Bromine 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 short life, limited visible light utilization, low photocatalytic activity, etc.
CN1259129CInactive 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

A bromine-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 bromine, and its weight percentage is: the content of titanium accounts for 54.55%-59.90%; the content of oxygen accounts for 35.45%-40.00%; the content of bromine accounts for 0.10%-10.00%. The coexistence of non-bonding and bonding exists in photocatalytic polycrystalline materials. When existing in the form of bonding, bromine and titanium elements exist in the lattice of photocatalytic crystal materials in the form of Ti-Br chemical bonds; in the form of non-bonding When the mode exists, bromine is intercalated in the interstices of the photocatalytic crystal material. The present invention reduces its original forbidden band width to the extent that visible light (400-800nm) range can be used by bromine doping, because the material of the present invention has the forbidden band width that can also be excited by visible light irradiation, thereby realizing the visible light It has high catalytic activity under visible light.
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Description

technical field

[0001] The invention relates to a crystal material, in particular to a bromine-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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