Advanced Materials Research Vols. 641-642

Abstract: The nanoporous titania powders are prepared under hydrothermal conditions using the amphiphilic triblock copolymer (Pluronic P123) as the porogent, and characterized by means of XRD and BET. Then, nanoporous TiO2 electrodes are fabricated by Doctor-blade mehod, using the nanoporous TiO2 powders as anode materials, and the photoelectronic properties of the DSCs are investigated by measuring transient photocurrent spectrum and photocurrent action spectra. The results indicate that the porous titania powder have pure anatase structure, and the specific surface area is up to 68m2g-1. In addition, the nanoporous TiO2 electrode shows higher photoelectric performance compared with pure TiO2 electrode.

Abstract: Un-doped and (Cu, Al)-doped ZnO thin films were prepared by sol-gel spin coating technique on glass substrate. The effect of(Cu, Al)incorporation on the structural, morphological and optical properties of the Zinc oxide (ZnO)film was investigated by means of X-ray diffraction, scanning electron microscopy and UV-vis spectrophotometer. It has been found that the grain sizes, Optical band gap and the preferred orientation growth of (002) plane were decreased with increasing of (Cu, Al) dopants amount in ZnO films.

Abstract: TiO₂, 50%TiO₂-ZrO₂ and 80%TiO₂-ZrO₂ were prepared by sol-gel method. The manganese oxides were impregnated on the carrier and the catalysts were used for low-temperature selective catalytic reduction of NOx with ammonia (NH₃-SCR) in the presence of excess O₂. The samples were characterized by X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM). The results showed that the particle size of 80%TiO₂-ZrO₂ is the smallest among the three kind of carrier and the particles are highly dispersed. By adding the ZrO₂, the Zr⁴⁺ ions replaced the lattice Ti⁴⁺ ions, and thus caused lattice distortion in the TiO₂ and an increase of the active point amount on the carrier. Furthermore, the Zr also promoted the dispersion of the active ingredients carried on the carrier, increased the surface concentration of Mn. The most active catalyst was obtained with a mass MnOx/80%TiO₂-ZrO₂ ratio of 0.1.The best MnOx/80%TiO₂-ZrO₂ catalyst yielded nearly 92.6% NO conversion at 130°C at a high space velocity of 67,000 h^-1.

Abstract: SiJiaYing's iron ore is fine grain hematite and gangue mineral is quartz,chlorite,black mica and parts of clay mineral.Grinding process is tend to argillation,which seriously impact the subsequent strong magnetic and flotation thick operation.This paper mainly conduct ball mill sphere diameter,ball ratio and the grinding effect factor test,which including medium filling ratio,grinding concentration and so on.By compared experiments optimize,grinding process and improve the grinding effect.

Abstract: A novel composite was firstly synthesized by compositing graphenes (G) and carbon nanotubes (CNTs) and then a new composite modified electrode (G/CNTs/GCE) was prepared by coating the resulting composite on the surface of the glassy carbon electrode (GCE). The composite modified electrode G/CNTs/GCE showed great electrochemical activities which were studied by sensitive determining the electrochemistry behaviors of uric acid (UA). It revealed when the concentration range of UA changed from 1×10^-7 mol/L to 1×10^-3 mol/L, the peak currents had linear relationship with the concentration of UA in the phosphate buffer solution (PBS) which the value of pH is 7.0. And the linear equation is ip (μA) = 21.55C+28.94 (C: mmol/L), with the related coefficient 0.9964.

Abstract: A novel Nafion/PMB/G/GCE was prepared by firstly electro-polymerization of MB to G/GCE and then coating Nafion on PMB/G/GCE. The as-prepared modified electrode combining the advantages of Nafion, methylene blue and G was employed for the sensitive detection of rutin. The results showed that the peak current of rutin obtained on Nafion/PMB/G/GCE was obviously high compared to bare electrode and G/GCE. Under the optimized value of pH, which was pH 3.0, peak current of rutin had good linear relation with the scan rate. At the same time, peak current increased linearly with increasing concentration of rutin. The linear range was from 5×10^-7 mol/L to 1.2×10^-5 mol/L, and the detection limit was 9.5×10^-8 mol/L

Abstract: Optical metallographic examination, scanning electron microscope as well as energy dispersive X-ray spectrometry was operated to the interfaces of titanium/steel laminates manufactured by explosive welding. According to the variation of the thickness of brittle Ti-Fe intermetallic compound at the interfaces, typical wave interfaces of titanium-steel laminates are classified as over melted wave interface, tinyly melted wave interface and optimum wave interface. Furthermore, the features of three wave interfaces are brought forward.

Abstract: In this paper, the mechanical property experiments of concrete based on the seawater and sea sand have been carried in different raw materials preparation and different conservation environments. The results show that the early strength and late strength of concrete based on seawater and sea sand are better than concrete based on freshwater and sand. There is no significant strength decreased for concrete based on seawater and sea sand under accelerated alternating wet and dry conditions. For concrete based on seawater and sea sand mixed with admixture, the downward trend of late strength is significantly delayed, the late strength of concrete based on the seawater and sea sand mixed with slag gets the most obvious growth trend, while the late strength of seawater and sea sand concrete mixed with fly ash gets the largest increment.

Abstract: In order to reveal the potentials of unknown and lessknown herbaceous wild plant (potential diesel plant) from saline-alkali wasteland for development biodiesel production, seed and plant samples from 33 species were collected and plant oil content, seed oil content, seed yield per plants and saline-alkali tolerance of the plants were analyzed. The result show that oil content in plants ranged from 1.31-15.01%. Euphorbia heyneana (15.01%) had the highest oil content followed by Ricinus communis (13.9%), Cirsium setosum (12.5%), Euphorbia nutans (11.02%), Cirsiu japonicum (9.27%). About fifty percent species were found have more seed oil content within the range of 21 to 48.5%. Maximum of 48.5% was observed in one wild species of Ricinus communis followed by Euphorbia esula (34.2%), Euphorbia nutans (29.3%), Xanthium sibiricum (28.5%), Euphorbia humifusa (28.1%), Euphorbia heyneana (24.1%), Capsella bursa-pastoris (24%), Suaeda glauca (23.6%), Artemisia argyi (23.5%), Lepidium apetalum (23%). Highest level of seed field per plant was observed in Ricinus communis, Glycine soja and the higher level of seed field was in Humulus scandens, Sonchus oleraceus, Gynura crepidioides, Artemisia argyi, Abutilon theophrasti, Cirsiu japonicum, Inula japonica, Comnyza canadensis. 14 species grew in moderate saline-alkali soil and only one species (Suaeda glauca) was in severe saline-alkali soil. Comprehensive analysis show that most potential herbaceous diesel plants are Ricinus communis, Euphorbia esula, Glycine soja, Gynura crepidioides, Cirsiu japonicum and Artemisia argyi, based on 4 values of oil content in plants, and seed, seed yield per plants and saline-alkali tolerance.

Abstract: Each operation to strengthen or repair requires special consideration and requires the use of methods, tools and techniques appropriate to the situation and specific problems of each of the constructs. The aim of this paper is to study the pathology of building of reinforced concrete towards the earthquake and the vulnerability assessment using a non-linear Pushover analysis and to develop curves for a medium capacity building in order to estimate the damaged condition of the building.