Central China Normal University

Lizhi Zhang

Falong Jia

Chengliang Mao

Fengjiao Quan

Minzi Liao

Shang Chen

The present invention relates to a method for removing hexavalent chromium from water bodies by sodium oxalate-modified zero-valent iron. The method comprising the steps: soaking zero-valent iron in a sodium oxalate solution for a period of time; and washing and drying to obtain the sodium oxalate-modified zero-valent iron; and then treating water bodies with the sodium oxalate-modified zero-valent iron to remove the heavy metal pollutant hexavalent chromium from the water bodies. Compared with other chemical or physical methods for treating the zero-valent iron, the processing technology of the sodium oxalate-modified zero-valent iron is simple and easy to implement, and also has advantages of high efficiency, no pollution and environmental friendliness.

Method for removing hexavalent chromium from water bodies by sodium oxalate-modified zero-valent iron

The present invention provides a monatomic metal-doped few-layer molybdenum disulfide electrocatalytic material, a preparing method thereof, and a method for electrocatalytic nitrogen fixation. The material has a few-layer ultra-thin and irregular flake-like microstructure with a length and a width of nanometer scale. A doping metal in the monatomic metal-doped few-layer molybdenum disulfide electrocatalytic material is dispersed in a form of single atoms. When the catalyst is used in electrochemical reduction of N, a Faradic efficiency in selective reduction of Ninto NHis 18% or above, and stability of the catalyst is better.

Monatomic metal-doped few-layer molybdenum disulfide electrocatalytic material, preparing method thereof, and method for electrocatalytic nitrogen fixation

A method for catalytic ammonia synthesis under concentrated solar energy and related catalysts. The method includes placing a catalyst in a reaction apparatus, feeding nitrogen and hydrogen into the reaction apparatus, and controlling a surface temperature of the catalyst to reach about 300&#xb0; C. to 550&#xb0; C. under irradiation of concentrated sunshine, to synthesize ammonia. The catalyst includes an amorphous and electron-rich black nano TiO(0&#x3c;z&#x3c;2) with a disordered surface serves as a carrier material, and an elemental nano-crystal of Fe or Ru serves as an active ingredient. The active ingredient is loaded on the carrier material. Sunshine is used as the energy during ammonia synthesis reaction, and light in the whole wave band can be utilized sufficiently. Ammonia can be synthesized under solar energy with a high efficiency, and no fossil energy or electrical energy is needed. A synergetic catalytic effect of optical energy and thermal energy can be obtained.

Growing community of inventors

Hubei, China

Lizhi Zhang