Fig. 3.
IMI
removal efficiency (%) (
a
and
b
) Kinetic plots (
c
and
d
) of IMI degradation by Fe(VI)-Ti/Zn LDH, Ti/Zn LDH and Fe(VI).DOC removal efficiency (%) (
e
and
f
) under visible light or dark.
Experimental conditions: [Fe(VI)]
0
= 114.0 μM, [IMI]
0
=
22.8 μM, [Fe(VI)-Ti/Zn LDH]
0
= 45.0 mg /L (about 114.0 µM Fe(VI)
inside), pH = 7.0 and T = 20.0
o
C.
催化机理
Fig. 4.
Influence
of various scavengers (TBA, chloroform, EDTA and FFA on the visible-light
photocatalytic activity of Fe(VI)-LDH composite (
a
) at predetermined
time and (
b
) reaction completed. (
c
) Degradation of PMSO and
generation of PMSO
2
in (
c1
) Fe(VI) alone and (
c2
)
Fe(VI)-LDH composite. Experimental
conditions: [IMI]
0
= 22.8
μ
M, [Fe(VI)-Ti/Zn LDH]
0
= 45.0
mg/L (about 114.0
μ
M Fe(VI) inside), [scavengers]
0
= 20.0 mM,
[PMSO]
0
= 38.0
μ
M
and pH = 7.0.
为了识别体系内的活性物种,本研究通过自由基淬灭、
PMSO
转化和原位电子顺磁光谱(
ESR
)等技术手段检揭示体系内存在
•OH
、
h
VB+
、
O
2●-
、
1
O
2
和
Fe(V)/Fe(IV)
等活性物种,其中发挥主要作用的活性物种为
•OH
、
h
VB+
、
O
2●-
以及
Fe(V)/Fe(IV)
。
Fig. 5
(
a
) The charge transfer resistance analyzed using EIS. (
b
)
FT-IR spectra for the Fe(VI)-Ti/Zn LDH composite and in-situ resulted
Fe(III)-LDH. XPS spectra of (
c
) Ti 2p (
d
) Fe 2p, (
e
) Zn 2p
and (
f
) O 1s of Ti/Zn LDH or
in-situformed Fe(III) particles.
Fig. 6
. Schematic mechanism of IMI photocatalytic degradation by Fe(VI)-Ti/Zn
LDH and self-formation in-situ Fe(III)-Ti/Zn LDH heterojunction photocatalyst.
降解路径
束集(第一作者):博士,现于浙江工业大学开展博士后研究工作,主要从事水体微污染物治理、高级氧化技术研究以及铁系净水材料的设计和制备研究,在
Chemical Engineering Journal, Journal of Hazardous Materials,
Science of The Total Environmental
等期刊发表论文
4
篇,授权发明专利
1
项。
王侃鸣(通讯作者):浙江工业大学讲师,硕导,博士毕业于英国克兰菲尔德大学(
Cranfield University
)。主要从事膜法污水处理与资源化、水中新污染物的治理等研究。目前在
Water Research, Chemical Engineering Journal, Journal of
Membrane Science
等期刊上发表论文
15
篇,授权发明专利
2
项。主持国家自然科学青年基金、中国博士后面上基金等项目。
王红宇(通讯作者):浙江工业大学教授,博导。主要研究方向为水污染控制技术,先后主持国家自然科学基金项目多项,在
Water Research, Chemical Engineering Journal
,中国给水排水等期刊发表论文
100
余篇。
备注
: Permissions for reuse of all Figures
have been obtained from the original publisher. Copyright 2023, Elsevier
Inc.
文章链接
: https://www.sciencedirect.com/science/article/pii/S1385894722066086?via%3Dihub