A Study on of Fe^3＋ and Photocatalytic W^6＋ Co-doped performance Nano-- TiO2

采用溶胶凝胶法制备了Fe3+/W6+共掺杂纳米TiO2光催化剂,利用XRD、SEM、FT-IR以及荧光光谱(PL)等对样品进行表征,结果表明:共掺杂纳米TiO2的形状以球形为主,粒径约为20~30nm,晶型为锐钛矿型;粒子表面吸附了大量的水分子和羟基;共掺杂TiO2纳米粒子并没有引起新的荧光现象,Fe3+和W6+产生了协同作用,有效抑制了光生电子和空穴的复合.以甲基橙为目标污染物研究了共掺杂纳米TiO2的光催化性能,结果表明:Fe3+/W6+共掺杂纳米TiO2的光催化活性比未掺杂或单一掺杂0.05%Fe3+纳米TiO2的光催化活性都高,当Fe3+/W6+掺杂浓度分别为0.05%和0.04%时,甲基橙的降解率达到最高,达到94.6%.Fe^3＋ and W^6＋ Co--doped Nano-- TiO2 was prepared with Sol--Gel method and characterized by XRD, SEM, FT--IR, PL. The results indicate that the shape of Co--doped Nano-- TiO2 is mainly sphericity, the particlesize is about 20-30 nm and the crystal model is anatase. The particle face absorb a great deal of water and hydroxide. The Co-- doped Nano-- TiO2 doesn＇ t bring a new fluorescence. Synergis- tic effect of Fe^3＋ and W^6＋ restrain the compound of photoelectron and cavity effectively. The Photocatalytic performance of Co--doped Nano-- TiO2 was studied with methyl orange as a infectant. The results indicate that the Photocatalytic activity of Co--doped Nano-- TiO2 is higher than the pure Nano-- TiO2 and single-- doped Nano-- TiO2. When the concentration of Fe^3＋ and W^6＋ is 0.05% and 0.04%, the dedagration rate of methyl orange is highest and excess 94.6 %

Low cost process for zinc phosphate anticorrosive pigment

采用氨 -碳铵溶液净化低度氧化锌生产磷酸锌的新工艺 ,克服了直接法固 -液反应的弊病 ,较明显地降低了原料成本。广西民族学院青年基金项

纳米结构In2O3八面体的碳还原法合成

>准一维氧化物纳米材料因其特殊的光学性能、电学性能及空间几何结构而广受关注,到现在为止已经制备出多种准一维二元氧化物纳米结构,例如ZnO,SnO2,Ga2O3,In2O3,SiO2,MgO,Al2O3 等。这类材料的制备方法也是多种多样,主要有激光烧蚀法(Laser ablation method)、气相蒸发法 (Vapor-phase evaporation)、模板法(Template-ba广西科学自然基金资助项目(桂科基0575030)广西科技攻关资助项目(桂科攻0155015

Thermal resistance analytical model for thermoelectric component with series-parallel connection

为了选择合适的温差电组件和外部换热器,根据非平衡态热力学理论和牛顿冷却定律,对温差电组件采用串并联连接方式的温差发电系统进行了研究,导出了系统输出功率的热阻解析模型,探讨了温差电组件总数量、并联组件数量、热电模块及其热端和冷端的热阻等对系统性能的影响.结果表明,系统电阻与负载电阻、热电模块热阻与其热端和冷端的热阻之间存在匹配关系,能使系统获得最大的输出功率;随着并联组件数量的增加,最大输出功率和回路电流得到了提高,但系统的输出电压却降低了.研究结果为温差发电系统的合理装配及性能优化提供了理论参考.In order to choose the appropriate thermoelectric components and external heat exchangers,the thermoelectric generation system with series-parallel connection of thermoelectric components was investigated according to the non-equilibrium thermodynamics theory and Newton cooling law,and the thermal resistance analytical model for system output power was derived.In addition,the effect of total number of thermoelectric components,number of components with parallel connection,thermoelectric module as well as thermal resistance at both hot and cold ends of the module on the system performance was discussed.The results show that there is a matching relationship between the system resistance and load resistance.Moreover,the thermal resistance of thermoelectric module and the thermal resistance at both hot and cold ends of the module also exhibit a matching relationship.Therefore the maximum output power can be obtained for the system.With increasing the number of components with parallel connection,the maximum output power and loop current get enhanced,while the output voltage of the system decreases.The present results can provide the theoretical reference for the reasonable assembly and performance optimization of thermoelectric generation system.广东省重大科技专项项目(2008A080302002;2010A080405003);粤港关键领域重点突破项目(佛山专项)(2009Z015

MnO2纳米结构的常温液相催化合成

具有一维纳米结构和球型纳米结构的材料因有着比普通块体材料更为丰富的物理和化学特性, 冈而有着更加广泛的实际应用。一维纳米结构具有优良的化学、光学、热稳定及机械性能,因此可用作未来微型仪器的构建基元;纳米球型结构在催化、药物传输、光电子材料、化学或生物传感器等方面有着广泛的应用。通过VLS机理的多相催化方法常被用来合成一维纳米结构,生成物在催化剂表面过饱和而生长成一维纳米材料。广西科学自然基金资助项目(桂科基0575030)广西科技攻关资助项目(桂科攻0155015

氧化锌纳米片阵列的室温液相合成

ZnO纳米结构具有广泛的应用前景和实用价值,它在电子学和光电子学领域有着重要的研究价值,在未来的纳米器件中将扮演重要角色。有多种方法制备ZnO纳米结构．相对而言,溶液法途径简单容易操作,而且溶液合成路线易放大实现产业化L．Vayssieres等人发表了一种湿化学方法在硅片、SnO2玻璃琍、蓝宝石等基底上面制备ZnO纳米棒阵列,不需要任何模板和表面活性剂。有人采用高温氧化金属表面的方法来制备氧广西科学自然基金资助项目(桂科基0575030)广西科技攻关资助项目(桂科攻0155015

Recovering Zinc Acetate from Waste Vinyl Acetate Catalyst in Order to Prepare Non - toxic Zinc Phosphate

提出用微波-超声波联用技术对废触媒进行脱附处理的方法,同时回收活性炭和醋酸锌,利用醋酸锌制备磷酸锌。广西民族学院大学生挑战杯科技项

电热蒸馏水器的缺水保护装置研制

本文介绍一种电热蒸馏水器的缺水保护装置。试验证明,当缺水时,该装置可自行断电,从而起到保护电热蒸馏水器的作用

Test on the Improvement of Cultural Water Environment by Preparation of Photosynthetic Bacteria

在鱼、虾育苗池、淡水养殖池以及观赏鱼养殖水体中,采用活菌数大于50亿/mL的光合细菌制剂改良水质,测定了使用前后水的pH、COD、氨氮、亚硝酸盐、溶解氧等指标,结果表明,光合细菌制剂的质量分数越高,改善养殖水体水质的效果越好。广西民族学院重点项目(2003

Exploration of Improving Students’Comprehensive Quality and Innovative

化工原理实验是化工类专业一门重要的专业基础课。为了加强实验教学环节,结合教学实践,对实验教学内容、教学模式、实验教学管理和科学考核体系等方面进行改革和实践,提高了学生综合素质和创新能力。Abstract: Principles of Chemical Engineering Experiment was an important professional basic course of chemical engineering． In order to strengthen the experimental teaching，combining teaching practice，the teaching mode，the experiment teaching content，experiment teaching management，and scientific evaluation system were reformed and practiced to improve the students＇ comprehensive quality and innovative ability．新世纪广西高等教育教改工程项目(2010JGA022,2011JGZ021);广西高等学校特色专业及课程一体化建设项目(GXTSZY008);2010年广西民族大学校级教改工程项目;2010年广西民族大学基础化学示范中心教学研究项