I 0.6 hien cua qua trinh hoa ly
O Kel qua thuc nghiem ^ ^ Kel qua ly thuyet
^ ^ Kel qua ly thuyet
—\ > 1 > 1 ' 1 p 1 — 1 1 1 — I — . — I p 1
•1.2 -0.9 -0.6 -0.3 0.0 0.3 0.6 0.9 1.2
The phan cue so v6\ SCE
Hinh 4.15: Ddc trung Mott-Schottky dien cue TiO2 đc
Tren hinh 4.15 la dac tnmg Mott-Schottky cua dien ctre Ti02 dac. Dien cue nay la mau ly tudng de kiem nghiem md hinh rao thé Schottky c6 dien. Trong miu dien cue nay, cac tiep xiic dien giai / ban dan khdi / kim loai cd pham chát lot. Cac khoanh iron la sd lieu thuc nghiem, cdn dudng lien net la kei qua tinh loan theo ly thuyei bang phuong phap sd trinh bay 0 chuong 3 cua luan an. Dac tfnh tuyen tfnh cua dudng Mott-Schottky đi vdi dien cue Ti02 dac cho iháy mo hinh rao thé Shottky e6 dien phii hop dien cue loai naỵ
Ddi vdi dien cue Ti02 nano-xop se nay sinh nhirng khd khan trong viec
xac dinh cac thong sd vat lieu tur dac tnmg C-V. Khi hat ban dan cd kich thude cung CO vdi kfch thude viing dien tfch khdng gian (vai do dai Debye) va cáu hinh xop tao ra tiep xiic SEI tren limg hat nho, hieu ung che chan tinh dien tai
'b l.OOE + 010 - 8.00E + 009 6 . 0 0 E + 0 0 9 - 4.00E + 009 - 2.00E + 009 ỌOOE-t-000- Oo o O K ^ t q u a t h u c n g h i e m • ^ ^ K e l q u a ly t h u y e t •1.2 -0.9 — 1 " - -0.6 — I — •0.3 0.0 0.3 —r— 0.6 0.9 1.2 T h e p h d n c u e so v d i S C E
Hinh 4.16: Ddc trung Mott-Schottky cua dien cue Ti02 Sol-gel trong NaOH + Methanol (nano-xop)
Dac tnmg Mott-Shottky ciia dien cue Ti02 sol-gel trong dung dich NaOH+Methanol tren hinh 4.16. Ro rang la dudng Mott-Schottky cua dien
cue nano-xop khong tuyén tfnh nhu dien cue dac (Hinh 4.15). De kiem chung
cho luan diem tren, trong luan an tien hanh phan tfch ket qua do ciia nhdm nghien ciiu khac cua Germany [44] (Hinh 4.17) : Dang dieu thay doi dudng Mott-Schottky cung gidng nhu miu sol-gel do luan an che taọ
1.0x10'" 8.0x10' 6 . 0 x 1 0 ' - ^*' 4.0x10 - 2.0x10' 0.0 O o