Table 12.1
(continued)
Photocatalysts
Cocatalysts
Optimal product yield
(μmol/gÁh exception unit
stated otherwise)
Brief photocatalyst preparation
method
CO
2 photoreduction evaluation
details
Refs.
20 Hierarchical
Z-scheme CdS–
WO
3
CdS
CH
4 (1.02)
Deposition precipitation method
using Cd(NO
3 )
2 as precursor and
Na
2 S as precipitant
100 mg catalyst added to 10 mL distilled water in a glass reactor, 1 atm
CO
2 , 300 W Xe lamp:150 mW cm
À2
was used as the light source, ambient
temperature
[38]
21 Z-scheme BiOI/gC
3 N
4
BiOI
CO (4.86); CH
4 (0.18);
O
2 (2.78)
Deposition method using Bi(NO
3 ) as
precursor and KI as precipitant
0.10 g catalyst, CO
2 and H
2 O vapor,
300 W Xe lamp with a UV-cutoff
flitter (λ > 400 nm) was used as the
light source
[39]
22 Pt-MnO
x /CeO
2
Pt, MnO
x
CH
4 (1.12)
One-step photo-deposition method
0.1 g catalyst-4.2 cm
2
, 0.4 mL H
2 O,
CO
2 and H
2 O vapor, the system was
placed in dark to reach adsorptiondesorption equilibrium before the
light irradiation; 300 W Xe lamp was
used as the light source
[40]
23 Pt/HCTSO
Pt, CoO
x
CH
4 (9.3); CO (0.3); H
2
(14.1)
“EISA” method for co-species incorporation and alcohol reduction for Pt
loading
30 mg
filmlike catalyst on 6 cm
2
diameter Petri dish, CO
2 , and 1 mL
H
2 O; 300 W Xe lamp was used as the
light source
[8]
24 Pt@CuO
x /TiO
2
(p25)
Pt@CuO
x
CH
4 (33); CO (8.3); H
2
(25)
Stepwise photo-deposition of Pt and
CuO
x using a 300 W Hg lamp
0.02 g catalyst, 0.2 MPa CO
2 , 4 mL
H
2 O, 200 W Xe lamp was used as the
light source
[41]
25 Pt-RuO
2 /
Zn
2 GeO
4 nanobelt
Pt, RuO
2
CH
4 (25)
first hour
Photoreduction of H
2 PtCl
4 under a
300 W Xe lamp
0.1 g catalyst-4.2cm
2
, 1 atm, 1 mL
H
2 O, CO
2 and H
2 O vapor, 300 W Xe
lamp was used as the light source
[42]
280
12 Roles and Properties of Cocatalysts in Semiconductor-Based Materials. . .
(continued)
Photocatalysts
Cocatalysts
Optimal product yield
(μmol/gÁh exception unit
stated otherwise)
Brief photocatalyst preparation
method
CO
2 photoreduction evaluation
details
Refs.
20 Hierarchical
Z-scheme CdS–
WO
3
CdS
CH
4 (1.02)
Deposition precipitation method
using Cd(NO
3 )
2 as precursor and
Na
2 S as precipitant
100 mg catalyst added to 10 mL distilled water in a glass reactor, 1 atm
CO
2 , 300 W Xe lamp:150 mW cm
À2
was used as the light source, ambient
temperature
[38]
21 Z-scheme BiOI/gC
3 N
4
BiOI
CO (4.86); CH
4 (0.18);
O
2 (2.78)
Deposition method using Bi(NO
3 ) as
precursor and KI as precipitant
0.10 g catalyst, CO
2 and H
2 O vapor,
300 W Xe lamp with a UV-cutoff
flitter (λ > 400 nm) was used as the
light source
[39]
22 Pt-MnO
x /CeO
2
Pt, MnO
x
CH
4 (1.12)
One-step photo-deposition method
0.1 g catalyst-4.2 cm
2
, 0.4 mL H
2 O,
CO
2 and H
2 O vapor, the system was
placed in dark to reach adsorptiondesorption equilibrium before the
light irradiation; 300 W Xe lamp was
used as the light source
[40]
23 Pt/HCTSO
Pt, CoO
x
CH
4 (9.3); CO (0.3); H
2
(14.1)
“EISA” method for co-species incorporation and alcohol reduction for Pt
loading
30 mg
filmlike catalyst on 6 cm
2
diameter Petri dish, CO
2 , and 1 mL
H
2 O; 300 W Xe lamp was used as the
light source
[8]
24 Pt@CuO
x /TiO
2
(p25)
Pt@CuO
x
CH
4 (33); CO (8.3); H
2
(25)
Stepwise photo-deposition of Pt and
CuO
x using a 300 W Hg lamp
0.02 g catalyst, 0.2 MPa CO
2 , 4 mL
H
2 O, 200 W Xe lamp was used as the
light source
[41]
25 Pt-RuO
2 /
Zn
2 GeO
4 nanobelt
Pt, RuO
2
CH
4 (25)
first hour
Photoreduction of H
2 PtCl
4 under a
300 W Xe lamp
0.1 g catalyst-4.2cm
2
, 1 atm, 1 mL
H
2 O, CO
2 and H
2 O vapor, 300 W Xe
lamp was used as the light source
[42]
280
12 Roles and Properties of Cocatalysts in Semiconductor-Based Materials. . .