水热法制备钒酸铋及可见光催化降解亚甲基蓝溶液研究

利用水热法制备了BiVO4粉体,并通过X射线衍射(XRD)、扫描电镜(SEM)、紫外一可见漫反射光谱(DRS)等对催化剂进行了表征。以制备的BiVO4为催化剂,考察了可见光照射下其对亚甲基蓝的降解效果。研究结果表明对初始质量浓度为10 mg/L的亚甲基蓝溶液50 mL,BiVO4加入量为0.6 g/L,经500 W氙灯(可见光)照射6 h后,亚甲基蓝的脱色率可达64%。     

MB-202在阻燃钢丝绳输送带中的应用

介绍MB－202成分及其在阻燃钢丝绳输送带中的应用。试验表明，用量在10份时既能起到较好的阻燃作用，又有润滑作用。     

国产MB-86催化剂使用情况分析

抚顺引进的５００００ｔ／ｙ丙烯腈装置要改造到７００００ｔ／ｙ的生产能力，其中更换国产催化剂ＭＢ－８６是较为关键的一步，文章对此进行了总结与分析。     

光敏性多元核-壳微球絮凝剂的制备

以Stöber法制备的单分散SiO2为核,采用溶胶-凝胶、界面沉积和表面活性剂模板法制备了多元核-壳结构微球SiO2@TiO2-Ag@SiO2,利用FT-IR、SEM、XRD、UV-Vis DRS、N2吸附-脱附、XPS对其结构和形貌进行了表征。结果显示：微球平均孔径、比表面积分别为2 nm、72.73 m2/g;受最外层SiO2影响,XRD未观察到锐钛矿相TiO2的特征衍射峰;紫外-可见漫反射光谱证实SiO2@TiO2-Ag@SiO2在365 nm处有吸收。在模拟太阳光照射下100 min,SiO2@TiO2-Ag@SiO2微球对亚甲基蓝(MB) 的光催化脱色率为97.6％;自然光下,对甲基橙溶液(MO)的絮凝沉淀时间为40 min,脱色率达99.7％。     

Studies of extraction of methylene blue from synthetic waste water using liquid emulsion membrane technology

A comprehensive study pertaining to liquid emulsion membrane (LEM) extraction process of methylene blue from wastewater is presented. The liquid membrane is made of an emulsifying agent (Monumal 80) with various organic diluents. Surfactant (5 wt%) (Monumal 80) and kerosene gave good extraction. Important variables affecting LEM permeation process include stability of membrane, contact time of extraction, strip phase concentration, treat ratio (strip phase: organic phase), stirring speed, feed phase concentration were systematically studied for percentage of extraction by LEM. Kerosene as diluent gave 99.57% extraction with NaOH as strip phase. © 2012 Canadian Society for Chemical Engineering     

EFFECT OF TEMPERATURE ON THE ADSORPTION OF METHYLENE BLUE DYE ONTO SULFURIC ACID–TREATED ORANGE PEEL

The present study explains the preparation and application of sulfuric acid–treated orange peel (STOP) as a new low-cost adsorbent in the removal of methylene blue (MB) dye from its aqueous solution. The effects of temperature on the operating parameters such as solution pH, adsorbent dose, initial MB dye concentration, and contact time were investigated for the removal of MB dye using STOP. The maximum adsorption of MB dye onto STOP took place in the following experimental conditions: pH of 8.0, adsorbent dose of 0.4 g, contact time of 45 min, and temperature of 30°C. The adsorption equilibrium data were tested by applying both the Langmuir and Freundlich isotherm models. It is observed that the Freundlich isotherm model fitted better than the Langmuir isotherm model, indicating multilayer adsorption, at all studied temperatures. The adsorption kinetic results showed that the pseudo-second-order model was more suitable to explain the adsorption of MB dye onto STOP. The adsorption mechanism results showed that the adsorption process was controlled by both the internal and external diffusion of MB dye molecules. The values of free energy change (ΔG ^o) and enthalpy change (ΔH ^o) indicated the spontaneous, feasible, and exothermic nature of the adsorption process. The maximum monolayer adsorption capacity of STOP was also compared with other low-cost adsorbents, and it was found that STOP was a better adsorbent for MB dye removal.     

黄原胶接枝聚丙烯酸水凝胶的合成及吸附性能——对亚甲基蓝染料的吸附行为

以黄原胶和丙烯酸为原料,N,N’一亚甲基双丙烯酰胺为交联剂,过硫酸钾为引发剂在水溶液中制得黄原胶接枝聚丙烯酸水凝胶,研究了其对阳离子染料MB（亚甲基蓝）的吸附行为,及对MB@吸附热力学。结果表明,XG—g—PAA水凝胶对MB的吸附行为符合Langmuir吸附等温式,其相关系数为0．9949i。     

二次挤压对MB26镁合金棒材组织及性能的影响

采用二次挤压工艺制备MB26(Mg-6.3Zn-0.7Zr-0.9Y-0.3Nd)镁合金棒材,研究不同挤压比对MB26合金组织性能的影响,通过金相(OM)、X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)等手段分析稀土元素在合金中的分布及其对微观组织的影响。结果表明:合金在二次挤压过程中发生动态再结晶,随着挤压比的增加,再结晶晶粒细化,当挤压比λ=25时,平均晶粒尺寸为1.9μm,合金力学性能达到最优;合金经挤压变形后出现大量W(Mg3Y2Zn3)相和β′(MgZn)相,均呈弥散分布,钉扎晶界,阻碍了动态再结晶晶粒的长大。通过数据拟合得到该合金屈服强度与晶粒尺寸的Hall-Petch关系。     

纳米LiInO2光催化剂的溶胶-凝胶法制备与表征

本文利用溶胶-凝胶法制备了LiInO₂纳米材料,采用X-射线衍射(XRD)、扫描电镜(SEM)和紫外-可见吸收光谱等测试手段,研究了制备条件对LiInO₂微观结构的影响因素,并以亚甲基蓝为目标降解物研究了LiInO₂的光催化性能。研究结果表明：制备的LiInO₂纳米粒子具有LiFeO₂的晶型,颗粒尺寸约50-100纳米,制备样品的焙烧温度对其结构和性能产生了明显地影响,在氙灯(300W)照射90 min条件下,纳米LiInO₂对亚甲基蓝的光催化降解率达92%,活性位点捕获实验表明光生空穴在降解亚甲基蓝的机制中占主导作用。     

基于TCP/IP＆DMX512协议的LED装饰照明系统

本文介绍品能光电技术（上海）有限公司近两年来运用TCP/IP ＆ DMX512协议的LED装饰照明控制系统.本系统可轻松将文字、FLASH动画、视频、图像等媒体信息方式表现于基于LED装饰照明的建筑等景观中,表现出丰富多样的变化效果.广泛应用于工程建筑景观、舞台灯光、大型活动、节庆场所等场合的灯光装饰.用户可在世界各地用IE或Nescap 等现有的Web浏览器,对LED装饰照明系统进行控制.