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Titania photocatalytic compounds and methods of making the same

A technology of titanium oxide and compounds, applied in the field of chemistry, can solve problems such as not being suitable for improving the photocatalytic activity of titanium dioxide

Inactive Publication Date: 2018-12-07
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the cost and conduction band position of noble metals and transition metals are not suitable for improving the photocatalytic activity of titania

Method used

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  • Titania photocatalytic compounds and methods of making the same
  • Titania photocatalytic compounds and methods of making the same
  • Titania photocatalytic compounds and methods of making the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Embodiment 1: the synthesis of compound A

[0086] A 50% by weight aqueous solution of TYZOR LA (25 mL, Sigma Aldrich, St. Louis, MO, SA) was preheated in a furnace (Barnstead Thermolyne 47900, Dubuque, IA, USA) to 350 °C for about 20 to 30 minutes to burn And formed a large amount of black powder. After gas was no longer observed, the resulting powder was transferred without crushing into a large glass Petri dish (100 x 50), heated to 475°C and held at this temperature for about 1 hour. Next, the above Petri dish was cooled to room temperature to yield a pale yellow powder. The pale yellow powder (compound A) was manually pulverized using a pestle and mortar for characterization and photocatalytic evaluation.

Embodiment 2

[0087] Embodiment 2: the synthesis of compound B, C and D

[0088] Comparative compound A (P25 Titania) was obtained from Evonik (Evonik Degussa Corp., Parsippany, NJ, USA). Compound B, Compound C, and Compound D were prepared in a similar manner to Example 1, except that the amount of TYZOR LA was varied and additional precursor was added to TYZOR LA prior to combustion, as shown in Table 1 below:

[0089] Table 1: Precursor materials of the compounds of Example 1 and Example 2

[0090]

[0091] *Comparative compound A is Titania P25 from Evonik.

Embodiment 3

[0092] Embodiment 3: the synthesis of compound E to AB

[0093] Compounds E to AD were prepared in a similar manner to Example 1, except that the amount of TYZOR LA was varied and additional precursors were added prior to combustion as shown in Table 2 below. For compounds AC and AD, noble metal compounds were included as additional precursors to obtain catalytic compositions with noble metals.

[0094] Table 2: Precursor materials for the compounds of Example 1 and Example 2

[0095]

[0096]

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Abstract

The invention relates to titania photocatalytic compounds and methods of making the same. Disclosed herein are titania photocatalysts, titania photocatalytic compositions, and methods of making the same. The photocatalysts may, for example, be represented by the formula of (Ti1_rMr)(02-x-yCxNy), where M, r, x, are y defined in the specification. The photocatalysts may, in some embodiments, providesuperior photocatalytic activity relative to titania. Also disclosed are methods making the photocatalysts. The method may provide economical techniques for obtaining the titania photocatalysts.

Description

[0001] This application is a divisional application of the Chinese invention patent application 201380005438.2 (PCT application number PCT / US2013 / 021480) with the filing date of January 14, 2013, and the title of the invention is "Titanium dioxide photocatalytic compound and its manufacturing method". [0002] Related Application Cross Reference [0003] This application claims priority from US Application No. 61 / 587,889, which is hereby incorporated by reference in its entirety. Background of the invention [0004] field [0005] The present application relates to the field of chemistry, and in particular to photocatalytic materials. [0006] describe [0007] In 1972, Fujishima and Honda first discovered the photocatalytic activity of titanium dioxide. Since then, titanium dioxide has been used as a first-generation catalyst for photo-assisted decontamination of organic pollutants in aqueous and atmospheric systems. Much research work has been directed at improving Ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/00
CPCB01J37/086B01J37/088B01J21/063B01J23/06B01J23/14B01J23/626B01J23/66B01J27/22B01J27/24B01J35/39B01J19/127B01J19/123B01J19/128
Inventor 伊卡姆巴拉姆·萨姆班丹拉贾什·穆克尔吉福村卓哉
Owner NITTO DENKO CORP