Skip navigation
  • 中文
  • English

DSpace CRIS

  • DSpace logo
  • Home
  • Organizations
  • Researchers
  • Research Outputs
  • Explore by
    • Organizations
    • Researchers
    • Research Outputs
  • Academic & Publications
  • Sign in
  • 中文
  • English
  1. NTU Scholars
  2. 工學院
  3. 化學工程學系
Please use this identifier to cite or link to this item: https://scholars.lib.ntu.edu.tw/handle/123456789/64412
Title: 金屬-氧化鈦複合觸媒微結構之控制與改良(2/2)
Microstructural Engineering of metal-titania catalysts(2/2)
Authors: 吳乃立 
Keywords: 二氧化鈦;氫生成;光觸媒催化;煅燒氣氛;Ar;銅;Titania;hydrogen production;photocatalysis;calcination atmosphere;Ar;Cu
Issue Date: 20-Oct-2003
Publisher: 臺北市:國立臺灣大學化學工程學系暨研究所
Abstract: 
本研究主要探討二氧化鈦運用於光觸媒催化由甲醇水溶液中形成氫之相關議題。在此報告中將總
結兩項議題之研究結果,包括(1)觸煤煅燒氣氛(2)添加銅顆粒對觸媒活性之影響。二氧化鈦係經
由溶膠-凝膠法製成後於Ar, 合成空氣(air),氮(N2), 氫(H2 3% in N2) and 真空(vacuum;~5 x 10 -3
torr) 。對於由甲醇水溶液中形成氫之活性高低次序為Ar > air> N2 > vacuum ~ H2 。光譜分析顯示
氫與真空導致之低活性源於低表面氫氧基與高晶格缺陷密度。Ar 導致之高活性源於高表面氫氧
基及較多之低能隙激發位置(site)。添加表面銅顆粒大幅提昇TiO2 活性。光譜分析顯示銅顆粒在
反應過程中氧化至具最佳活性之最佳氧化態,而此氧化態無法經由空氣中熱氧化達成。將銅離子
溶入氧化鈦晶格中降低活性。

TiO2 photocatalysts for hydrogen production from aqueous methanol solution is the main subject of this work, Studies on two issues are reported here, including (1) the effect of calcination atmosphere and (2) the effect of Cu metallization. TiO2 catalysts were synthesized by a sol-gel process followed by calcination at 400 o C in Ar, air, N2, H2 (3% in N2) and vacuum (~5 x 10 -3 torr), respectively. Toward H2 production from a water/methanol (vol. ratio= 1.4/1) solution, the catalysts exhibited activities in the order, according to calcination atmosphere, of Ar > air> N2 > vacuum ~ H2. The low activity resulting from either vacuum or H2 calcination was ascribed to a reduced coverage of surface hydroxyl and high bulk defect density, based on the x-ray photoelectron and UV-visible spectroscopic analyses, while the high activity from Ar calcination is to enhanced visible-light excitation. For studying the effect of Cu, Cu particles have been deposited on TiO2 by incipient-wetness impregnation followed by low-temperature (400 o C) calcination/reduction, and the metallization process leads to significant, up to 10 folds, enhancement in photocatalytic activity of TiO2 for H2 production from aqueous methanol solution. Spectroscopic studies indicated that the metallic Cu particles were oxidized to have an optimum valence that can not be achieved by thermal oxidation. Dissolution of Cu ion in TiO2 lattice, in contrast, led to reduction in the activity.
URI: http://ntur.lib.ntu.edu.tw//handle/246246/9323
Other Identifiers: 912214E002007
Rights: 國立臺灣大學化學工程學系暨研究所
Appears in Collections:化學工程學系

Files in This Item:
File Description SizeFormat
912214E002007.pdf121.43 kBAdobe PDFView/Open
Show full item record

Page view(s)

17
checked on Mar 31, 2022

Download(s)

6
checked on Mar 31, 2022

Google ScholarTM

Check

Related Items in TAIR


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

臺大位居世界頂尖大學之列,為永久珍藏及向國際展現本校豐碩的研究成果及學術能量,圖書館整合機構典藏(NTUR)與學術庫(AH)不同功能平台,成為臺大學術典藏NTU scholars。期能整合研究能量、促進交流合作、保存學術產出、推廣研究成果。

To permanently archive and promote researcher profiles and scholarly works, Library integrates the services of “NTU Repository” with “Academic Hub” to form NTU Scholars.

總館學科館員 (Main Library)
醫學圖書館學科館員 (Medical Library)
社會科學院辜振甫紀念圖書館學科館員 (Social Sciences Library)

開放取用是從使用者角度提升資訊取用性的社會運動,應用在學術研究上是透過將研究著作公開供使用者自由取閱,以促進學術傳播及因應期刊訂購費用逐年攀升。同時可加速研究發展、提升研究影響力,NTU Scholars即為本校的開放取用典藏(OA Archive)平台。(點選深入了解OA)

  • 請確認所上傳的全文是原創的內容,若該文件包含部分內容的版權非匯入者所有,或由第三方贊助與合作完成,請確認該版權所有者及第三方同意提供此授權。
    Please represent that the submission is your original work, and that you have the right to grant the rights to upload.
  • 若欲上傳已出版的全文電子檔,可使用Sherpa Romeo網站查詢,以確認出版單位之版權政策。
    Please use Sherpa Romeo to find a summary of permissions that are normally given as part of each publisher's copyright transfer agreement.
  • 網站簡介 (Quickstart Guide)
  • 使用手冊 (Instruction Manual)
  • 線上預約服務 (Booking Service)
  • 方案一:臺灣大學計算機中心帳號登入
    (With C&INC Email Account)
  • 方案二:ORCID帳號登入 (With ORCID)
  • 方案一:定期更新ORCID者,以ID匯入 (Search for identifier (ORCID))
  • 方案二:自行建檔 (Default mode Submission)
  • 方案三:學科館員協助匯入 (Email worklist to subject librarians)
Build with DSpace-CRIS - Extension maintained and optimized by Logo 4SCIENCE Feedback