Yi Wang

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Organization: Fudan University

Department: Department of Chemistry, Innovative Center of Chemistry for Energy Materials

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TOPICS

Material Chemistry

Graphene & Graphite

Polymer

UV Absorbents

Chemicals
References

A simple preparation of Ag@graphene nanocomposites for surface-enhanced Raman spectroscopy of fluorescent anticancer drug

Co-reporter:Ying Meng, Xueying Yan, Yi Wang

Chemical Physics Letters 2016 Volume 651() pp:84-87

Publication Date(Web):May 2016

DOI:10.1016/j.cplett.2016.03.023

Highlights

•: Facile one-step simultaneous reduction method is developed to synthesize Ag@graphene composite.
•: The uniformed Ag nanoparticles are closely attached on the reduced graphene nanosheets.
•: The sensitive SERS detection of Dox can be synergistically achieved.

Facile preparation of N-doped mesocellular graphene foam from sludge flocs for highly efficient oxygen reduction reaction

Co-reporter:Daixin Ye, Li Wang, Ren Zhang, Baohong Liu, Yi Wang and Jilie Kong

Journal of Materials Chemistry A 2015 vol. 3(Issue 29) pp:15171-15176

Publication Date(Web):11 Jun 2015

DOI:10.1039/C5TA03060A

The use of environmental waste products as materials for the production of energy is an extremely attractive prospect for both economic and social development. Sludge flocs (SFs) are environmental waste products that are difficult to handle. We used these SFs as a source of carbon and nitrogen for the preparation of N-doped mesocellular graphene foam (SF-NMGF) via a simple one-step pyrolysis method. The particular composition and structure of the SFs meant that the resultant SF-NMGF had a large Brunauer–Emmett–Teller surface area and consisted of a graphitic framework surrounded by ultrathin nanosheets. The material contained foam-like mesopores with a size centred at about 15 nm and the N was incorporated homogeneously with a high percentage (40.5 at%) of graphitic-N. As a result of these unique properties, the SF-NMGF had an excellent electrocatalytic activity with 4e when used as a metal-free catalyst for the oxygen reduction reaction (ORR). Specifically, the prepared SF-NMGF catalyst exhibited a high diffusion-limited current, superior durability and better immunity towards methanol crossover for the ORR in alkaline solution than a commercial 20 wt% Pt/C catalyst. The synthesis of the SF-NMGF can be scaled up at low cost, which will be beneficial for both sludge handling and the development of materials for the ORR.

Specific aptamer-conjugated mesoporous silica–carbon nanoparticles for HER2-targeted chemo-photothermal combined therapy

Co-reporter:Kaiyuan Wang, Hui Yao, Ying Meng, Yi Wang, Xueying Yan, Rongqin Huang

Acta Biomaterialia 2015 Volume 16() pp:196-205

Publication Date(Web):1 April 2015

DOI:10.1016/j.actbio.2015.01.002

Abstract

Tumor-specific therapeutic platforms designed for combined tumor therapy has recently received wide attention. In this work, a new HB5 aptamer-functionalized mesoporous silica–carbon based doxorubicin (DOX)-loaded system (MSCN-PEG-HB5/DOX) was successfully constructed and characterized for chemo-photothermal combined therapy of human epithelial growth factor receptor 2 (HER2)-positive breast cancer cells. The in vitro release result showed that MSCN-PEG-HB5/DOX exhibited pH-sensitive and NIR-triggered release manner. HB5-modified nanoparticles showed significant higher cellular uptake in HER2-positive breast cancer cells (SK-BR-3) but not in normal breast epithelial cells (MCF-10A), compared to unmodified counterparts. The intracellular uptake of functional nanoparticles was mainly based on the receptor-mediated mechanism which was energy-dependent. Cytotoxicity experiments demonstrated that combined therapy induced highest cell killing effect compared to chemotherapy and photothermal therapy alone. The combination index (CI) was 0.253 indicating the synergistic effect of chemotherapy and photothermal therapy. These findings suggested that MSCN-PEG-HB5/DOX was a potential chemo-photothermal therapeutic platform targeting to HER2-positive breast cancers.

Co-calcination-derived Pd budded in N-Doped Ordered Mesoporous Graphitic Carbon Nanospheres for Advanced Methanol-tolerant Oxygen Reduction

Co-reporter:Daixin Ye, Ren Zhang, Yiming Fu, Juan Bu, Yi Wang, Baohong Liu, Jilie Kong

Electrochimica Acta 2015 160() pp: 306-312

Publication Date(Web):

DOI:10.1016/j.electacta.2015.01.157

Synthesis and formation of hierarchical mesoporous silica network in acidic aqueous solutions of sodium silicate and cationic surfactant

Co-reporter:Yi Wang

Colloid Journal 2010 Volume 72( Issue 6) pp:737-742

Publication Date(Web):2010 December

DOI:10.1134/S1061933X10060025

Synthesis and formation of hierarchical mesoporous silica network in acidic aqueous solutions of commercial sodium silicate and cationic surfactant were studied by SEM, TEM, XRD and nitrogen adsorption-desorption methods. The formation process occurs through several steps, involving (1) formation of mesoporous silica nanoparticles; (2) aggregation of mesoporous silica nanoparticles into blocks; (3) growth of silica nanorods in closely-packed arrays by merging of silica nanoparticles; (4) separation of the nanorods to form 3D silica network; and (4) shrinking of the mesoporous silica network. The as-prepared 3D silica network exhibits bimodal morphology constituting mesoporous and macroporous phases.

Photothermal combined gene therapy achieved by polyethyleneimine-grafted oxidized mesoporous carbon nanospheres

Co-reporter:Ying Meng, Shanshan Wang, Chengyi Li, Min Qian, Xueying Yan, Shuangchao Yao, Xiyue Peng, Yi Wang, Rongqin Huang

Biomaterials (September 2016) Volume 100() pp:134-142

Publication Date(Web):September 2016

DOI:10.1016/j.biomaterials.2016.05.033

Facile preparation of N-doped mesocellular graphene foam from sludge flocs for highly efficient oxygen reduction reaction

Co-reporter:Daixin Ye, Li Wang, Ren Zhang, Baohong Liu, Yi Wang and Jilie Kong

Journal of Materials Chemistry A 2015 - vol. 3(Issue 29) pp:NaN15176-15176

Publication Date(Web):2015/06/11

DOI:10.1039/C5TA03060A