2,4-二羟基苯甲酸辅助合成不同形貌二氧化铈及其在NH_3-SCR中的应用（英文）  

CeO_2 in Different Morphologies with 2,4-Dihydroxybenzonic Acid as Auxiliary:Synthesis and Application in NH_3-SCR

作　　者：苏航 徐蔓 周诗健 杨福 孔岩 SU Hang;XU Man;ZHOU Shi-Jian;YANG Fu;KONG Yan(State Key Laboratory o f Materials-Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing 210009,China)

机构地区：[1]南京工业大学化工学院,材料化学工程国家重点实验室,南京210009

出　　处：《无机化学学报》2018年第8期1538-1546,共9页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21476108,21476108,21476108,21706121); 江苏省自然科学基金(No.BK20170995); 江苏省高校自然科学研究项目(No.16KJB530003); 江苏省高等教育机构重点学科建设项目(PAPD)资助

摘　　要：使用2,4-二羟基苯甲酸(DHBA)辅助控制合成出具有不同形貌(棒状与片状)的碱式碳酸铈。在水热阶段,碱式碳酸铈的形貌可以通过DHBA的量进行调控。当DHBA为3.5 mmol时,得到棒状碱式碳酸铈,然而增加DHBA的量至5.0 mmol时,可形成片状碱式碳酸铈。棒状与片状fcc-Ce O_2(面心立方二氧化铈)可成功地通过相应的焙烧处理获得。所得二氧化铈均有较大的比表面积(>60 m^2·g^(-1)),然而与片状二氧化铈相比,棒状二氧化铈有更高的氧化还原能力与更多的酸量。棒状二氧化铈用于NH_3-SCR时有着更好的催化活性。Different morphologies（rod-like and sheet-like） of Ce OHCO3 were controllably synthesized by using 2,4-dihydroxybenzonic acid（DHBA） as auxiliary. During the hydrothermal process, the morphologies of CeOHCO3 were controlled by adding different amount of DHBA. When the amount of DHBA was 3.5 mmol, rod-like Ce OHCO3 was synthesized, while by increasing the amount of DHBA to 5.0 mmol, the sheet-like Ce OHCO3 was relatively generated. Then the rod-like and sheet-like fcc-CeO2（face-centered cubic-CeO2） were successfully obtained by the subsequent calcination procedure. The resulted CeO2 affords large surface area（ 60 m2·g^（-1））,while the rod-like CeO2 exhibits higher redox ability and more acid amount compared to those of sheet-like CeO2.In addition, the rod-like CeO2 exhibits better catalytic activity in NH3-SCR.

关 键 词：二氧化铈 2 4-二羟基苯甲酸 纳米结构 水热合成 NH3-SCR 

分 类 号：O643.36[理学—物理化学] TB34[理学—化学]