Homogeneous catalytic fiber coatings and methods of preparing same

A method for preparing a catalytically active fiber composition comprising:

• preparing a coating solution or mixture comprising:
• a salt or a colloid of a catalytically active metal, and
• water, an organic solvent, or a combination thereof;
• coating an inorganic fiber substrate with the coating solution or mixture;
• drying the coated inorganic fiber substrate at ambient conditions, by freeze drying, under controlled conditions, with infrared radiation, or with microwave radiation to reduce migration of the catalytically active metal on the inorganic fiber substrate;
• and
• calcining the dried, coated inorganic fiber substrate.

A method for preparing a catalytically active fiber composition comprising:

• preparing a coating solution comprising:
• a salt of a catalytically active metal,
• water, and
• an organic solvent,
• controlling solubility of the salt in the coating solution by adjusting an amount of the salt, the water, or the organic solvent in the coating solution;
• coating an inorganic fiber substrate with the coating solution;
• drying the coated inorganic fiber substrate in a steam oven;
• and
• calcining the dried, coated inorganic fiber substrate.

A method for preparing a catalytically active fiber composition comprising:

• preparing a first coating solution or mixture comprising:
• a salt or a colloid of a catalytically active metal, and
• water, an organic solvent, or a combination thereof;
• placing an inorganic fiber substrate into a container;
• coating the inorganic fiber substrate with the first coating solution or mixture by applying a vacuum to the container;
• drying the coated inorganic fiber substrate;
• and
• calcining the dried, coated inorganic fiber substrate.