Advanced Materials Research Vols. 433-440

Abstract: Subscript text TiO₂ film was deposited on glass substrate by a sol-gel process. The influences of the SiO₂ layer, distance between lamp and solution, and air flow rate were investigated. Methyl orange can be hardly degraded under UV light exposure alone. The adsorption rate of methyl orange on TiO₂ film is negative after 25 min of stirring. Although distance between the lamp and the solution varies from 5.5 cm to 7.5 cm, the degradation rates decline slightly. There is nearly no influence of air flow rate on the entire degradation ability of the photocatalyst. SiO₂ film coated on microscope glass slide has no photocatalytic activity under UV irradiation. In prior to deposit TiO₂ film onto the surface of the glass substrate, a SiO₂ thin layer is coated. The results indicate that the TiO₂ film with SiO₂ layer has much better photocatalytic activity that the film without SiO₂ layer.

Abstract: Pd/FeVO₄ composite photocatalysts were synthesized by the impregnation method.The as-prepared samples were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM).And the obtained samples were characterized by XRD, SEM and BET. The effect of Pd-loaded contents on their photocatalytic activity was studied by photocatalytic oxidation of methyl orange under 20 W UV light irradiation. The mechanism was also analysised. The results show that PdO can remarkably affect the photocatalytic activity.The photocatalyty activity of Pd-loaded FeVO₄ was significantly enhanced and the decolorization rate of MO can be increased 27% more than that of pure FeVO₄ sample when loading content is 3.5wt %.

Abstract: Any company wishing to implement a Lean approach is faced with the following issue: should Lean be implemented sequentially or simultaneously No consensus on the method for implementing Lean has been established. For this reason we sought to find out if there was an implementation order regarding Lean practices. 25 Lean experts were interviewed. We used a precedence method to identify the potential precedence for implementing certain Lean practices. We considered only the common responses from over 50% of Lean experts interviewed. We showed that five precedence levels could exist. Understanding these levels should contribute to the creation of a deployment standard for Lean, as well as the successful implementation of Lean practices in companies.

Abstract: In this paper, a delamination growth analysis on composite panel containing embedded delamination has been performed using a three-dimensional finite element model. The effects of the delamination on the local buckling load and delamination growth are studied by using Hashin’s 3D failure criteria via UMAT user’s subroutine of ABAQUS FE program. A new proposed model shows enhancement of the accuracy of the results which showed a good agreement with available experimental data.

Abstract: This paper aims to review the available studies that have been done concerning PM₁₀ and PM_2.5 concentrations in nurseries and primary schools since 2008, to provide a summary of the available scientific findings concerning the concentrations, indoor/outdoor (I/O) ratios and the sources. Levels of PM observed worldwide exceeded several times national legislations and WHO guidelines, especially in developing countries. I/O ratios were several times higher than 1 and high PM levels were reported as due mainly constant re-suspension of particles.

Abstract: After the invention of mesoporous, the chiral mesoporous materials had been regarded a hot research issue. Inspired by the chiral phenomenon, in this investigation, we presented several aspect of chiral mesoporous from its first appearance, especially stated the template that could be used to prepare chiral mesoporous, including chiral template and achiral template, besides, the different mechanism of some distinguished scientists’ works were introduced, and some application of these material were introduced such as catalyst, HPLC stationary phases and many other fields.

Abstract: Kaolinite/polyacrylic acid composite was synthesized by using inverse suspend polymerization method, and the surface morphology, structure and humidity controlling behaviors of kaolinite/polyacrylic acid composite under different kaolinite content, neutralization degree and crosslinker concentration were analyzed and determined. The results show that kaolinite/ polyacrylic acid composite has a loose and porous surface. With the increasing of kaolinite content in composite, the humidity absorption and desorption ratio under the balance of reduction of moisture absorption component and raising of surface porosity increases firstly and then decreases. The humidity controlling behaviors of composite also rise initially with the increasing of neutralization degree and crosslinker concentration, and then drop down. The optimum preparation parameters are kaolinite content of 10%, neutralization degree of 80% and crosslinker concentration of 0.10%.

Abstract: It used to be held that fracturing sand control construction would severely affect the strength and duration of casing in deep well. Based on 5 inch and 7inch casings, the article intends to conduct modeling and analysis, by means of the finite element method, of a multi-tube model of casing of different steel grades and a combination of different perforation parameters, under different environmental conditions (different internal and external pressure). The results show that under the same perforation parameters, the equivalent stress within the casing increases with the external pressure and the changes linearly. Equivalent stress within the casing decreases drastically with the increase of internal pressure. When the internal pressure is greater than the external pressure, the equivalent stress of the casing tends to slow down. Stress condition in the casing perforation improves when internal pressure is applied in the casing. The result shows that fracturing sand control construction improves the stress condition of the casing rather than affect the strength and duration of casing.

Abstract: Porous TiO₂ film was prepared by a sol-gel method using PEG1000 as pore forming template. The porous film and normal film were used as electrodes in a photoelectrocatalytic reactor. The functions of applied potential and concentration of NaH₂PO₄ to the photoelectrocatalytic degradation process of methyl orange were investigated. The results show that methyl orange cannot be degraded solely by the applied potential. Under the applied potential of 2 V, 49.9% of the initial dye can be removed on the normal TiO₂ film electrode, which is much better than the 31.1% removal rate on the porous TiO₂ film electrode. The normal TiO₂ film electrode has better performance than the porous TiO₂ film in the whole NaH₂PO₄ concentration range. After 80 min of reaction, degradation rate is 93.7% on the normal TiO₂ film electrode. After 100 min of reaction, degradation rate is 89.7% on the porous TiO₂ film electrode.

Abstract: Rotation direction of single-axis rotation SINS is researched in this paper. The two aspects: one-way, positive and negative rotation and clockwise, counterclockwise rotation are deeply analyzed respectively, and experimental verification is also taken. The results show that: FOG-based single-axis SINS should rotate with the positive and negative rotation way. It has a significant meaning to the engineering application of this technology.