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1 22 1 Vol J OU RNAL OF THE CHIN ESE RARE EAR TH SOCIET Y Feb Ξ TiO ( ; ; ) : X (XRD) B ET X (XPS) Nd TiO 2 Nd Nd TiO 2 Nd ( Ti ) TiO 2 Nd 1. 2 % : ; ; ; ; ; : O ; O : A : (2004) TiO 2 TiO 2 TiO 2 TiO 2 [1 3 ] TiO Nd TiO 2 17 ml 40 ml A ; 1 ml 0. 1 mol L - 1 TiO 2 Nd (NO 3 ) 3 10 ml 40 ml [4 8 ] 9 ml 30 TiO 2 min B ; A B 1 h [9 10 ] Nd TiO 2 TiO 2 2 d ; 100 TiO 2 ; h Nd 0. 2 % TiO 2 TiO % Nd 3 + / TiO 2 ; 017 % Nd 3 + / TiO % Nd 3 + / TiO % Nd 3 + / X TiO 2 ; TiO 2 Nd (XPS) Nd (Nd/ Ti) TiO TiO 2 (25 1) 012 g Nd TiO 2 Nd TiO 2 Nd 200 ml 12 mg L - 1 Ξ : ; : : ( ) ; (010151) ; 2003 C1 : ( ) ; : 3 ( E2mail : mail. com)

2 h 2. 1 XRD 20 ml 100 r min min m TiO 2 Nd TiO 2 TU21800 PC Nd TiO (101) 1. 3 TiO 2 8 W 101 Scherrer Nd a 1. 4 c ( 1) ; (25 1) 0. 2 g Nd TiO ml 12 mg L BET 1 h 1 Nd TiO 2 Nd TiO 2 20 ml 100 r min ; 0. 2 % Nd 3 + / TiO 2 min m TU2 TiO 2 ; 1800 PC 2. 3 XPS 1. 5 X D/ MAX 2500 X (XRD) Cu 40 kv 100 ma nm ; a c Scherrer D = k cos (1) d = 2sin l d 2 = h2 + k 2 a 2 + l 2 c 2 (2) (1) D k ; (2) d h 1 X k l a c (1) TiO2 ; (2) 012 % Nd 3 + / TiO 2 ; (3) 017 % Nd 3 + / TiO2 ; (4) 112 % Nd 3 + / TiO2 ; (5) 210 % Nd 3 + / TiO2 XPS PHI ESCA (XPS) 1 Nd Mg K TiO ev 16 ma 1215 kv ; 1 Nd/ Ti/ 10-8 N m - 2 ; C1s28416 ev / (m 2 ; Multipak 610 A CE Sorptomatic 1990 B E T 77 K 101 / cps X Nd TiO (mol - 1 ) % 0. 7 % 1. 2 % 2. 0 % A 3 A A A A g - 1 ) / nm a/ nm c/ nm A =

3 1 TiO TiO 2 Ti O C 3 Nd TiO 2 3 TiO 2 Nd Ti O O [11 ] ; Nd Ti O ; C O Ti X Ti ( ) Ti ( ) TiO 2 Ti - O C ; Nd TiO 2 Nd O1s XPS Nd Nd TiO 2 Ti2p Ti2p Ti Nd TiO 2 O1s XPS Ti2p 1/ 2 Ti2p 3/ E b = E b ( Ti2p 1/ 2 ) - E b ( Ti2p 3/ 2 ) 517 ev Ti2p 3/ 2 Sanjin s 3 2 Ti : ev (M - O) Ti ( ) Ti ( ) Ti ( ) ev ( ) 2 XPS (1) TiO2 ; (2) 012 % Nd 3 + / TiO 2 ; (3) 017 % Nd 3 + / TiO 2 ; (4) 112 % Nd 3 + / TiO 2 ; (5) 210 % Nd 3 + / TiO Ti2p XPS Nd Ti/ (mol - 1 ) Ti2p 1/ 2 B E/ ev FWHM/ ev / % Ti2p 3/ 2 Ti ( ) Ti ( ) B E/ ev FWHM/ ev / % B E/ ev FWHM/ ev / % 0. 0 % % % % % FWHM : ; B E : ( )

4 TiO 2 Nd TiO 2 O1s XPS Nd/ Ti/ O1s 1/ 3 O1s 2/ 3 O1s 3/ 3 (mol - 1 ) B E/ ev FWHM/ ev / % B E/ ev FWHM/ ev / % B E/ ev FWHM/ ev / % 0. 0 % % % % % (533 1) ev TiO 2 [12 ] Nd 3 Nd XPS O1s TiO 2 TiO % Nd 3 + / TiO ev ev Nd Nd 2 O 3 O1s Nd 3 + ( nm) Ti 4 + Nd ( nm) Nd TiO 2 [13 ] [ ] 1 ev O1s (M - O) a c TiO 2 Ti - O Nd Nd - O ; 532 ev O1s Nd TiO 2 ( 1) OH ; 528 ev O1s Nd Ti - O Nd 3 + Nd - O Ti - O 4 Nd Nd TiO 2 [O ]/ [ Ti ] Ti ( ) 210 % Nd 3 + / TiO 2 [O ]/ [ Ti ] Ti ( ) 210 % Nd 3 + / TiO 2 [ O ]/ [ Ti ] 4 [16 TiO 2 [O ]/ [ Ti ] 2 ] O 5 Nd TiO 2 [14 ] Nd 1. 2 % Nd 3 + / TiO 2 Nd TiO 2 O O Nd (O H) 3 Nd 2O [ O] / [ Ti] Ti( ) Nd TiO 2 ; Nd TiO [ O ]/ [ Ti ] Ti ( ) / [ Ti ( ( ) + Ti ( ) ] TiO % Nd 3 + / TiO % Nd 3 + / TiO % Nd 3 + / TiO % Nd 3 + / TiO Nd TiO 2

5 1 TiO 2 79 TiO 2 ; ; ; - Ti ( ) + O 2 Ti ( ) + O 2 (3) 4 Ti ( ) ( ) TiO 2 ; ( ) 0127 %Nd 3 + / TiO 2 ; ( ) 017 %Nd 3 + / ; 3 TiO 2 ; ( ) 112 %Nd 3 + / TiO 2 ; ( ) 210 %Nd 3 + / TiO 2 5 TiO % Nd 3 + / TiO % Nd 3 + / TiO % Nd 3 + / TiO % Nd 3 + / TiO 2 K/ 10-4 s R TiO 2 Ti ( ) Ti ( ) (O - 2 ) [17 19 ] : [20 ] ; Ti ( ) 4 XPS Nd [ O ]/ [ Ti ] Ti ( ) 2. 0 % Nd ; 2. 0 %Nd 3 + / TiO 2 Ti ( ) [O ]/ [ Ti ] 1. 2 % Nd 3 + / TiO 2 Nd (Nd (O H) 3 ) [5 ]. TiO 2 [J ] (3) : 463. (Nd 2 O 3 ) / 3 Nd 1. 2 % Nd [1 ] Fujishima A Honda K. Electrochemical p hotolysis of wa2 ter at a semiconductor electrode [ J ]. Nature (5358) : 37. [ 2 ] Hoff man M R Martin S T Choi W et al. Environmental applications of semiconductor photocatalysis [ J ]. Chem. Rev : 69. [3 ] Kamat P V. Photochemistry on nonreactive and reactive (semiconductor) surfaces [J ]. Chem. Rev : 267. [4 ]. TiO 2 2 B [J ] (6) : 958. [ 6 ] Li F B Li X Z. Photocatalytic properties of gold/ gold ion2 modified titanium dioxide for wastewater treat ment [J ]. Ap2 plied Catalysis A : General : 1. [ 7 ] Jos A. Nav o Gerardo Col n Manuel Mac as et al. Iron2doped titania semiconductor powders prepared by a sol2 gel method. Part I : synthesis and characterization [J ]. Ap2 plied Catalysis A : General : 111. [ 8 ]. [J ] : [9 ]. / TiO 2

6 80 22 [J ] (1) : 74. [ 10 ] Li Fangbai Gu Guobang Li Xinjun et al. Preparation [J ] (3) : 225. characterization and p hoto2catalytic behavior of Y 2O 3/ TiO 2 composite semiconductor nanopowder [J ]. Journal of Rare Eart hs (3) : 187. [11 ]. TiO 2 XPS [J ] (2) : 203. [12 ] Sanjin s R Tang H Berge H et al. Electronic structure of anatase TiO 2 oxide [J ]. J. Appl. Phys : [13 ]. XPS Nd [19 ] Mills A Morris S. Photomineralization of 42chlorop henol [J ] (1) : 79. [14 ]. TiO 2 of carbon dioxide photogeneration [J ]. J. Photochem. Pho2 [J ] (2) : 347. [ 15 ] Xu AnWu Gao Yuan Liu HanQin. The preparation characterization and their photocatalytic activities of rare2 eart h2doped TiO 2 nanoparticles [ J ]. Journal of Catalysis : 151. [16 ]. Y 2O 3/ TiO 2 [17 ] Liu H Ma H T Li X Z et al. The enhancement of TiO 2 photocatalytic activity by hydrogen thermal treat ment [J ]. Chemosp here (1) : 39. [ 18 ] Madhu Kumar P Badrinarayanan S Sastry M. Nanocrys2 talline TiO 2 studied by optical F TIR and X2ray p hotoelec2 tron spectroscopy : correlation to presence of surface states [J ]. Thin Solid Films (1-2) : 122. sensitized by titanium dioxide : a study of the initial kinetics tobiol. A : Chem : 75. [20 ] Li FangBai Li Xinjun Li Xiangzhong et al. Photoelec2 trocatalytic properties and reactivity of Ti/ Au2TiO 2 mesh electrodes [J ]. Transactions of Nonferrous Metals Society of China (6) : Enhancement of Photo2Catalytic Properties and Activity of Nd 3 + 2Doped TiO 2 Po wders Hou Meifang 1 Li Fangbai 2 3 Li Ruifeng 3 Wan Hongfu 2 Zhou Guoyi 1 Xie Kechang 3 ( 1. S out h Chi na I nstit ute of B ot any Chi nese A cadem y of S ciences na ; 2. Guangz hou Chi2 Guangdong Key L aboratory of A gricult u ral Envi ron ment Poll ution I ntegrated Con2 t rol Guangdong I nstit ute of Eco2Envi ron ment an d S oil S cience Guangz hou Chi2 na ; 3. T aiy uan U ni versity of S cience an d Technology S t ate Key L aboratory of Carbon 1 Chem ist ry an d Technology T aiy uan Chi na) Abstract : The crystal pattern and parameter t he specific area t he surface chemical state of p ure TiO 2 and Nd 3 + 2doped TiO 2 powders prepared by t he sol2gel met hod were characterized by means of X2ray diffraction ( XRD ) X2ray p hotoelectron spectroscopy ( XPS) and B E T met hod respective2 ly. The met hyl orange (MO) was chosen to be t he probe compound to measure t heir adsorptive prop2 erties and p hoto2catalytic activit y. The result s shows t hat t he N d doping hinders t he crystal t ransformatio n and decreases t he relative intensity of (101) peak. The crystallite sizes of Nd 3 + 2doped TiO 2 powders decrease while t heir specific surface area increase owing to t he N d doping. The XPS measurement show t hat t he surface chemical state can be improved and t he content of t heir surfaces increases wit h t he Nd doping. Ti ( ) on The relatio nship bet ween t he p hysicochemical p roper2 ties and t he p hoto2catalytic activity of t he p hoto2 catalyst s was discussed. The enhancement of p ho2 to2catalytic activity of Nd 3 + 2doped TiO 2 powders increase because of t heir adsorp tio n capacit y and t he suitable percent of Ti ( ) on t he surface. The adsorp tio n and p hoto2degradatio n experiment s show t hat t he optimum molar content of Nd may be 1. 2 %. Key words : catalitic chemistry ; photo2catalysis ; TiO2 ; Nd ; met hyl orange ; rare eart hs

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