欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
采用分子自组装技术,以均匀分散的纳米TiO2溶胶作为合成六方介孔氧化硅（hexagonal mesoporous silica,HMS）的钛源,制备了比表面积高达1 479 m2/g的包覆纳米TiO2粒子的TiO2/HMS复合材料。对样品的结构及微观形貌进行研究。结果表明：尺寸为50 nm左右的TiO2粒子与HMS界面以Si—O—Ti键结合,高度分散在作为包覆层的HMS之中。HMS的Fourier变换红外光谱上960 cm–1处颇具争议的吸收峰,对应的是硅羟基发生再聚合反应所生成的存在于六方孔洞内部水的O—H键面内变形弯曲振动。经640℃煅烧4 h的TiO2/HMS复合材料样品具有最强的光催化活性,在测试浓度范围内,经紫外光光照140 min,甲基橙降解量达到58%。其原因是大的比表面积导致对氧气和水分的吸附能力增强,从而有利于高活性？OH自由基的生成
英文摘要：
Nano-particles of TiO2 coated hexagonal mesoporous silica（HMS）（TiO2/HMS） composite with the specific surface area of 1 479 m2/g were prepared by a self-assembly method with dispersed nano-sol of TiO2 as a titanium source.The structure and mi-cro-morphology of the TiO2/HMS samples were investigated.The results show that the nano-particles with the average size of 50 nm are well dispersed in the HMS,and Si—O—Ti bonds are formed in the interface between TiO2 and HMS.The analysis by Fourier transform infrared spectroscopy indicated that a controversial absorption band located at 960 cm–1 in of HMS was O—H in-plane deformation bending vibration of water,which produced in the polymerization reaction of hydroxyl groups remained in the HMS.After 140 min radiation under ultraviolet light,the sample exhibited a superior photo-catalytic activity due to the greater specific sur-face area,which led to the absorption of O2 and H2O that favored to produce more ？OH free radicals.The sample sintered at 640 ℃ for 4 h was degraded by 58% of methyl orange
同期刊论文项目
同项目期刊论文
Mineralization regulation and biological influence of bioactive glass-collagen-phosphatidylserine co
Poly(lactide-co-glycolide)/titania Composite Microsphere-Sintered Scaffolds for Bone Tissue Engineer
Modified PHBV scaffolds by in situ UV polymerization: Structural characteristic, mechanical properti
Surface Modification of PHBV Films with Different Functional Groups: Thermal Properties and In Vitro
In vivo and in vitro osteogenesis of stem cells induced by controlled release of drugs from microsph
Genipin-cross-linked collagen/chitosan biomimetic scaffolds for articular cartilage tissue engineeri
Microsphere-based drug releasing scaffolds for inducing osteogenesis of human mesenchymal stem cells
Redifferentiation of Dedifferentiated Chondrocytes by Adenoviral Vector-Mediated TGF-beta 3 and Coll
In Situ Fabrication of Nano-hydroxyapatite in a Macroporous Chitosan Scaffold for Tissue Engineering
Characterization and biocompatibility of nanohybrid scaffold prepared via in situ crystallization of
Preparation of Regular Micropitted Polylactide Films via Phase Separation and Their Cell Affinity Ev
A novel hydrophilic poly(lactide-co-glycolide)/lecithin hybrid microspheres sintered scaffold for bo
A protein/antibiotic releasing poly(lactic-co-glycolic acid)/lecithin scaffold for bone repair appli
Synthesis and Characterization of New Unsaturated Degradable Poly(ether ester amide)s Containing Eth
Biomimetic Synthesis of Porous Composite Scaffold Composed of Nano-Hydroxyapatite and Chitosan by Fr
In-vitro osteogenesis of synovium stem cells induced by controlled release of bisphosphate additives
Progress in the Biomineralization Study of Bone and Enamel and Biomimetic Synthesis of Calcium Phosp
Enhancing Alendronate Release from a Novel PLGA/Hydroxyapatite Microspheric System for Bone Repairin
Surface characterization of polyethylene terephthalate films treated by ammonia low-temperature plas
Structure and surface nanomechanics of poly(L-lactide) from thermally induced phase separation proce
Layer-by-layer assembly of type I collagen and chondroitin sulfate on aminolyzed PU for potential ca
Preparation and evaluation of biomimetric nano-hydroxyapatite-based composite scaffolds for bone-tis
期刊信息
位置：