Agro-environmental Protection Institute, Ministry of Agriculture and Rural Affairs

Keqiang Zhang

Yuan Luo

Feng Wang

The present invention relates to a preparation method of La(OH)nanorod/walnut shell biochar composite material (LN-WB), comprising the following steps: putting walnut shell powder into a crucible and pyrolyzing and carbonizing in a muffle furnace at 350&#xb0; C. to 450&#xb0; C.; after the pyrolysis is completed, grinding and sieving the obtained biochar, and then repeatedly washing with deionized water; drying the washed biochar for later use; putting an appropriate amount of biochar into the deionized water to form a turbid solution; simultaneously dropwise adding LaCland NaOH to the above turbid solution by using a peristaltic pump; and allowing the obtained mixture to stand at room temperature for 20 to 30 h, washing and drying for later use. The present invention successfully prepares a La(OH)nanoparticle-loaded biochar composite material through a simple synthesis technology.

Growing community of inventors

Tianjin, China

Keqiang Zhang