Adsorption of Carbon Dioxide on 3-Aminopropyl-Triethoxysilane Modified Graphite Oxide
Adsorption of Carbon Dioxide on 3-Aminopropyl-Triethoxysilane Modified Graphite Oxide
复制标题
DOI：
10.1021/ef400467w
复制
发表时间：
2013-06-01
期刊：
影响因子：
5.3
通讯作者：
Lee, Ki Bong
中科院分区：
文献类型：
--
作者：
Hong, Seok-Min;Kim, Sung Hyun;Lee, Ki Bong
对全球变暖的严重性和症状的认识正在鼓励开发旨在减少二氧化碳排放的技术，二氧化碳是一种代表性的温室气体，它有助于全球变暖。减少CO2排放已经成为主要的环境问题，并且在CO2捕获中已经采用了各种方法，例如吸收、吸附和膜分离。近年来，设计用于通过吸附捕获CO2的技术由于其低能耗和易于再生而受到相当大的关注。为了开发新型CO2吸附剂，采用胺分子对氧化石墨（GO）进行功能化，合成了3-氨丙基-三乙氧基硅烷改性氧化石墨（Gr-APTS）。通过用高浓度酸氧化石墨来制备GO以保持广泛的含氧官能团。然后，将胺分子接枝到GO的表面上，这提供了CO2亲和性的增强，并增加了在30 ℃的温度和类似于1个大气压的压力下的CO2吸附吸收。Gr-APTS在吸附/解吸循环中也表现出高度稳定的CO2吸附吸收。
An awareness of the seriousness and symptoms of global warming is encouraging the development of technologies designed to reduce the emissions of CO2, a representative greenhouse gas, which contributes to global warming. The reduction of CO2 emissions has become a major environmental concern, and various methods such as absorption, adsorption, and membrane separation have been employed in CO2 capture. In recent times, technology designed to capture CO2 by adsorption has received considerable attention due to its low energy consumption and easy regenerability. In this study, 3-aminopropyl-triethoxysilane modified graphite oxide (Gr-APTS) was synthesized via the functionalization of graphite oxide (GO) with amine molecules for the development of a new CO2 adsorbent. GO was prepared to hold extensive oxygen-containing functionalities through oxidizing graphite with highly concentrated acid. Then, the amine molecules were grafted onto the surface of the GO, which provided an enhancement of the CO2 affinity and increased the CO2 adsorption uptake at a temperature of 30 degrees C and a pressure of similar to 1 atm. Gr-APTS also showed a highly stable CO2 adsorption uptake in the adsorption/desorption cycles.