版塊導(dǎo)航: 正在加載中...

應(yīng)《網(wǎng)絡(luò)安全法》要求，自2017年10月1日起，未進(jìn)行實(shí)名認(rèn)證將不得使用互聯(lián)網(wǎng)跟帖服務(wù)。為保障您的帳號(hào)能夠正常使用，請(qǐng)盡快對(duì)帳號(hào)進(jìn)行手機(jī)號(hào)驗(yàn)證，感謝您的理解與支持！

24小時(shí)熱門版塊排行榜

返回列表

xsysunjuan

新蟲 (初入文壇)

應(yīng)助: 0 (幼兒園)
金幣: 10
帖子: 6
在線: 1.6小時(shí)
蟲號(hào): 3079308
注冊(cè): 2014-03-22
專業(yè): 催化化學(xué)

[求助] 論文摘要求翻譯

本文采用共沉淀法，以Zn(NO3)2和無水(Na)2CO3為原材料, 制備1%的Y3+和1%Eu3+分別單一摻雜和1：1比例共摻雜的納米氧化鋅粉體，借助于XRD、TEM、熒光光譜儀等測(cè)試手段分別對(duì)粉體的形貌、相組成和其光致發(fā)光性能分別進(jìn)行了表征分析并對(duì)比。結(jié)果表明:摻雜元素釔和銪絕大部分都進(jìn)入了ZnO 的晶格中，Y3+摻雜與Eu3+ 摻雜對(duì)納米ZnO納米粉體的晶型未發(fā)生任何改變，粒徑都相對(duì)減小，發(fā)光強(qiáng)度也均有所削弱，而銪的削弱能力要比釔更強(qiáng)一些。對(duì)于按1：1比例共摻雜的納米氧化鋅而言，其發(fā)光強(qiáng)度的削弱在一定程度上被兩種元素所均衡，呈現(xiàn)趨于兩種單一摻雜中間的趨勢(shì)。在紅外波段吸收來看，摻雜Y3+ 的氧化鋅峰值增大，而Eu3+ 摻雜的氧化鋅峰值降低, 因此Y3+有更好的吸收效果, 共摻后，Eu元素在一定程度上起到了催化的作用，降低了Y3+對(duì)氧化鋅的單一作用，從而降低了紅外波段的吸收。
關(guān)鍵詞:納米ZnO；Y/Eu；共沉淀法；光致發(fā)光性能

回復(fù)此樓

» 猜你喜歡

一志愿中南化學(xué)337求調(diào)劑已經(jīng)有4人回復(fù)
281求調(diào)劑（0805）已經(jīng)有23人回復(fù)
265求調(diào)劑已經(jīng)有9人回復(fù)
279分求調(diào)劑一志愿211 已經(jīng)有10人回復(fù)
招收調(diào)劑碩士已經(jīng)有12人回復(fù)
296求調(diào)劑已經(jīng)有8人回復(fù)
招收博士1-2人已經(jīng)有3人回復(fù)
085700資源與環(huán)境308求調(diào)劑已經(jīng)有11人回復(fù)
274求調(diào)劑已經(jīng)有8人回復(fù)
290求調(diào)劑已經(jīng)有4人回復(fù)

1樓 2015-05-15 15:58:17

已閱回復(fù)此樓關(guān)注TA 給TA發(fā)消息送TA紅花 TA的回帖

genhunter

至尊木蟲 (著名寫手)

翻譯EPI: 387
應(yīng)助: 259 (大學(xué)生)
金幣: 9757.4
散金: 10
紅花: 60
帖子: 2484
在線: 1793小時(shí)
蟲號(hào): 2558361
注冊(cè): 2013-07-22
專業(yè): 腫瘤化學(xué)藥物治療

【答案】應(yīng)助回帖

★ ★ ★ ★ ★ ★
愛與雨下: 金幣+1 2015-05-18 18:53:22
xsysunjuan(RXMCDM代發(fā)): 金幣+5 2015-10-17 08:27:15

Zinc oxide nanoparticles powder doped with Y3 + (1%) and Eu3 + (1%), either singlely or 1:1 mixture, respectively, were prepared by co-precipitation method from Znc (NO3) 2 and anhydrous (Na) 2 CO3 as raw materials. The powder morphology, phase composition and the photoluminescence properties of these nano composites were characterized with XRD, TEM and fluorescence spectrometer methods, respectively. Results show that the the vast majority of the doped yttrium and europium entered the ZnO lattice, and the doping did not change the crystal structure of ZnO nanoparticles. There were reduction in particle sizes and the luminous intensity, which is more apparent in yttrium-doped than europium-doped. For nano ZnO doped with the mixture at 1:1 proportion, the weakening effect is in the middle of that of individually doped. The peak value of infrared absorption for Y3+-doped zinc oxide increased, while the peak value of infrared absorption for Eu3+ -doped zinc oxide decreased, indicating that the Y3 + has better absorption effect. For the co-doped ZnO, Eu elements plays a catalytic role to a certain extent, reduces the dominant effect of Y3+ to zinc oxide, thus reduces the absorption value in infrared wavelengths.
Key words: nano ZnO; Y/Eu; Co-precipitation method; Photoluminescence properties

贊一下(1人)

回復(fù)此樓

離成功還差一點(diǎn)

2樓2015-05-17 08:50:09

已閱回復(fù)此樓關(guān)注TA 給TA發(fā)消息送TA紅花 TA的回帖

相關(guān)版塊跳轉(zhuǎn) 我要訂閱樓主 xsysunjuan 的主題更新