Preparation of efficient titanium containing photocatalysts by recycling inorganic sludges

Shou Heng Liu, Tzu Huan Su, Chi Hong Kuok, Wen Ting Tang, Wei Xing Lin, Yi Hsin Tang

Research output: Contribution to conferencePaper

Abstract

The natural resources on the earth are overused and consumed rapidly. Taiwan is short of nature resources and most resource was imported from oversea. Thus, how to efficiently recycle the resource become one of the most important issue in the recent years. In this work, different methods to fabricate TiO2 supported on waste sludge (ESF) are investigated. Furthermore, various nitrogen sources are used to prepare the N doped TiO2-ESF composites. In the experiments, the loading of TiO2 onto ESF to prepare well dispersed active sites on ESF in order to enhance the efficiency in the process of synthesis TiO2-ESF composite. In addition, the effects of different synthesis methods and the amounts of ESF addition are discussed. XRD results show that TiO2 crystal structures still remain anatase phase after heat treating at 723 K whether the ESF is added or not. Among all the photocatalysts, the TBE-1.5 has the best photocatalysis efficiency under simulated sunlight and visible light. In the doping nitrogen experiments, the different nitrogen sources (NH4OH, Ethylenediamine, Urea) are used to synthesize nitrogen doping TiO2. The results show that NH4OH as the nitrogen source have best photocatalysis efficiency. Afterwards, the NH4OH is used as the nitrogen source to synthesize TiO2ESF doping nitrogen (N2TBE-1.5). The composites are characterized by TEM, UV-vis, BET, XPS analysis. The results indicate that the preparation of N doped TiO2ESF photocatalysts is successful. Under visible light situation, the photocatalysis efficiency of MB can reach 39.6% which is better than commercialized photocatalysts P25 (3.6%).

Original languageEnglish
Publication statusPublished - 2017 Jan 1
Event14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017 - Sapporo, Hokkaido, Japan
Duration: 2017 Sep 262017 Sep 29

Conference

Conference14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017
CountryJapan
CitySapporo, Hokkaido
Period17-09-2617-09-29

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All Science Journal Classification (ASJC) codes

  • Environmental Science(all)

Cite this

Liu, S. H., Su, T. H., Kuok, C. H., Tang, W. T., Lin, W. X., & Tang, Y. H. (2017). Preparation of efficient titanium containing photocatalysts by recycling inorganic sludges. Paper presented at 14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017, Sapporo, Hokkaido, Japan.