MoO3-SnO2 base doped nano composite metal oxide and method for producing the same

The invention relates to a nanometer composite metal oxide with doped MoO3-SnO2 base and preparing method thereof; the chemical general equation of the nanometer composite metal oxide with doped MoO3-SnO2 base can be expressed as: Y-MoO3-SnO2, wherein, the mole ratio of Sn/Mo is 0.1 to 10 : 1, Y represents the doped metal oxide, and the quality ratio of the metal elements of the Y and the Sn is 0 to 0.05 :1; the invention adopts a fractional precipitation method, comprising the following steps: Alpha-stannic acid precipitate is prepared by pink salt, the filtered precipitate is scattered in the water so as to prepare Alpha-stannic acid sol the concentration of which is 0.02 to 0.2M, molybdenum salt solution is added by dipping, the pH value is regulated till the precipitation is completed, and the nanometer composite powder is prepared by drying and roasting; the powder is prepared into a sensor element which has higher sensitivity for NO2, CO and C2H5OH, the sensitivity and the selectivity ...

W-Sn nano composite metal oxide gas-sensing material and preparation method thereof

The invention relates to a W-Sn nanometer composite metal oxide gas-sensing material and a preparation method thereof. The composite metal oxide is a compound of WO3 and SnO2, which is expressed as WO3-SnO2, wherein, the Sn/W molar ratio is 1-20 to 1, the diameter distribution is 5.0-30.0nm, and the specific surface area is 15.0-60.0m<2>/g. The preparation method of the composite metal oxide is to adopt a fractional precipitation method to make alpha-stannic acid precipitate with tin salts to be dispersed in water in a certain concentration, drop tungsten solution of the Sn/W molar ratio and regulate the pH value until the precipitation is finished completely. A precursor after being dried is roasted at 400-1000 DEG C to produce nano composite powder. The powder is made into a sensor component, which has the advantages of high adsorption properties and high sensitively to NO2 and high selectivity to reducing gas.

One-dimensional zinc oxide nanometer material and preparation method thereof

The invention provides a one-dimensional zinc oxide nanometer material and a preparation method thereof. The method comprises the steps of: performing a hydro-thermal reaction of a zinc salt solution and a sodium hydroxide solution; and successfully obtaining the one-dimensional zinc oxide nanometer material with high crystallinity by adding a surfactant and controlling reaction conditions. The diameter of one-dimensional nanometer zinc oxide is between 100 and 300nm, and the length is between 1 and 6mu m. Compared with the prior method for preparing the one-dimensional nanometer zinc oxide, the method has the advantages of low cost, simple operation, low energy consumption, high crystallinity of products and the like. The nanometer zinc oxide material has excellent gas sensitivity on gas such as methane, carbon monoxide, nitrogen dioxide and the like, and is a good gas-sensitive material.

Quantum size zinc oxide and preparation method and application thereof

The invention provides quantum size zinc oxide, a preparation method thereof and application of the quantum size zinc oxide used as a gas-sensitive material. The method comprises the following steps of: performing an ethanol heat reaction of solution of zinc salt and solution of sodium hydroxide, and successfully preparing a zinc oxide quantum dot material with high crystallinity by adding a surface modification agent and controlling reaction conditions. The dimensions of quantum dots of the zinc oxide are 1 to 10nm. Compared with the conventional method for preparing the quantum dots of the zinc oxide, the method has the advantages of low cost, low energy consumption, high product crystallinity and the like and is easy to operate. A prepared nanometer zinc oxide material has excellent gas sensitivity to nitrogen dioxide gas, and is a good gas-sensitive material.

Tin oxide nanomaterial and preparation method thereof

The invention provides a tin oxide nanomaterial and a preparation method thereof. One-dimensional tin oxide nanomaterial with high crystallization degree and good appearance is successfully prepared by performing solvothermal synthesis on tin chloride and alkali serving as raw materials in solution of ethanol, wherein the diameter of the one-dimensional tin oxide nanomaterial is 50 to 300nm and the length is 1 to 8 mu m. Compared with the conventional method for preparing the one-dimensional tin oxide nanomaterial, the method adopted by the invention has the advantages of good appearance of the product, high crystallization degree of crystals, low industrialization cost, simple operation and high product yield. The prepared tin oxide nanomaterial has high gas sensitivity to carbon monoxide gas and is a good gas-sensitive material.

W-Sn nano composite metal oxide gas-sensing material and preparation method thereof

Nanometer gas-sensing material of ternary composite metal oxide and production thereof

MoO3-SnO2 base doped nano composite metal oxide and method for producing the same

The invention relates to a nanometer composite metal oxide with doped MoO3-SnO2 base and preparing method thereof; the chemical general equation of the nanometer composite metal oxide with doped MoO3-SnO2 base can be expressed as: Y-MoO3-SnO2, wherein, the mole ratio of Sn/Mo is 0.1 to 10 : 1, Y represents the doped metal oxide, and the quality ratio of the metal elements of the Y and the Sn is 0to 0.05 :1; the invention adopts a fractional precipitation method, comprising the following steps: Alpha-stannic acid precipitate is prepared by pink salt, the filtered precipitate is scattered in the water so as to prepare Alpha-stannic acid sol the concentration of which is 0.02 to 0.2M, molybdenum salt solution is added by dipping, the pH value is regulated till the precipitation is completed, and the nanometer composite powder is prepared by drying and roasting; the powder is prepared into a sensor element which has higher sensitivity for NO2, CO and C2H5OH, the sensitivity and the selectivity ...

Quantum size zinc oxide and preparation method and application thereof

Nanocrystalline metal oxide with p-n composite structure, preparation method and application of nanocrystalline metal oxide

The invention provides nanocrystalline metal oxide with a p-n composite structure and a preparation method of the nanocrystalline metal oxide. The nanocrystalline metal oxide with the p-n composite structure is prepared from nanofiber which is formed by binding SnO2 nano particles and Co3O4 nano particles in series, has the diameter of 100-200nm and is indicative of n-SnO2@p-Co3O4. The n-SnO2@p-Co3O4 composite nanofiber is prepared by means of electrostatic spinning, cobalt salt and tin salt are dissolved into N,N-dimethylformamide (DMF) to prepare a spinning solution, and the components are spun in electrostatic spinning equipment and are calcined to obtain n-SnO2@p-Co3O4 nanofiber. A gas sensor is made of the n-SnO2@p-Co3O4 nanofiber material, so that the gas sensor is high in sensitivity on low-concentration CO at low operation temperature and is suitable for detecting trace of carbon monoxide in environment.

One-dimensional zinc oxide nanometer material and preparation method thereof

The invention provides a one-dimensional zinc oxide nanometer material and a preparation method thereof. The method comprises the steps of: performing a hydro-thermal reaction of a zinc salt solution and a sodium hydroxide solution; and successfully obtaining the one-dimensional zinc oxide nanometer material with high crystallinity by adding a surfactant and controlling reaction conditions. The diameter of one-dimensional nanometer zinc oxide is between 100 and 300nm, and the length is between 1 and 6mu m. Compared with the prior method for preparing the one-dimensional nanometer zinc oxide, the method has the advantages of low cost, simple operation, low energy consumption, high crystallinity of products and the like. The nanometer zinc oxide material has excellent gas sensitivity on gassuch as methane, carbon monoxide, nitrogen dioxide and the like, and is a good gas-sensitive material.