From waste Coca Cola® to activated carbons with impressive capabilities for CO2 adsorption and supercapacitors
From waste Coca Cola® to activated carbons with impressive capabilities for CO2 adsorption and supercapacitors
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DOI：
10.1016/j.carbon.2017.02.030
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发表时间：
2017-05-01
期刊：
影响因子：
10.9
通讯作者：
Liu, Jian
中科院分区：
文献类型：
--
作者：
Boyjoo, Yash;Cheng, Yi;Liu, Jian
我们在此报道了通过利用可口可乐（R）作为废弃生物质的潜在来源来合成杂原子掺杂的高表面积微孔活性炭（AC），用于作为CO2吸附剂和超级电容器的电极的应用。首先通过水热处理CocaCola（R）获得N，S双掺杂碳球，然后通过KOH或ZnCl 2热活化。所得KOH活性炭材料（CMC-3）表现出极高的CO2吸附能力，在25 ℃和1 atm下为5.22 mmol g（-1），这是碳质材料有史以来记录的最高值之一。另一方面，ZnCl 2活性炭材料（CMC-2）作为超级电容器的电极表现优异，在6 M KOH电解质中在1A g（-1）的电流密度下表现出352.7F g（-1）的非常高的比电容，这也是生物质衍生AC记录的最高值之一。与其他传统生物质材料相比，可口可乐（R）具有高含量的碳作为糖，提供O，N和S的原位掺杂，并且具有恒定的组成，使其成为合成高性能AC的有吸引力和廉价的替代品，用于环境和能量存储目的。(C)2017爱思唯尔有限公司版权所有
We herein report the synthesis of heteroatoms doped, high surface area microporous activated carbons (AC) by utilisation of Coca Cola (R) as a potential source of waste biomass, for applications as CO2 adsorbent and electrodes of supercapacitors. N, S dual doped carbon spheres are firstly obtained by hydrothermal treatment of Coca Cola (R) and then thermally activated by either KOH or ZnCl2. The resulting KOH activated carbon material (CMC-3) exhibits extremely high adsorption capability for CO2 with 5.22 mmol g(-1) at 25 degrees C and 1 atm, one of the highest values ever recorded for a carbonaceous material. On the other hand, ZnCl2 activated carbon material (CMC-2) performs excellently as an electrode for supercapacitor, exhibiting very high specific capacitance of 352.7 F g(-1) at a current density of 1 A g(-1) in 6 M KOH electrolyte, which again is one of the highest values recorded for a biomass derived AC. Coca Cola (R) has high content in carbon as sugars, provides in-situ doping of O, N and S and has constant composition, as opposed to other conventional biomass materials, making it an attractive and cheap alternative for synthesis of high performance AC for environmental and energy storage purposes. (C) 2017 Elsevier Ltd. All rights reserved.