Method for preparing LaTiO2N high-efficiency photoelectrode material
A technology of oxynitride and photoelectrode, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problem of low efficiency of solar energy conversion to hydrogen energy, and achieve the effect of improving hydrogen energy efficiency
Inactive Publication Date: 2014-11-19
NANJING UNIV
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Lanthanum titanate oxynitride (LaTiO 2 N) Can absorb visible light up to 600nm [A.Kasahara, K.Nukumizu, G.Hitoki, J.N.Kondo, M.Hara, H.Kobayashi, K.Domen, J.Phys.Chem.A, 106, 6750-6753( 2002)], the theoretical efficiency of solar energy conversion to hydrogen energy is as high as 16%, but the actual efficiency of solar energy conversion to hydrogen energy is very low
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.
[0022] Efficient photoelectrode material LaTiO 2 The preparation method of N comprises the following steps:
[0023] (1) Preparation of LaTiO by solid-state reaction method 2 Precursor of N La 2 Ti 2 o 7 , according to La 2 Ti 2 o 7 The molar ratio of La and Ti is weighed La 2 o 3 and TiO 2 ;
[0024] (2) Mix the above raw materials evenly and grind them thoroughly; grind them until the particle size is mainly distributed between 1 micron and 4 microns;
[0025] (3) In the solid phase reaction method, the mixed raw materials are calcined at 800°C, 900 or 1000°C for 6h, 10h, 12h, 20h, and calcined under ordinary air conditions, or under weak vacuum conditions Calcined, then cooled to room temperature. Carry out the second step of grinding, and the second step of grinding is also until the particle size is mainly distributed in 1 micron to 4 ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| quantum efficiency | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a method for preparing a LaTiO2N high-efficiency photoelectrode material. The method comprises the following steps of: preparing a precursor La2Ti2O7 of LaTiO2N by using a solid-phase reaction method, and weighing La2O3 and TiO2 according to a molar rate of La to Ti of the La2Ti2O7; uniformly mixing and sufficiently grinding the La2O3 and TiO2; calcining the uniformly mixed raw material for 6-20h at the temperature of 800-1000 DEG C, then cooling to room temperature, grinding and calcining the grinded raw material for 6-20h again at the temperature of 1100-1400DEG C; depositing the LaTiO2N particles on a conductive glass (FTO (Fluorine Doped Tin Oxide)) substrate by using an electrophoretic deposition method, and drying in the air to obtain a LaTiO2N particle film; and then dropwise adding a TiC14 methanol solution on the prepared LaTiO2N particle film, and carrying out thermal treatment for 10-60min at 300-700 DEG C in an ammonia atmosphere to obtain the LaTiO2N photoelectrode.
Description
technical field [0001] The invention relates to a method for preparing lanthanum titanate oxynitride (LaTiO 2 N) Methods for efficient photoelectrode materials. Background technique [0002] The world today is confronted with two major problems of energy shortage and environmental pollution, which restrict the sustainable development of human beings. The development of clean and renewable energy is a top priority. The energy that the sun irradiates on the earth in a year is nearly ten thousand times the total energy consumed by human beings in a year. From the perspective of long-term development, when mineral energy is facing depletion and the environment is seriously deteriorating, solar energy will definitely play an important role in the future energy structure because of its advantages such as cleanness, non-pollution, wide distribution, inexhaustibility, and inexhaustibility. character of. However, solar energy has disadvantages such as low energy density, strong d...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/04C25B9/04C25B1/04
CPCY02E60/366Y02E60/36
Inventor 李朝升冯建勇吕浩方涛祝梅邹志刚
Owner NANJING UNIV