Polymer Electrode With Naphthalene Dye Preparation And Properties Of

In this thesis, firstly for the purpose of replacing the Pt counter electrode in thedye-sensitized solar cell, we proposed the polymer/multi-walled carbon nanotubes(MWCNT) electrodes. Secondly, novel dyes of1,8-naphthalimide compounds withfluorescence capability were synthesized. And the dyes could be used as molecularprobes.We prepared the polythiophene/MWCNT (PTh/MWCNT) electrode and used it indye-sensitized solar cell (DSSC). Firstly, we electrodeposited MWCNT film by theelectrophoretic deposition. Then we electrodeposited PTh film on the MWCNT layer bycyclic voltammetry method. There is a typical three dimensional network of compositefilms, with the PTh penetrating the MWCNT net and growing on MWCNT substrate.The PTh film on MWCNT was composed of spherical and full of porous which not onlyimproved the roughness and specific surface area of MWCNT, but also improved theelectronic transmission capacity of PTh. The cyclic voltammetry results indicated thatthe composite electrodes have stronger electrocatalytic activity toward the iodine ion.And the DSSCs using the composite film electrode showed excellent photovoltaicperformance.We prepared the polypyrrole/MWCNT (PPy/MWCNT) electrode with the methodof preparation of PTh/MWCNT electrode. And tested its capability.The excellent photovoltaic properties, simple preparation procedure andinexpensive cost allow polymer composite film electrodes to be a credible alternative toPt used in DSSC.The novel dyes of1,8-naphthalimide compounds were designed and synthesized.As the special molecular structure,1,8-naphthalimide can be modified on its naphthalene ring and imide. The dyes could detect F－and OH~－with intramoleclarcharge transfer (ICT) mechanism. The fluorescence intensity changed on thedependance of concentration of F－. But with the OH~－being added, the fluorescence ofschiff bases changed. All dyes have the capability response on F－. Further, schiff baseshave the capability response on OH~－. The dyes could detect H~＋with photo-inducedelectron transfer (PET) mechanism. The fluorescence intensity changed on the thedependance of concentration of H~＋. The dyes showed fluorescence suppression in highconcentration with H~＋.