四川大学学报(自然科学版)
四川大學學報(自然科學版)
사천대학학보(자연과학판)
JOURNAL OF SICHUAN UNIVERSITY(NATURAL SCIENCE EDITION)
2010年
4期
877-882
,共6页
赵蓉%丁冉峰%蒋炜%梁斌
趙蓉%丁冉峰%蔣煒%樑斌
조용%정염봉%장위%량빈
二氧化钛纳米管束%多孔钛片%阳极氧化法%光催化活性
二氧化鈦納米管束%多孔鈦片%暘極氧化法%光催化活性
이양화태납미관속%다공태편%양겁양화법%광최화활성
titania nanotube arrays%porous titanium%anodization method%photocatalytic activity
在氢氟酸电解液中采用阳极氧化法在多孔钛片上制备了二氧化钛纳米管束.考察了电压对二氧化钛氧化层形貌及温度对二氧化钛晶型的影响.制备的二氧化钛纳米管形貌,晶型及光催化性能分别采用SEM,XRD和光催化还原Pd2+沉积钯膜实验表征.SEM结果表明,最佳阳极氧化电压为30 V.在此电压下制备的二氧化钛纳米管长约为300 nm,管径约为40nm,壁厚约为20 nm.XRD结果显示,773 K退火后,二氧化钛为锐钛矿型;873 K退火后二氧化钛主要为锐钛矿型,含有2.99%的金红石相;973 K退火后二氧化钛几乎全为金红石型.773 K退火后的二氧化钛纳米管显示出优异的光催化性能,在光催化液中12 h能还原Pd2+沉积出0.6μm的钯膜.
在氫氟痠電解液中採用暘極氧化法在多孔鈦片上製備瞭二氧化鈦納米管束.攷察瞭電壓對二氧化鈦氧化層形貌及溫度對二氧化鈦晶型的影響.製備的二氧化鈦納米管形貌,晶型及光催化性能分彆採用SEM,XRD和光催化還原Pd2+沉積鈀膜實驗錶徵.SEM結果錶明,最佳暘極氧化電壓為30 V.在此電壓下製備的二氧化鈦納米管長約為300 nm,管徑約為40nm,壁厚約為20 nm.XRD結果顯示,773 K退火後,二氧化鈦為銳鈦礦型;873 K退火後二氧化鈦主要為銳鈦礦型,含有2.99%的金紅石相;973 K退火後二氧化鈦幾乎全為金紅石型.773 K退火後的二氧化鈦納米管顯示齣優異的光催化性能,在光催化液中12 h能還原Pd2+沉積齣0.6μm的鈀膜.
재경불산전해액중채용양겁양화법재다공태편상제비료이양화태납미관속.고찰료전압대이양화태양화층형모급온도대이양화태정형적영향.제비적이양화태납미관형모,정형급광최화성능분별채용SEM,XRD화광최화환원Pd2+침적파막실험표정.SEM결과표명,최가양겁양화전압위30 V.재차전압하제비적이양화태납미관장약위300 nm,관경약위40nm,벽후약위20 nm.XRD결과현시,773 K퇴화후,이양화태위예태광형;873 K퇴화후이양화태주요위예태광형,함유2.99%적금홍석상;973 K퇴화후이양화태궤호전위금홍석형.773 K퇴화후적이양화태납미관현시출우이적광최화성능,재광최화액중12 h능환원Pd2+침적출0.6μm적파막.
TiO2 nanotube arrays on porous titanium have been synthesized in HF electrolyte via anodization method.The effect of voltage on morphology and that of temperature on crystal was studied.The nanotubes were characterized by SEM,XRD and photocatalytic experiment that reduced Pd2+ to palladium.The results showed that,the optimized voltage was 30 V,and the I-t curve was also determined.SEM result showed that TiO2 nanotube arrays with approximately 300 nm in length,40 nm in diameter and 20 nm in wall thickness have been formed.XRD result revealed that crystal of TiO2 was anatase phase annealed at 773 K,mainly anatase with 2.99% rutile at 873 K,and nearly rutile at 973 K.The photocatalytic activity of the nanotube annealed 2 h at 773 K was excellent,and palladium membrane with 0.6μm thickness was deposited after 12 h.