ZnO with Controllable Oxygen Vacancies for Photocatalytic Nitrogen Oxide Removal

光催化 吸附 催化作用 氮气 氧气 氧化物 激进的 分子 密度泛函理论 材料科学 化学工程 氮氧化物 化学 光化学 纳米技术 氮氧化物 物理化学 计算化学 有机化学 工程类 燃烧
作者
Reshalaiti Hailili,Hongwei Ji,Kaiwen Wang,Xing’an Dong,Chuncheng Chen,Hua Sheng,Detlef W. Bahnemann,Jincai Zhao
出处
期刊:ACS Catalysis [American Chemical Society]
卷期号:12 (16): 10004-10017 被引量:114
标识
DOI:10.1021/acscatal.2c02326
摘要

Semiconductor-based photocatalysis is an ideal method for air purification by eliminating nitrogen oxide (NO). However, sluggish carrier separation, photocatalysts deactivation and incomplete oxidation are significant bottlenecks for photocatalytic treatment of indoor pollutant NO. Herein, ZnO with assorted structures is fabricated and undergoes further modification for deliberate surface defect constructions. Utilized flux agents during the synthesis provide a more feasible reducing atmosphere, under which spontaneous generations of the surface vacancies become easier, and gradient concentrations are precisely controlled. Photocatalyst characterizations affirm the successful creation of surface defects, which are further evaluated by solar-light-driven NO (ppb level) removal investigations. Results showed that ZnO rich in oxygen vacancies (VO-rich ZnO) exhibited 5.43 and 1.63 times enhanced NO removal with fewer toxic product NO2 formations than its counterparts pristine and VO-poor ZnO, respectively. Importantly, with higher VO on the unusual nonpolar facets, VO-rich ZnO does not only display enhanced NO conversion, but also shows the unselective NO removal process by producing NO3–. The plausible reaction mechanisms of promoted NO conversions are further investigated based on the surface VO, well-positioned band structures, and enhanced carrier separations. Results showed that the surface VO with gradient concentrations are not only promoted carrier separation, but also facilitate molecular oxygen activation, leading to the generations of strong oxidant superoxide radicals (·O2–), and contributing to the enhanced improved efficiency. Adsorption of small molecules (O2, H2O and NO) on the defective surface was further investigated by density functional theory (DFT) calculations, which validated the successful adsorption/activation of NO and O2, further contributed to the improved NO conversions.
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
刚刚
舒心的秋荷完成签到 ,获得积分10
3秒前
zz123发布了新的文献求助10
4秒前
liaomr完成签到 ,获得积分10
4秒前
粗犷的灵松完成签到,获得积分10
5秒前
吃小孩的妖怪完成签到 ,获得积分10
5秒前
ncuwzq完成签到,获得积分10
7秒前
yshj完成签到 ,获得积分10
8秒前
10秒前
净禅完成签到 ,获得积分10
12秒前
14秒前
迷人的寒风完成签到,获得积分10
15秒前
15秒前
water应助科研通管家采纳,获得10
16秒前
Lucas应助HHHAN采纳,获得10
18秒前
无情修杰完成签到 ,获得积分10
19秒前
小柒完成签到 ,获得积分10
21秒前
聪慧芷巧发布了新的文献求助10
22秒前
23秒前
27秒前
蓝意完成签到,获得积分0
28秒前
xiaohongmao完成签到,获得积分10
33秒前
36秒前
qweerrtt完成签到,获得积分10
43秒前
43秒前
与共发布了新的文献求助10
44秒前
carly完成签到 ,获得积分10
45秒前
颢懿完成签到 ,获得积分10
48秒前
量子星尘发布了新的文献求助10
49秒前
51秒前
ljc完成签到 ,获得积分10
52秒前
Java完成签到,获得积分10
56秒前
58秒前
鲤鱼安青完成签到 ,获得积分10
1分钟前
1分钟前
dollarpuff完成签到 ,获得积分10
1分钟前
1分钟前
mmmmmMM完成签到,获得积分10
1分钟前
luckweb完成签到,获得积分10
1分钟前
猫的毛完成签到 ,获得积分10
1分钟前
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 4038066
求助须知:如何正确求助?哪些是违规求助? 3575779
关于积分的说明 11373801
捐赠科研通 3305584
什么是DOI,文献DOI怎么找? 1819239
邀请新用户注册赠送积分活动 892655
科研通“疑难数据库(出版商)”最低求助积分说明 815022