Enhanced photocatalysis degradation of organophosphorus flame retardant using MIL-101(Fe)/persulfate: Effect of irradiation wavelength and real water matrixes

TCEP 过硫酸盐 光催化 化学 降级(电信) 光化学 材料科学 光降解 催化作用 有机化学 电信 磷化氢 计算机科学
作者
Han Hu,Haixuan Zhang,Ya Chen,Yukui Zhang,Zhuang Li,Huase Ou
出处
期刊:Chemical Engineering Journal [Elsevier]
卷期号:368: 273-284 被引量:198
标识
DOI:10.1016/j.cej.2019.02.190
摘要

Metal-organic-frameworks (MOFs) are novel classes of porous materials with diverse potentiality and easily tailored structures. Great challenges for the applications of MOF-based heterogeneous photocatalysis still exist, such as its stability and usability for real water bodies. In this study, MIL-101(Fe) was prepared and a MOF/photo/persulfate system was used to degrade tris(2-chloroethyl) phosphate (TCEP). Synthesized MIL-101(Fe) is high-purity regular crystal with a band gap energy at 2.41 eV, indicating that short wavelength visible light (400–520 nm) and ultraviolet light (200–400 nm) can be utilized by this MOF. Mechanism of photocatalysis reaction involved activation of MIL-101(Fe) for the transformation of Fe(III) to Fe(II), which induced further transformation of S2O82− to SO4−, and then TCEP was degraded by radical oxidation. The degradation pattern demonstrated a S-shape curve with two stages, induction period and radical oxidation. The former would be a process involving reactants adsorption and photocatalyst activation, while the later mainly included SO4− and/or OH reactions. Reaction rates of these two stages highly depended on activation wavelength and pH condition. Irradiation at 420 nm and acid condition were conductive to TCEP degradation, while high temperature and S2O82− addition accelerated the reaction. Five degradation products were elucidated, and the dominant degradation pathways included cleavage, hydroxylation, carbonylation and carboxylation. Furthermore, MIL-101(Fe)/420 nm/persulfate system demonstrated a more robust performance than homogeneous ultraviolet/persulfate system for TCEP removal in real water matrixes, implying that it will be a potential technology for elimination of organic pollutants in water.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
可爱的函函应助ee采纳,获得10
刚刚
1秒前
linya发布了新的文献求助10
2秒前
医路成功完成签到,获得积分10
2秒前
姜小麦发布了新的文献求助30
3秒前
jj发布了新的文献求助10
3秒前
rrfhl完成签到,获得积分10
6秒前
动听曼荷发布了新的文献求助10
7秒前
银升驳回了今后应助
8秒前
安静一曲完成签到 ,获得积分10
9秒前
HonamC完成签到,获得积分10
10秒前
FashionBoy应助KaMoria采纳,获得20
11秒前
11秒前
11秒前
可爱的函函应助abcdefg采纳,获得10
12秒前
CipherSage应助EED采纳,获得10
12秒前
sea完成签到,获得积分10
13秒前
15秒前
传奇3应助WQY采纳,获得10
16秒前
16秒前
星辰大海应助fanfan采纳,获得10
16秒前
鱼yu发布了新的文献求助10
16秒前
小乐儿~完成签到,获得积分10
17秒前
感动归尘发布了新的文献求助10
17秒前
Leila发布了新的文献求助10
19秒前
充电宝应助菜菜采纳,获得10
19秒前
动听曼荷完成签到,获得积分10
20秒前
透视眼发布了新的文献求助10
21秒前
grgr发布了新的文献求助10
22秒前
Bocy完成签到,获得积分10
22秒前
23秒前
23秒前
万能图书馆应助卷卷516采纳,获得10
24秒前
24秒前
李爱国应助咩咩羊采纳,获得10
24秒前
完美世界应助Carol采纳,获得10
25秒前
26秒前
26秒前
26秒前
bkagyin应助暮雪采纳,获得10
27秒前
高分求助中
Production Logging: Theoretical and Interpretive Elements 2500
Востребованный временем 2500
Aspects of Babylonian celestial divination : the lunar eclipse tablets of enuma anu enlil 1500
Agaricales of New Zealand 1: Pluteaceae - Entolomataceae 1040
Healthcare Finance: Modern Financial Analysis for Accelerating Biomedical Innovation 1000
Classics in Total Synthesis IV: New Targets, Strategies, Methods 1000
지식생태학: 생태학, 죽은 지식을 깨우다 600
热门求助领域 (近24小时)
化学 医学 材料科学 生物 工程类 有机化学 生物化学 纳米技术 内科学 物理 化学工程 计算机科学 复合材料 基因 遗传学 物理化学 催化作用 细胞生物学 免疫学 电极
热门帖子
关注 科研通微信公众号,转发送积分 3458565
求助须知:如何正确求助?哪些是违规求助? 3053409
关于积分的说明 9036451
捐赠科研通 2742665
什么是DOI,文献DOI怎么找? 1504455
科研通“疑难数据库(出版商)”最低求助积分说明 695312
邀请新用户注册赠送积分活动 694484