绿色合成Co_(3)O_(4)-CQDs蒲公英状复合材料及电催化性能  

Green Synthesis and Electrocatalytic Properties of Co_(3)O_(4)-CQDs with Dandelion Structure

作　　者：吉莹 王聪[1] 刘冬澳 吴凤楠 李生娟[1] JI Ying;WANG Cong;LIU Dong-ao;WU Feng-nan;LI Sheng-juan(School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学材料与化学学院,上海200093

出　　处：《广州化学》2022年第5期44-53,共10页Guangzhou Chemistry

基　　金：上海市基础研究发展计划(No.19JC1410402);上海市教委创新计划(No.2019-01-07-00-07-E00015)。

摘　　要：以可回收的木质纤维素一次性筷子为原料合成碳量子点(CQDs),再通过水热和低温煅烧两步法将其与Co_(3)O_(4)复合,得到蒲公英花球状Co_(3)O_(4)-CQDs复合电催化剂。通过XRD、SEM、TEM、电化学测试等手段对材料进行表征和测试。结果表明,其具有优异的催化活性和氧还原反应耐久性。尤其是当碳量子点质量为1.0 g时,Co_(3)O_(4)-1.0-CQDs表现出最佳的催化性能与稳定性,起始电位为0.926 V,极限电流密度6.028 mA/cm^(2),半波电位为0.762 V。Carbon quantum dots(CQDs)were synthesized from recyclable lignocellulose disposable chopsticks,and then compounded with Co_(3)O_(4)by hydrothermal and low-temperature calcination to obtain dandelion ball-like Co_(3)O_(4)-CQDs composite electrocatalyst.The materials were characterized and tested by XRD,SEM,TEM and electrochemical test.The results show that it has excellent catalytic activity and durability of oxygen reduction reaction.Especially when the mass of carbon quantum dots is 1.0 g,Co_(3)O_(4)-CQDs shows the best catalytic performance and stability.The initial potential is 0.926 V,the limit current density is 6.028 mA/cm^(2),and the half wave potential is 0.762 V.

关 键 词：锌-空气电池 碳量子点 四氧化三钴 蒲公英结构 电催化性能 

分 类 号：TB34[一般工业技术—材料科学与工程]