCO3, the obtained fibrous CaO-sorbent have the better cyclic absorption properties.