Method for preparing silicate/carbon composite from attapulgite, and use of silicate/carbon composite

US11623210B2 · kind B2 · utility

Assignee

• CHANGZHOU UNIVERSITY · CN

Inventors

• Xiazhang Li · Changzhou City, CN
• Haiguang Zhang · 东风镇, CN
• Xini Chu · Zhangzhou, CN
• Jie Zhu · San Jose, US
• Xiangyu Yan · Zhangzhou, CN
• Shixiang Zuo · Changzhou City, CN
• Chao Yao · Zhangzhou, CN
• Wenjie Liu · Lo Wu, CN
• Huihui MAO · Zhangzhou, CN

Key dates

• Filing date: Nov 10, 2020
• Grant date: Apr 11, 2023
• Expiry date: May 6, 2041

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/52
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method for preparing a silicate/carbon composite from attapulgite, and use of the silicate/carbon composite are disclosed. The preparation method includes: (1) with attapulgite as a raw material, preparing SiO2 with a special structure; (2) dispersing the prepared SiO2 in water to obtain a suspension, and subjecting the suspension to ultrasonic dispersion; dissolving a metal nitrate in the suspension, adding NH4Cl, and adding ammonia water dropwise to the suspension; and adding sucrose to obtain a suspension; (3) subjecting the suspension to microwave hydrothermal reaction; after the reaction is completed, centrifuging a resulting system; and separating a resulting solid; and (4) subjecting the solid to high-temperature calcination in a muffle furnace, and grinding a resulting product to obtain the silicate/carbon composite, which can be used in photocatalytic ammonia synthesis.