X-shaped hollow α-FeOOH penetration twins and their conversion to α-Fe2O3 nanocrystals bound by high-index facets with enhanced photocatalytic activity

通讯作者地址: Wang, ZCNonspherical hollow nanoparticles (NHNPs) have attracted a great deal of attention in recent years due to their unique properties and many promising applications. However, compared to hollow spheres, the fabrication of NHNPs is generally much more difficult and there are only a few successful examples to date. In this work, X-shaped hollow alpha-FeOOH penetration twins were first synthesized by a facile hydrothermal reaction. X-shaped alpha-Fe2O3 hollow nanostructures with high-index {11 (2) over bar3} facets exposed were further obtained via the topotactic transformation of alpha-FeOOH precursor. To the best of our knowledge, this is the first report on the nanostructures with high-index facets as well as a hollow interior. Owing to the special hollow structure and the high-energy surface, the as-obtained alpha-Fe2O3 nanocrystals show excellent visible-light photocatalytic activity toward the degradation of RhB.State Key Development Program for Basic Research of China 2007CB935603 National Natural Science Foundation of China 5137221

Hematite concave nanocubes and their superior catalytic activity for low temperature CO oxidation

Hematite (α-Fe2O3) concave nanocubes bound by high-index {1344} and {1238} facets were synthesized and their catalytic activity for CO oxidation were also investigated. ? 2014 the Partner Organisations

Development of Microwave Dielectric Materials and Its Applications

[中文文摘]详细论述了微波介质材料与器件国内外现状和技术发展趋势, 分析了应用前景和国内市场需求,对我国“十一·五”发展方向和重点研究课题提出了建议。[英文文摘]Presented are the histores, recent situation and development of microwave dielectric materials and its applications. The communication market, research and production of the microwave dielectric materials and devices in China and the solutions are discussed

Study on Electrosynthesis of Butyl Butyrate at Conducting Oxide Anode Support on Titanium

本文研究了某些氧化物电极在不同条件下对丁醇电解直接合成丁酸丁酯的影响，并测定了这些氧化物电极上的丁醇氧化极化曲线．结果表明Ｔｉ／ＰｂＯ２电极在加入ＳｎＯ２、Ｓｂ２Ｏ３、ＰｄＯｘ中间层后，不仅电极的ＰｂＯ２层不易脱落，而且使电极的电催化性能有较大的提高．Synthesis of butyl butyrate by direct electroxidation of n butyl alcohol and the electrochemical behaviors of several selected conducting oxide electrodes (Pb/PbO 2、Ti/PbO 2、i/SnO 2 +Sb 2O 3 /PbO 2 and Ti/SnO 2+Sb 2O 3+PdO x/PbO 2) have been investigated. The results demonstrated that the intermediate layers of SnO 2、Sb 2O 3 and PdO x could significantly decrease the interfacial resistance of the electrodes,and that the Ti/SnO 2+Sb 2O 3+PdO x/PbO 2 electrode possessed better electrocatelytic performance than others.作者联系地址：温州师范学院化学系,华东师范大学化学系Author's Address: Dept. of Chem., Wenzhou Normal Co., Wenzhou 325003 Chen Kangning Dept. of Chem., East China Normal Univ., Shanghai 20006

一种生物基水溶性高分子溶液及其制备方法和应用

本发明公开了一种生物基水溶性高分子溶液的制备方法，包括以下步骤：1）将胺和生物基二元酸经第一反应得到缩聚高分子，再用水溶解，得到缩聚高分子的水溶液；2）将步骤1）得到的缩聚高分子的水溶液与环氧卤代烷或1,3-二卤-2-丙醇经过第二反应得到生物基水溶性高分子溶液，其制备过程简单易控，产物稳定。本发明制备方法可制备低成本、固含量可调的生物基水溶性高分子溶液，解决现有蛋白质胶黏剂耐水性差、固化剂来源于石化资源的问题，不但没有甲醛释放、粘接强度和耐水性大大提高，而且易于制备、使用方便。本发明还提供了一种生物基水溶性高分子溶液的应用，可作为固化剂使用，可应用于制备蛋白质胶黏剂

东湖通道工程对沿线水域水生植物的影响

东湖通道是武汉市在建的交通路网工程,穿越东湖风景区,其中约5 km为湖底隧道。通过研究施工围堰对沿线水域水生植物的影响,可为湖泊管理提供应对措施。于2014年3月和5月通道工程施工期间,在其沿线的典型水域如封闭区域、半封闭区域、敞水湖湾、敞水迎风岸带和新形成的堤岸外共设置16个采样点,调查水生植物的种类、生物量和水质参数等。结果表明,水生植物群落结构受水温的影响,3月采样时平均水温为13.7℃,未发现挺水植物,采集到菹草(Potamogeton crispus)、穗花狐尾藻(Myriophyllum spicatum)和五刺金鱼藻(Ceratophyllum oryzetorum)3种沉水植物以及荇菜(Nymphoides peltatum)1种浮叶植物,可见少量的漂浮植物浮萍(Lemna minor),其中沉水植物菹草为绝对优势种;5月的平均水温为24.8℃,除上述3种沉水植物外,还采集到了苦草(Vallisneria natans),但菹草的优势地位明显下降,另外采集到了荇菜和菱(Trapa bicornis)2种浮叶植物,荇菜的相对生物量和优势度最高,也可见少量的浮萍。在相对封闭的水域,因受风浪的影响较小,这些区域相对于迎风岸带具有较高的水生植物覆盖度和生物量,水体的营养盐浓度也相对较高,总氮(TN)和总磷(TP)浓度的高低与水生植物生物量多少的变化趋势一致。通道施工形成的新岸堤外,只有部分位点分布有水生植物,其原因可能是因为目前这些位点缺乏种源、水体较深、透明度低等。由于通道围堰施工增加了沿线的封闭水体,使得水生植被的覆盖度和生物量大幅度提高,通道施工对其沿线水生植物的影响是正面的;施工期间对水生植物没有产生不利影响,但在工程竣工后拆除围堰时,须防止悬浮物和机械扰动对现有植被的破坏

Chaotic sign used for Adjunctive Treatment of Medically Refractory Epilepsies:A Pilot Study

目的　探讨混沌电信号辅助治疗难治性癫痫的疗效和耐受性。方法　设计输出混沌电信号的刺激仪 ,用于辅助治疗难治性癫痫 6例 ,经 6个月的随访观察 ,比较治疗前后发作频率及严重程度的变化。结果　所有病例对此种措施的耐受性均良好 ,且发作频率和发作严重度有不同程度降低。结论　混沌信号治疗癫痫有其光明前景 ,但用于临床仍有大量理论及技术问题有待解决Purpose:Undoubted evidence of chaotic activity of a biological neural network have been given in recent years.Controlling chaos could help treat epilepsy which has been demonstrated in hippocampal slices.The efficacy and tolerance of chaotic sign for adjunctive treatment of medically refractory epilepsies were investigated in this study.Methods:The stimulators which give off chaotic sign were designed,we added chaotic sign stimulation to stable antiepileptic drug therapy in 6 medically refractory epileptics.Rates and seizure severity scales were compared between different periods before and during adjunctive therapy.Results:Chaotic sign stimulation were well tolerated;all patients responded to adjunctive therapy. Conclusion :We concluded that chaotic sign stimulation may be useful add on for medically refractorry epilepsies.A larger,controlled,and blinded trial may be warranted and many theoretical and practical questions are to be resolved.自然科研基金资