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The tungstophosphoric heteropolyacid (H5PW11TiO40) contained titanium was prepared and then characterized by FT-IR, UV, XRD and TG/DSC analysis, which revealed that the H5PW11TiO40 heteropolyacid was Keggin structure and one H5PW11TiO40 heteropolyacid molecule contained fifteen crystal water molecules (H5PW11TiO40•15H2O). And the tungstophosphoric heteropolyacid (H5PW11TiO40) contained titanium could be used as a green catalyst for cleaner reactions.

There are various electrochemical approaches to save energy, mostly by means of equipment improvement coupled with other water treatment technologies. Replacement of DC power with pulse power, modified reactor coupled with photocatalysis can decrease cost. But more or less additional input is developed, or infrastructure has to be replaced. In this paper, an N-Step electrochemical reactor, based on stage reaction modeling, is put forward. On the basis of not changing equipment investment and by adjustment of the operating current density at different levels, power consumption decreases. This model develops a foundation of electrochemical water treatment technology for the engineering application.