LR20/LR14电池兼容生产线的工艺探讨

介绍了LR20L/R14碱性锌锰电池兼容生产线设备及工艺特点,讨论了通过工艺改进,实现同一套设备可兼容生产两种型号的碱锰电池。实验数据表明,4个正极环结构的LR20电池其放电性能有所提高。     

钼掺杂的铌镧酸的合成及光催化性能研究

通过高温固相反应合成了钼掺杂的铌镧酸钾系列,并通过离子交换反应制备出钼掺杂的铌镧酸系列;采用X-射线衍射、紫外可见漫反射光谱、原子吸收光谱、比表面积测定等对所制得的样品进行了表征.在甲醇为给电子体,铂为助催化剂的条件下,用波长＞290nm的100W汞灯辐照时,钼掺杂的铌镧酸系列表现出了分解水产生氢气的光催化活性,当掺杂浓度为Mo/Nb=2.5mol%时,其产氢速率达到最大值.     

便携式核仪器电源的设计

如何为便携式产品供电一直是备受关注的话题,各种新型的电池及电源管理器件的应用,为人们的生产生活带来巨大方便,在便携式仪器应用上,以可充电电池的应用较为广泛,但是在某些不方便充电的特殊应用场合,充电式电源的便利性就会受到限制,本文便是探讨如何利用可充电电池与传统的碱性干电池相结合,为便携式仪器供电.     

花生蛋白的高静压联合酶法改性及其性质

为促进花生蛋白的深加工和更广泛的应用,采用高静压联合碱性蛋白酶酶法改性花生蛋白。通过单因素试验考察了静压力、pH、酶添加量、酶解时间和酶解温度对花生蛋白溶解度的影响,在此基础上,采用正交试验优化花生蛋白联合改性工艺条件,并测定了联合改性花生蛋白的起泡性和泡沫稳定性、巯基和二硫键含量以及总还原能力。结果表明：花生蛋白联合改性最佳工艺条件为静压力300 MPa、1 g/100 mL碱性蛋白酶（20万U/g）添加量3.0 mL（100 mL质量分数5%的花生蛋白溶液）、酶解时间60 min、pH 10、酶解温度50 ℃,在此条件下联合改性花生蛋白溶解度为（82.87±0.51）%;联合改性花生蛋白的起泡性、泡沫稳定性、巯基含量、总还原能力显著提高,二硫键含量显著下降。综上,高静压联合酶法改性改善了花生蛋白的理化性质及功能特性,有利于其深加工及更广泛的应用。     

TiO2/膨胀石墨复合材料的制备及其对亚甲基兰的光催化降解

采用快速升温法制备出以膨胀石墨为载体的TiO2/膨胀石墨光催化剂,用SEM及XRD对其表面形貌及结构进行表征,研究了该负载型光催化剂在紫外光照射下的催化能力,探讨了在催化剂中TiO2的负载量、亚甲基兰溶液的初始浓度及其pH值对光催化剂的降解能力的影响.结果发现,负载量为10%的光催化剂对40mg/L的亚甲基兰溶液5h的光降解率达到58.8%.     

Photocatalytic Degradation of 4,4′-Isopropylidenebis(2,6-dibromophenol) on Magnetite Catalysts vs. Ozonolysis Method: Process Efficiency and Toxicity Assessment of Disinfection By-Products

Flame retardants have attracted growing environmental concern. Recently, an increasing number of studies have been conducted worldwide to investigate flame-retardant sources, environmental distribution, living organisms’ exposure, and toxicity. The presented studies include the degradation of 4,4′-isopropylidenebis(2,6-dibromophenol) (TBBPA) by ozonolysis and photocatalysis. In the photocatalytic process, nano- and micro-magnetite (n-Fe₃O₄ and μ-Fe₃O₄) are used as a catalyst. Monitoring of TBBPA decay in the photocatalysis and ozonolysis showed photocatalysis to be more effective. Significant removal of TBBPA was achieved within 10 min in photocatalysis (ca. 90%), while for ozonation, a comparable effect was observed within 70 min. To determine the best method of TBBPA degradation concentration on COD and TOC, the removals were examined. The highest oxidation state was obtained for photocatalysis on μ-Fe₃O₄, whereas for n-Fe₃O₄ and ozonolysis, the COD/TOC ratio was lower. Acute toxicity results show noticeable differences in the toxicity of TBBPA and its degradation products to Artemia franciscana and Thamnocephalus platyurus. The EC₅₀ values indicate that TBBPA degradation products were toxic to harmful, whereas the TBPPA and post-reaction mixtures were toxic to the invertebrate species tested. The best efficiency in the removal and degradation of TBBPA was in the photocatalysis process on μ-Fe₃O₄ (reaction system 1). The examined crustaceans can be used as a sensitive test for acute toxicity evaluation.     

碱回收炉的发展趋势

论述了国内外碱法制浆造纸企业碱回收炉的发展趋势。为进一步提高经济效益，增进安全生产和加强环境保护，大型的高参数的单汽包低臭型碱回收炉得到了发展和应用。     

嗜碱性芽孢杆菌碱性纤维素酶酶系的研究

本文研究了各种碳、氮源、ｐＨ、通风量等工艺条件对嗜碱性芽孢杆菌Ｖ－５产酶酶系的影响，通过酶在表面活性剂中的实验，分析不同表面活性剂对酶系中各组分的影响，初步研究酶系与去污力的关系，认为除以内切酶为主外，酶系中另二个组分，在去污效果中的辅助作用不容忽视。     

氧化钛纳米管催化剂薄膜背光催化的研究

本文采用水热法制备了氧化钛纳米管催化剂薄膜,建立了背光催化数学模型,讨论了薄膜厚度和光源波长对背光催化的影响,并进行了实验验证。结果表明：当催化剂薄膜厚度为d唯,且对应选择光源波长为λopt时,背光催化效率ηb达到最佳ηb（dopt）。该研究对光催化工业化推广应用具有重要意义。     

In situ hydrothermal synthesis of Y-TiO2/graphene heterojunctions with improved visible-light-driven photocatalytic properties

The Y-TiO₂/graphene heterojunctions were prepared using a facile one-pot hydrothermal method. The SEM and TEM images showed that titanium dioxide and flaky graphene were tightly bound together, and XPS indicated that yttrium was doped uniformly into the complex. The crystal phase of titanium dioxide in Y-TiO₂/graphene composite was anatase, and the yttrium doping caused distortion of the titanium dioxide lattice, resulting in a new valence type and more defects. An appropriate amount of yttrium doping and graphene modification significantly improved the separation of photogenerated electron-hole pairs. In the degradation of rhodamine B, the co-modification of yttrium and graphene effectively improved the photocatalytic activity under visible and UV–vis light irradiation. With the amount of yttrium increasing, the photocatalytic activity of the Y-TiO₂/graphene complex first increased and reached the highest level of 40% and 63% for visible and ultraviolet-visible light, respectively, when the ratio of yttrium was increased to 1.0%. The enhancement of photocatalytic activity can be explained by the presence of yttrium ions increased the visible light absorption of titanium dioxide. Besides, the synergistic effect between yttrium ions and graphene effectively improved the separation rate of photoinduced electron-hole pairs.