TITANATE PHOTOCATALYST
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Abstract
The invention relates to a titanate photocatalyst of formula (I): HmAx-mTiyOzDn (I) wherein: A is a cation selected from the group consisting of lithium, sodium, potassium, rubidium, caesium and francium; D is a dopant selected from the group consisting of boron, carbon, nitrogen, fluorine, sulphur, phosphorus and iodine; x is a value between 0 and 8; y is a value greater than 0 and less than or equal to 8; n is a value greater than 0 and less than or equal to 8; z is a value greater than 0 and less than or equal to 8; and m is a value between 0 and 8. The invention also relates to method of production and uses of the titanate photocatalyst.
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Citations
55 Claims
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1-35. -35. (canceled)
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36. A titanate photocatalyst of formula (I):
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HmAx-mTiyOzDn
(I)wherein; A is a cation selected from the group consisting of lithium, sodium, potassium, rubidium, caesium and francium; D is a dopant selected from the group consisting of boron, carbon, nitrogen, fluorine, sulphur, phosphorus and iodine; x is a value between 0 and 8; y is a value greater than 0 and less than or equal to 8; n is a value greater than 0 and less than or equal to 8; z is a value greater than 0 and less than or equal to 8; and m is a value between 0 and 8. - View Dependent Claims (37, 38, 39)
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40. A titanate photocatalyst of formula (Ia):
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AxTiyOzDn
(Ia)wherein; A is a cation selected from the group consisting of lithium, sodium, potassium, rubidium, caesium and francium; D is a dopant selected from the group consisting of boron, carbon, nitrogen, fluorine, sulphur, phosphorus and iodine; x and y are independently a value greater than 0 and equal to or less than 8; and n and z are independently a value between 0 and 8. - View Dependent Claims (41, 55)
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42. A method of producing a titanate photocatalyst of formula (Ia),
AxTiyOzDn-
(Ia)wherein; A is a cation selected from the group consisting of lithium, sodium, potassium, rubidium, caesium and francium; D is a dopant selected from the group consisting of boron, carbon, nitrogen, fluorine, sulphur, phosphorus and iodine; x and y are independently a value greater than 0 and equal to or less than 8; and n and z are independently a value between 0 and 8. including the steps of; a. forming a mixture comprising at least one cation donor precursor and at least one titanate precursor; b. calcining the mixture to form a cation intercalated titanate; c. contacting the cation intercalated titanate with a dopant and calcining to form a photocatalyst of formula (Ia). - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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53. A method of producing a layered titanate photocatalyst of formula (Ib)
HmAx-mTiyOzDn-
(Ib)where m, x, y, z and n are as previously defined, including the steps of; placing the photocatalyst of formula (Ia) as represented below;
AxTiyOzDn
(Ia)where x, y, z and n are as previously defined, in an acidic solution to form a photocatalyst of formula (Ib); and filtering, separating and drying the titanate photocatalyst (Ib). - View Dependent Claims (54)
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Specification