A method for preparing highly active tio2 nanometer single crystals by using waste electrolyte

Abstract

The invention discloses a method for preparing a high activity TiO2 nano-single crystal from a waste electrolyte solution. The method is characterized by including the steps of: subjecting a titanium sheet to a ''high voltage-low voltage-constant voltage'' interactive anodic oxidation process to obtain the waste electrolyte solution; carrying out concentration, microfiltration, purification and extraction on the waste electrolyte solution to obtain white powder; calcining the white powder at 300-800DEG C for 1-10h to obtain an initial TiO2 nano-single crystal; and cleaning and drying the initial TiO2 nano-single crystal, thus obtaining the high activity TiO2 nano-single crystal. The method provided by the invention takes the waste electrolyte solution generated by the anodic oxidation technology as a raw material, and prepares the anatase type high activity TiO2 nano-single crystal containing {001} crystal planes through one-step synthesis. The method is simple, and performs effective resource recycling on the toxic and harmful substances generated by the anodic oxidation technology, thus having significant economic and environmental benefits.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a method for preparing highly active and environment-friendly TiO by using toxic and harmful anodic oxidation waste electrolyte 2 Nano single crystal method. Background technique [0002] As one of the most important semiconductor materials, TiO 2 It is widely used in many fields. Since the discovery of the Honda-Fujishima photo-splitting phenomenon, TiO 2 It has become one of the most potential photocatalysts due to its advantages of stability, non-toxicity and relatively low cost. On the one hand, TiO 2 The influence of the nano-morphology and micro-structure on the physicochemical properties is crucial. Vertically grown and well-aligned 1D TiO prepared by anodic oxidation 2 Nanotube arrays, which exhibit excellent properties due to their unique ordered structures, are widely used in many fields and become a promising new nanostructured material. Studies have shown ...

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Problems solved by technology

However, these reported preparation methods are either complicated in preparation process and time-consuming, or have too high requirements on precursors, which is not conducive to further experimental promotion. Therefore, it is urgent to research and develop a simple preparation, less difficult operation, TiO with practical industrial application prospects 2 Nano single crystal doping technology

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