【公開日：2023.07.28】【最終更新日：2023.05.18】

課題データ / Project Data

課題番号 / Project Issue Number

22BA0037

利用課題名 / Title

Observation of chemical states by using (ARIM)Photoemission Spectrometer(XPS/UPS) JPS-9010TR

利用した実施機関 / Support Institute

筑波大学 / Tsukuba Univ.

機関外・機関内の利用 / External or Internal Use

内部利用（ARIM事業参画者以外）/Internal Use (by non ARIM members)

技術領域 / Technology Area

【横断技術領域 / Cross-Technology Area】（主 / Main）計測・分析/Advanced Characterization（副 / Sub）-

【重要技術領域 / Important Technology Area】（主 / Main）マテリアルの高度循環のための技術/Advanced materials recycling technologies（副 / Sub）-

キーワード / Keywords

質量分析/Mass spectrometry,電子分光,資源循環技術/ Resource circulation technology

利用者と利用形態 / User and Support Type

利用者名（課題申請者）/ User Name (Project Applicant)

楊 英男

所属名 / Affiliation

筑波大学

共同利用者氏名 / Names of Collaborators in Other Institutes Than Hub and Spoke Institutes

SUN XIANG,AN GUANGQI,YU FANGTING

ARIM実施機関支援担当者 / Names of Collaborators in The Hub and Spoke Institutes

利用形態 / Support Type

（主 / Main）機器利用/Equipment Utilization（副 / Sub）,技術補助/Technical Assistance

利用した主な設備 / Equipment Used in This Project

BA-015：X線光電子分光装置

報告書データ / Report

概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)

Hydrogen evolution from water via photocatalytic water splitting process has been regarding as one of the most promissing approaches to solve energy crisis and environmetal pollutions caused by buring fossil fuels. During this process, the chemical features of photocatalysts playes an important role in hydrogen evolution efficiency. Therefore, it is very necessery to detect the chemical features such as chemical state of each element in photocatalysts. XPS has been repotred as a very useful method to give detailed information of chemical state. Based on this, in my own study, the chemical state of each elements in photocatalyst will be observed by XPS.

実験 / Experimental

The photocatalysts was synthesized by a one-pot hydrothermal method, and cooled into room temperature. Then, the photocatalyst was ground into powder. After that, the chemical composition and elememtal state of prepared photocatalyst were detected by X-ray Photoelectron Spectroscopy (XPS, JEOL, JPS-9010TR).

結果と考察 / Results and Discussion

 Survey XPS spectra revealed the well existence of O, Ti, Ag and P elements in PAgT and OVs-PAgT composte.
Ti 2p XPS spectra of original PAgT (Fig. 2A) exhibited two peaks at 458.7 eV and 464.4 eV, respectively. Both of them were attributed to the Ti⁴⁺  of TiO₂ component in PAgT composite. However, as for OVs-PAgT (Fig. 2B-2F), the Ti 2p XPS spectra could be divided into several peaks. The peaks at 458.7 eV and 464.4 eV were assigned to the Ti⁴⁺, while the peaks at 463.2 eV and 457.8 eV were ascribed to the Ti³⁺. The existence of Ti³⁺ further confirmed the presence of OVs in OVs-PAgT. 
The peak at 529 eV was corresponded to the Ag-O, implying the existence of Ag₂O in the obtained catalysts. The peak at 531.3 eV was originated from Ti-O-P, suggesting the substituted P element in lattice of TiO₂. The peak located at 529. 7 eV and 530.9 eV were contributed to the lattice oxygen (Ti-O) and non-lattice oxygen (Ti-OH), respectively. 

図・表・数式 / Figures, Tables and Equations

Fig. 1 Survery XPS spectre of synthesized photocatalysts.

Fig. 2 The Ti 2p XPS high-resolution spectra of (A) PAgT, (B) OVs-PAgT-16, (C) OVs-PAgT-12, (D) OVs-PAgT-8, (E) OVs-PAgT-6 and (F) OVs-PAgT-4.

Fig. 3 The O 1s XPS high-resolution spectra of (A) PAgT, (B) OVs-PAgT-16, (C) OVs-PAgT-12, (D) OVs-PAgT-8, (E) OVs-PAgT-6 and (F) OVs-PAgT-4.

その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)

References:X.S. Zhou, F. Peng, H.J. Wang, H. Yu, Y.P. Fang, Carbon nitride polymer sensitized TiO₂ nanotube arrays with enhanced visible light photoelectrochemical and photocatalytic performance, Chem. Commun. 47 (2011) 10323-5.
X.B. Zhang, H.M. Tian, X.Y. Wang, G.G. Xue, Z.P. Tian, J.Y. Zhang, S.K. Yuan, T. Yu, Z.G. Zou, The role of oxygen vacancy-Ti³⁺ states on TiO₂ nanotubes' surface in dye-sensitized solar cells, Mater. Lett. 100 (2013) 51-53.
H. Khan, Z.R. Jiang, D. Berk, Molybdenum doped graphene/TiO₂ hybrid photocatalyst for UV/visible photocatalytic applications, Sol. Energy 162 (2018) 420-430.
X.D. Jiang, Y.P. Zhang, J. Jiang, Y.S. Rong, Y.C. Wang, Y.C. Wu, C.X. Pan, Characterization of oxygen vacancy associates within hydrogenated TiO₂: A Positron Annihilation Study, J. Phys. Chem. C 116 (2012) 22619-22624.X.H. Hu, Q. Zhu, X.L. Wang, N. Kawazoe, Y.N. Yang, Nonmetal–metal–semiconductor-promoted P/Ag/Ag₂O/Ag₃PO₄/TiO₂ photocatalyst with superior photocatalytic activity and stability, J. Mater. Chem. A 3 (2015) 584 17858-17865.

成果発表・成果利用 / Publication and Patents

論文・プロシーディング（DOIのあるもの） / DOI (Publication and Proceedings)

口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.

特許 / Patents

特許出願件数 / Number of Patent Applications：0件
特許登録件数 / Number of Registered Patents：0件