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Fabrication of mesoporous silica-covered gold nanostars for chemophototherapy
Jun Hou,Yanbao Zhao,Lei Sun,Xueyan Zou 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.114 No.-
Gold nanomaterials have attracted great interest in the fight against cancer due to their surface features. In this study, gold nanostar (GNS) cloaked with mesoporous silica (GNS@mSiO2) carriers were preparedfor controlled drug release. The GNS core presents a branched morphology with tip-to-tip diameter of80–120 nm and core of 40–60 nm. In this system, GNS not only served as photothermal agent but alsoas Raman signal enhancement matrix. After encapsulating doxorubicin (DOX) within the GNS@mSiO2carrier, hyaluronic acid (HA) was coated on the GNS@mSiO2 surface to seal the loaded-drug of channels. The obtained DOX-GNS@mSiO2/HA displayed pH/enzyme-triggered drug release and photothermalchemotherapeutic effect.
Xiaojun Tao,Shuang Wang,Yanbao Zhao,Zhiwei Li 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2018 NANO Vol.13 No.2
In this paper, a facile one-pot bottom-up approach for the preparation of graphene and Ni/graphene nanostructures at normal pressure and low temperature (150 ℃) has been developed. The graphene and Ni/graphene nanostructures were prepared by reducing hexachloro-benzene (C6Cl6 Þ with potassium in n-tetradecane (C14H30) solution without the presence of a catalyst. Meanwhile, the effect of Ni content on the specific surface area (SSA) of the final products was investigated. The testing results display that the as-prepared samples have large SSA and high C/O ratio, implying that the designed synthesis method is simple and efficient. To evaluate the adsorption performances of the samples, we select organic dye rhodamine B (RhB) as the model organic contaminant in aqueous solutions. The experimental results show that the samples possess high adsorption capacity (qmax = 943.4mg g -1), ultrafast adsorption rate (> 99%, 2 min), high adsorption efficiency ( ≥ 99.8%) and good chemical stability in a wide pH range (2–11), high salt tolerance (> 80 mg mL -1), and good reusability (> 99.5%, 9 cycles) for dye RhB from water. In particular, the samples exhibit a good property for the treatment of the raw industrial wastewater (RIW).
Dendritic porous SnO2/SiO2@polymer nanospheres for pH-controlled styptic drug release
Na Cao,Xin Xie,Yu Zhang,Yanbao Zhao,Liuqin Cao,Lei Sun 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.34 No.-
Dendritic porous tin oxide/silica (DTS) nanospheres (NSs) were prepared by emulsion-condensationroute. DTS NSs have an average diameter of 80 nm and possess accessible center-radial large porechannels, which endow them high surface area, less drug diffusion resistance and more mass transport. SnO2 quantum dots (QDs) embedded in silica skeleton can be used to track the drug release behavior. DTS NSs were coated by chitosan/polymethacrylic acid and polymer shell would make them achievegreat loading capacity and pH-sensitive release for aminomethylbenzoic acid (AMBA).