阅读说明：本技术 一种具有磷选择性的催化电极及其制备方法 (Catalytic electrode with phosphorus selectivity and preparation method thereof ) 是由 戴红 徐杉 于 2020-03-20 设计创作，主要内容包括：本发明主要提供了一种具有磷选择性的催化电极材料,其特征在于,该电极是由Ti基体向外形成IrO<Sub>2</Sub>-RuO<Sub>2</Sub>多个过渡渐变涂层,最外层和次外层为以RuO<Sub>2</Sub>分别掺有Ce、Ni的涂层,该电极涂层的总厚度为0.1mm；所述RuO<Sub>2</Sub>为催化活性作用,所述IrO<Sub>2</Sub>为辅助导电和催化作用。本发明电极对低浓度可溶性磷具有高效降解效能,处理后出水可达到《地表水环境质量标准》(GB3838-2002)III类标准,可有效解决污水中低浓度磷无污染降解的技术难题。(The invention mainly provides a catalytic electrode material with phosphorus selectivity, which is characterized in that IrO is formed outwards from a Ti substrate 2 ‑RuO 2 Multiple transitional graded coatings with RuO as outermost layer and secondary outer layer 2 The coating is respectively doped with Ce and Ni, and the total thickness of the electrode coating is 0.1 mm; the RuO 2 For catalytic activity, the IrO 2 To assist in electrical conduction and catalysis. The electrode has efficient degradation efficiency on low-concentration soluble phosphorus, the treated effluent can reach the III-type standard of surface water environment quality standard (GB3838-2002), and the technical problem of pollution-free degradation of low-concentration phosphorus in sewage can be effectively solved.)

1. A catalytic electrode material with phosphorus selectivity is characterized in that the electrode is formed by forming IrO outwards from a Ti substrate₂-RuO₂Multiple transitional graded coatings with RuO as outermost layer and secondary outer layer₂The coating is respectively doped with Ce and Ni, and the total thickness of the electrode coating is 0.1 mm; the RuO₂For catalytic activity, the IrO₂To assist in electrical conduction and catalysis.

2. The catalytic electrode material with phosphorus selectivity as claimed in claim 1, wherein RuO₂Is 1-2 μm thick and is IrO₂The monolayer thickness of (2) is 0.5-1 μm; the outermost layer is RuO₂-CeO₂The second outer layer is RuO₂-NiO(Ni₂O₃) The thickness of the net structure layer is 1 μm.

3. A preparation method of a catalytic electrode material with phosphorus selectivity is characterized by comprising the following steps:

using Ti with the thickness of 2.0mmTi as a matrix, and performing surface activation modification by HF to form TiH₂The film is activated and the film is dried,

with ruthenium trichloride (RuCl)₃·3H₂O) or ammonia (NH) chlororuthenate₄)₂RuCl₆Is RuO₂The precursor of (a) is prepared,

with chloroiridic acid H₂IrCl₆·6H₂O is IrO₂The precursor of (a) is prepared,

with cerium nitrate [ Ce (NO)₃)₃·6H₂O]Is CeO₂The precursor of (a) is prepared,

with nickel nitrate [ Ni (NO)₃)₂·6H₂O]Is NiO (Ni)₂O₃) The precursor of (a) is prepared,

coating-thermal decomposition of RuO₂、IrO₂Is coated on a Ti substrate,

further adopting a dipping-low temperature thermal decomposition method to carry out the reaction on CeO₂And NiO (Ni)₂O₃) Application to RuO₂The surface is formed with a net-shaped coating structure.

4. Use of a catalytic electrode with phosphorus selectivity for the manufacture of an anode in electrocatalytic water treatment.

Technical Field

The invention relates to the field of semiconductor materials, in particular to a catalytic electrode with phosphorus selectivity and a preparation method thereof.

Background

Nitrogen and phosphorus are main factors causing water quality eutrophication, and the removal, prevention and control of phosphorus in sewage are one of important directions for water environment treatment.

The conventional electrochemical water treatment dephosphorization technology mainly adopts an electric flocculation method, wherein iron and aluminum are used as anodes of electrodes, and the iron and the aluminum are consumed in the water treatment process and enter water in the form of compounds to cause secondary pollution.

In the electrocatalysis water treatment technology, the electrodes can not generate chemical reaction, thereby causing no secondary pollution of water and being a clean water treatment technology.

No titanium-based ruthenium-based catalytic electrode material for selective adsorption of phosphorus in sewage has been found so far.

Disclosure of Invention

The invention mainly provides a catalytic electrode material with phosphorus selectivity and a preparation method thereof, and solves the technical problems in the background technology.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a catalytic electrode material with phosphorus selectivity is prepared by forming IrO from Ti substrate₂-RuO₂Multiple transitional graded coatings with RuO as outermost layer and secondary outer layer₂The coating is respectively doped with Ce and Ni, and the total thickness of the electrode coating is 0.1 mm;

the RuO₂For catalytic activity, the IrO₂To assist in electrical conduction and catalysis.

RuO₂Is 1-2 μm thick and is IrO₂The thickness of (A) is 0.5-1 μm,

the outermost layer is RuO₂-CeO₂The second outer layer is RuO₂-NiO(Ni₂O₃) The thickness of the net structure layer is 1 μm.

The invention provides a preparation method of a catalytic electrode material with phosphorus selectivity, which comprises the following steps:

using Ti with the thickness of 2.0mmTi as a matrix, and performing surface activation modification by HF to form TiH₂The film is activated and the film is dried,

with ruthenium trichloride (RuCl)₃·3H₂O) or ammonia (NH) chlororuthenate₄)₂RuCl₆Is RuO₂The precursor of (a) is prepared,

with chloroiridic acid H₂IrCl₆·6H₂O is IrO₂The precursor of (a) is prepared,

with cerium nitrate [ Ce (NO)₃)₃·6H₂O]Is CeO₂The precursor of (a) is prepared,

with nickel nitrate [ Ni (NO)₃)₂·6H₂O]Is NiO (Ni)₂O₃) The precursor of (a) is prepared,

by coatingThermal decomposition of RuO₂、IrO₂Is coated on a Ti substrate,

further adopting a dipping-low temperature thermal decomposition method to carry out the reaction on CeO₂And NiO (Ni)₂O₃) Application to RuO₂The surface is formed with a net-shaped coating structure.

The invention provides application of a catalytic electrode with phosphorus selectivity in manufacturing an anode in electrocatalytic water treatment.

Compared with the prior art, the invention has the beneficial effects that:

1. designing and producing an electrode material by the idea of forming an enhanced p-type semiconductor ruthenium oxide;

2. by using IrO₂With RuO₂Formation of gradient and multi-layer structure on Ti substrate to strengthen RuO₂The RuO is constructed on the surface of the electrode by doping Ce and Ni₂-CeO₂And RuO₂-NiO(Ni₂O₃) The mesh structure realizes the selective adsorption of phosphorus, thereby removing phosphorus by rapid oxidation;

3. the electrode has efficient degradation efficiency on low-concentration soluble phosphorus, the treated effluent can reach the III-type standard of surface water environment quality standard (GB3838-2002), and the technical problem of pollution-free degradation of low-concentration phosphorus in sewage can be effectively solved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Detailed Description

While several embodiments of the present invention will be described below in conjunction with embodiments to facilitate understanding of the invention, the present invention may be embodied in different forms and is not limited to the embodiments described herein, but rather, these embodiments are provided so that this disclosure will be thorough and complete.