The property-governed activity of silver-modified titania photocatalysts: The influence of titania matrix

光催化 锐钛矿 金红石 X射线光电子能谱 漫反射红外傅里叶变换 材料科学 光化学 银纳米粒子 微晶 二氧化钛 化学 无机化学 化学工程 纳米颗粒 催化作用 纳米技术 有机化学 冶金 工程类
作者
Kenta Yoshiiri,Barış Karabiyik,Kunlei Wang,Zhishun Wei,Christophe Colbeau‐Justin,Ewa Kowalska
出处
期刊:Journal of Chemical Physics [American Institute of Physics]
卷期号:156 (24) 被引量:9
标识
DOI:10.1063/5.0097762
摘要

Commercial titania photocatalysts were modified with silver nanoparticles (NPs) by the photodeposition method in the presence/absence of methanol. The obtained photocatalysts were characterized by XRD, XPS, diffuse reflectance spectroscopy, STEM, and time-resolved microwave conductivity (TRMC) methods. The photocatalytic activity was tested under UV/vis irradiation for (i) methanol dehydrogenation (during silver deposition), (ii) oxygen evolution with in situ silver deposition, and (iii) oxidative decomposition of acetic acid, as well as under vis irradiation for 2-propanol oxidation. The action spectra of 2-propanol oxidation were also performed. It has been confirmed that modification of titania with silver causes significant improvement of photocatalytic activity under both UV and vis irradiation as silver works as an electron scavenger (TRMC data) and vis activator (possibly by an energy transfer mechanism). The obtained activities differ between titania samples significantly, suggesting that the type of crystalline phase, particle/crystallite sizes, and electron traps' density are crucial for both the properties of formed silver deposits and resultant photocatalytic activity. It might be concluded that, under UV irradiation, (i) high crystallinity and large specific surface area are recommended for rutile- and anatase-rich samples, respectively, during hydrogen evolution, (ii) mixed crystalline phases cause a high rate of oxygen evolution from water, and (iii) anatase phase with fine silver NPs results in efficient decomposition of acetic acid, whereas under vis irradiation the aggregated silver NPs (broad localized surface plasmon resonance peak) on the rutile phase are promising for oxidation reactions.
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
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

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
Villanellel发布了新的文献求助10
1秒前
程艳完成签到 ,获得积分10
2秒前
MINGHUI完成签到,获得积分10
3秒前
3秒前
子车半烟完成签到,获得积分10
3秒前
5秒前
淳于安筠完成签到,获得积分10
5秒前
雨晴完成签到,获得积分10
8秒前
jbq发布了新的文献求助10
8秒前
joshar完成签到,获得积分10
8秒前
9秒前
量子星尘发布了新的文献求助10
11秒前
blueblue完成签到,获得积分10
13秒前
落后秋烟完成签到,获得积分10
15秒前
大橙子发布了新的文献求助10
16秒前
LMY完成签到 ,获得积分10
16秒前
Betty完成签到 ,获得积分10
16秒前
NexusExplorer应助jbq采纳,获得10
17秒前
渔渔完成签到 ,获得积分10
17秒前
18秒前
Tangyartie完成签到 ,获得积分10
18秒前
skbkbe完成签到 ,获得积分10
19秒前
陈俊雷完成签到 ,获得积分0
20秒前
阿苗完成签到,获得积分10
21秒前
神勇的天问完成签到 ,获得积分10
22秒前
22秒前
advance完成签到,获得积分10
22秒前
李cc发布了新的文献求助10
23秒前
蒋念寒发布了新的文献求助10
24秒前
Sindy完成签到,获得积分10
24秒前
彭于晏应助HH采纳,获得30
26秒前
26秒前
朴实的小萱完成签到 ,获得积分10
27秒前
科研通AI5应助哭泣笑柳采纳,获得10
27秒前
27秒前
温暖的蚂蚁完成签到 ,获得积分10
30秒前
dhn123完成签到,获得积分10
30秒前
ccx完成签到,获得积分10
30秒前
31秒前
biofresh发布了新的文献求助30
31秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds.Vol2 1100
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038184
求助须知:如何正确求助?哪些是违规求助? 3575908
关于积分的说明 11373872
捐赠科研通 3305715
什么是DOI,文献DOI怎么找? 1819255
邀请新用户注册赠送积分活动 892662
科研通“疑难数据库(出版商)”最低求助积分说明 815022