功能材料
功能材料
공능재료
JOURNAL OF FUNCTIONAL MATERIALS
2012年
19期
2698-2701
,共4页
杨颖%孙艳丽%尹彦冰%张转芳%孙宏%阚侃%史克英
楊穎%孫豔麗%尹彥冰%張轉芳%孫宏%闞侃%史剋英
양영%손염려%윤언빙%장전방%손굉%감간%사극영
分级结构%氧化铁%NOx%吸附%脱附
分級結構%氧化鐵%NOx%吸附%脫附
분급결구%양화철%NOx%흡부%탈부
hierarchical structure%ion oxide%NOx%adsorption%desorption
为了制备室温下对NOx吸附性能优异的纳米材料,采用表面活性剂辅助的纳米粒子自组装方法制备了纳米多级结构扁圆型多孔α-Fe2O3。分别采用XRD、FT-IR、TG-DSC、SEM及TEM等技术手段研究了材料的形貌与结构。研究表明,每一个扁圆型的Fe2O3是由8～10nm左右的Fe2O3纳米颗粒聚集而成,属赤铁矿型的α-Fe2O3,晶型较好。在室温下对材料进行NOx的吸附脱附实验,研究发现,该材料的选择性吸附NOx能力和吸附量较市售的α-Fe2O3明显提高。原因在于,空气中的氧气吸附于多孔α-Fe2O3材料表面,形成的氧负离子,与NOx形成化学吸附,有助于提高NOx的吸附性能。初步探讨NOx的吸附机理,为半导体氧化物在室温下NOx检测提供了重要实验基础。
為瞭製備室溫下對NOx吸附性能優異的納米材料,採用錶麵活性劑輔助的納米粒子自組裝方法製備瞭納米多級結構扁圓型多孔α-Fe2O3。分彆採用XRD、FT-IR、TG-DSC、SEM及TEM等技術手段研究瞭材料的形貌與結構。研究錶明,每一箇扁圓型的Fe2O3是由8～10nm左右的Fe2O3納米顆粒聚集而成,屬赤鐵礦型的α-Fe2O3,晶型較好。在室溫下對材料進行NOx的吸附脫附實驗,研究髮現,該材料的選擇性吸附NOx能力和吸附量較市售的α-Fe2O3明顯提高。原因在于,空氣中的氧氣吸附于多孔α-Fe2O3材料錶麵,形成的氧負離子,與NOx形成化學吸附,有助于提高NOx的吸附性能。初步探討NOx的吸附機理,為半導體氧化物在室溫下NOx檢測提供瞭重要實驗基礎。
위료제비실온하대NOx흡부성능우이적납미재료,채용표면활성제보조적납미입자자조장방법제비료납미다급결구편원형다공α-Fe2O3。분별채용XRD、FT-IR、TG-DSC、SEM급TEM등기술수단연구료재료적형모여결구。연구표명,매일개편원형적Fe2O3시유8～10nm좌우적Fe2O3납미과립취집이성,속적철광형적α-Fe2O3,정형교호。재실온하대재료진행NOx적흡부탈부실험,연구발현,해재료적선택성흡부NOx능력화흡부량교시수적α-Fe2O3명현제고。원인재우,공기중적양기흡부우다공α-Fe2O3재료표면,형성적양부리자,여NOx형성화학흡부,유조우제고NOx적흡부성능。초보탐토NOx적흡부궤리,위반도체양화물재실온하NOx검측제공료중요실험기출。
To synthesize nanomaterial with good NOx adsorption ability at room temperature, a porous oblate- Like α-Fe2O3 has been synthesized by the technology of surfactant-assisted nanoparticles assembly and its NOx adsorption behavior at room temperature was studied. The means of XRD, FT-IR, TG-DSC, SEM and TEM were used to investigate the morphology and structure. The result show that every oblate-like Fe2O3 consist of nanoparticles with diameter of 8-10nm assembly, and it belongs to hematite phase of α-Fe203 with better crys- tal. The room temperature NOx, adsorption-desorption experiments reveals that the selective NOx adsorption a- bility of the synthesized material was obviously improved compared with purchase α-Fe203. The reason was that O2 in the air was adsorbed on the surface of the oblate-like α-Fe2O3, then O- was formed which can chemi- cal adsorb with NOx molecular. The formation mechanism of NOx adsorption was preliminarily discussed and important experiment basis were introduced for semiconductor oxide at room temperature NOx detection.
