XRD
patterns
of
photocatalysts:
(a)
GaN:ZnO
in
compared
with
starting
materials
of
ZnO
and
Ga2O3;
(b)
GaN:ZnO
in
compared
with
fresh
and
spent
GaN:ZnO–Ni/NiO;
(c)
commercial
WO3 and
Pt/WO3.
tion
was
purged
with
pure
CO2 for
30
min
before
performing
the
photocatalytic
reaction
under
visible-light
(300W
Xenon
lamp,
270
mW
cm−2).
The
liquid
samples
(1–10
L)
and
gas
samples
(0.5–1
mL)
were
analyzed
by
GC-FID
for
the
detection
of
hydro
carbons
in
both
aqueous
and
gas
phases.