Iodine adulterated photocatalytic multicrystal material possessing photocatalytic performance under visible light

A crystalline material, photocatalytic technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low quantum yield, short life, low photocatalytic activity, etc. Catalytic activity, improve photon efficiency, achieve full-frequency absorption effect
CN1259130CInactive Publication Date: 2006-06-14SHANGHAI JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI JIAOTONG UNIV
Publication Date
2006-06-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

An iodine-doped photocatalytic polycrystalline material capable of photocatalytic activity under visible light conditions belongs to the field of inorganic nano photocatalytic materials. It is composed of the following three elements: titanium, oxygen, and iodine, and its weight percentage is: the content of titanium accounts for 54.70%-59.95%, the content of oxygen accounts for 35.30%-39.95%, and the content of iodine accounts for 0.10%-10.00%. Iodine exists in the photocatalytic crystal material in the form of non-bonding and bonding. When it exists in the form of bonding, iodine and titanium exist in the crystal lattice of the photocatalytic crystal material in the form of Ti-I chemical bonds; When the bond mode exists, iodine is intercalated in the interstices of the photocatalytic crystal material. The present invention reduces its original bandgap width to the extent that visible light (400-800nm) can be used by doping iodine, and the material of the present invention has a bandgap width that can also be excited by visible light irradiation, thereby realizing a visible light The full-frequency absorption of the modified TiO can be significantly improved 2 The photon quantum efficiency of the material.
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Description

technical field

[0001] The invention relates to a crystal material, in particular to an iodine-doped photocatalytic polycrystalline material with photocatalytic activity under visible light conditions, and belongs to the field of inorganic nano photocatalytic materials. Background technique

[0002] Titanium dioxide has good photocatalytic activity and photoelectric performance, and has broad application prospects in many fields such as photocatalytic degradation of organic pollutants in water and air, photoelectrochemical solar cells, and photolysis of water to produce hydrogen. However, in practical applications, titanium dioxide as a photocatalyst still has some defects: on the one hand, TiO 2 The lifetimes of photogenerated electrons and photogenerated holes are extremely short, and the two are easy to recombine, resulting in TiO 2 The quantum yield is low and the photocatalytic activity is not high; on the other hand, TiO 2 The band gap is wide, and the excitation lig...

Claims

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