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배나래찬,박한음,유필진,신태주,박주현 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.51 No.-
Conjugated polymer nanowires have recently attracted attention as new organic photocatalysts withimproved photoexcited charge-carrier lifetime capable of efficient energy harvesting from sunlight. However, most methods to prepare the nanowires have focused on crystalline conjugated polymers,thereby limiting the number of usable polymer structures. In this study, we present a method forpreparing nanowires of amorphous conjugated polymers to expand their applicability as photocatalysis. We demonstrate a nanowire fabrication process that utilizes an alkylbenzoic acid. At a specificconcentration, the amphiphilic alkylbenzoic acid forms wire morphologies when its organic solution isadded to an aqueous solution, partitioning the organic solution inside the wires and the outside aqueoussolution. When the amorphous conjugated polymer in the organic solution is added, the conjugatedpolymers are located in the wires and form conjugated polymer nanowires upon removal of the organicsolvent.
채정완,배나래찬,노주란,김태형,유필진,신태주,박주현 한국고분자학회 2019 Macromolecular Research Vol.27 No.4
We present a methodology to prepare a hybrid photocatalyst based on conjugated polymer nanoparticles (CPNs) by electrostatically adsorbing TiO2 nanoparticles on the surfaces of the CPNs to achieve synergetic effects of efficient light-harvesting by CPNs and photocatalysis by TiO2 nanoparticles by taking advantages of the energy transfer from the CPNs to TiO2. Positive surface charges on CPNs were introduced by adding a portion of cationic amphiphile during the preparation of CPNs using poly(3-hexylthiophene) and a phospholipid via a phase-separated film shattering process. Then, anionic TiO2 nanoparticles were synthesized and adsorbed on the positively charged surfaces of CPNs by electrostatic attraction. The resulting hybrid nanoparticles showed efficient visible-light active photocatalysis which was confirmed by the degradation of methylene blue with visible-light irradiation.