This study strived to improve the photocatalytic activity by using liquid-phase non-thermal plasma (LPNTP) technology for preparing N-doping TiO(2) as well as to separate/recover the N-dope TiO(2) particles by using ceramic ultrafiltration membrane process. The yellow color N-doped TiO(2) photocatalysts, obtained through the LPNTP process, were characterized with UV-Vis spectroscopy, X-ray diffraction (XRD), and electron spectroscopy for chemical analysis (ESCA). The UV-Vis spectrum of N-doped TiO(2) showed that the absorption band was shifted to 439 nm and the band gap was reduced to 2.82 eV. The structure analysis of XRD spectra showed that the peak positions and the crystal structure remained unchanged as anatase after plasma-treating at 13.5 W for 40 min. The photocatalytic activity of N-doped TiO(2) was evaluated by azo dyes under visible light, and 63% of them was degraded after 16 hours in a continuous-flow photocatalytic system. For membrane separation/recover system, the recovery efficiency reached 99.5% after the ultrafiltration had been carried out for 90 min, and the result indicated that the photocatalyst was able to be separated/recovered completely.

Homeless people typically experience multiple social exclusions that severely affect their well-being. Therefore, based on clients’ participation, this study aims to explore what homeless people facing multifaceted social exclusion perceive as their biggest challenges in daily life, thereby rethinking the current homelessness policies and practices in Taiwan. Using the photovoice method, six homeless people living in the vicinity of the Taipei Main Station participated in the three-stage project. They took photographs to illustrate the main life difficulties and satisfactions they faced and engaged in dialogues through the images presented in the photographs. Through the photovoice workshops, ‘poor sleep’ was identified as their major common predicament, and all participants responded with strong emotions about the dire need to sleep well. In the final stage, homeless participants proposed the ‘Sleep First’ solution based on their own perspectives, which supported the philosophy of the ‘Housing First’ approach to addressing homelessness.

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