Journal
CHEMICAL ENGINEERING JOURNAL
Volume 268, Issue -, Pages 102-108Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2015.01.021
Keywords
AgNPs-PoPD; Shear rate; Morphology-controlled synthesis; H2O2 sensor; Microfluidics; Simulations
Categories
Funding
- National Natural Science Foundation of China [21273059, 21003032]
- Fundamental Research Funds for the Central Universities [HIT. KISTP. 201407]
- State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology) [2014DX09]
- Harbin Science and Technology Research Council [2014RFXXJ063]
- Open Research Fund of the State Key Laboratory of Electroanalytical Chemistry [SKLEAC201313]
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Shear rate was utilized for the morphology-controlled synthesis of silver nanoparticle decorated poly(o-phenylenediamine) (AgNPs-PoPD) using microfluidics. The morphology of AgNPs-PoPD, such as bundles of belts, twisted fibers, clusters, and microspheres, as well as the composition of AgNPs-PoPD clusters can be easily controlled by changing shear rates, which may provide a new potential method for the property control of materials. The phase diagram of AgNPs-PoPD morphology against reactant flow rate was obtained. The formation mechanism of different morphology of AgNPs-PoPD were analyzed and discussed based on numerical simulations. A H2O2 sensor based on AgNPs-PoPD spheres was fabricated, due to its good catalytic activity toward the reduction of H2O2. The linear detection range is determined to be from 20 mu M to 180 mu M, with the detection limit of 5.7 mu M at a signal-to-noise ratio of 3. (C) 2015 Elsevier B.V. All rights reserved.
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