☆ 4.8 Article

Selective photocatalytic oxidation of gaseous ammonia at ppb level over Pt and F modified TiO2

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

获取全文
添加到收藏夹

期刊

APPLIED CATALYSIS B-ENVIRONMENTAL
卷 300, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.apcatb.2021.120688

关键词

Selective photocatalytic oxidation; F or Pt modification; NH3 removal; NOx byproduct; N-2

类别

Chemistry, Physical Engineering, Environmental Engineering, Chemical

资金

  1. National Natural Science Foundation of China (NSFC) [22076224, 51572209, 51872341]
  2. Fundamental Research Funds for the Central Universities [20lgjc03, 19lgzd29]
  3. Tip-top Scientific and Technical Innovative Youth Talents of Guangdong Special Support Program [2019TQ05L196, 2019TQ05L143]
  4. Science and Technology Planning Project of Guangdong Province [2020A0505100033, 2021A1515010147]
  5. Open Fund of Guangdong Provincial Engineering Laboratory for Air Pollution Control and Guangdong Key Laboratory of Water and Air Pollution Control

向作者/读者索取更多资源

Protocol

社区支持

Reagent

社区支持

Surface fluorination and Pt deposition on TiO2 can reduce the formation of NOx during photocatalytic oxidation of low-concentration NH3, changing the photocatalytic pathway of NH3 conversion.
Ammonia (NH3) as an important precursor to form atmospheric fine particles and secondary inorganic aerosols, should be strictly controlled. Photocatalysis has provided a facile and an effective way to eliminate NH3 pollution under mild conditions, whereas the undesirable products, such as NO, NO2 would be generated during the reaction and the mechanism remains unclear. In this study, F or Pt modified TiO2 were explored to reduce the formation of NOx during photocatalytic oxidation of low-concentration NH3, and its photocatalytic activity, selectivity and mechanism of NH3 conversion were systematically studied. Results indicate that surface fluorination on TiO2 contribute to the reduction of noxious NOx, especially for NO2, since the modified TiO2 achieved enhanced adsorption of NH3 and strong electron-trapping ability, which can retard the recombination of photo generated electrons and holes. In addition, the deposition of Pt could further extend the lifetime of the electron hole pairs by strongly capture the electron, and enhance the oxidation of NH3 into nitrates and nitrites species. From the in-situ DRIFT spectroscopy and XPS results, we can deduce that reactive amino radical (center dot NH2) would be formed on TiO2 under photoirradiation after the adsorption of NH3 on Lewis acid cites. The formed center dot NH2 can react with reactive oxygen species in the presence of H2O, and produce NOx and HNOx. By both enhancing the adsorption of NH3 and separation efficiency of electron-hole pairs, the presence of F and Pt modification on the TiO2 changes the photocatalytic pathway of NH3 conversion. The proposed selective oxidation mechanism may offer a novel insight into the photocatalytic oxidation of atmospheric NH3 on other metal oxide with surface modification and can be broadly employed in air pollution control in indoor environments.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

Review Environmental Sciences

Comparison of separated and combined photodegradation and biofiltration technology for the treatment of volatile organic compounds: A critical review

Meng-Fei Han, Xu-Rui Hu, Yong-Chao Wang, Zhen Tong, Can Wang, Zhuo-Wei Cheng, Ke Feng, Miao-Miao Qu, Jian-Meng Chen, Ji-Guang Deng, Hsing-Cheng Hsi

Summary: Continuous emissions of VOCs from industrial processes pose serious environmental and health threats. Photodegradation and biofiltration technologies are efficient in controlling VOCs emissions. The combination of these technologies can overcome challenges faced by separate applications, making it a promising field for practical engineering.

CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY (2022)

添加到收藏夹
Article Chemistry, Multidisciplinary

Regulation of mixed Ag valence state by non-thermal plasma for complete oxidation of formaldehyde

Kai Li, Jian Ji, Yanling Gan, Haibao Huang

Summary: The valence state of silver plays a crucial role in the catalytic oxidation of formaldehyde. By employing non-thermal plasma and conventional calcination methods, researchers were able to regulate the valence state of silver and obtain a special mixed valence state with good activity and stability for the oxidation of formaldehyde.

CHINESE CHEMICAL LETTERS (2022)

添加到收藏夹
Review Engineering, Environmental

Catalytic ozonation of VOCs at low temperature: A comprehensive review

Biyuan Liu, Jian Ji, Boge Zhang, Wenjun Huang, Yanling Gan, Dennis Y. C. Leung, Haibao Huang

Summary: VOCs abatement has attracted increasing interest due to their detrimental effects on the environment and human health. Catalytic ozonation with the assistance of ozone is considered as a feasible and effective method for VOCs elimination. This review systematically reviews the emerging advances of catalytic ozonation of different VOCs and discusses the reaction mechanisms and influencing factors.

JOURNAL OF HAZARDOUS MATERIALS (2022)

添加到收藏夹
Article Chemistry, Physical

Effective regulation of surface bridging hydroxyls on TiO2 for superior photocatalytic activity via ozone treatment

Biyuan Liu, Boge Zhang, Jian Ji, Kai Li, Jianping Cao, Qiuyu Feng, Haibao Huang

Summary: Gas-solid and postsynthetic modification with ozone was used to enrich surface bridging hydroxyls (OHB) on TiO2, resulting in improved photoresponse and degradation efficiency. The increased OHB facilitated the transfer of photogenerated charge carriers and provided more adsorption sites for organic compounds, leading to enhanced catalytic activity and stability.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

添加到收藏夹
Article Environmental Sciences

Accelerated oxidation of VOCs via vacuum ultraviolet photolysis coupled with wet scrubbing process

Ruijie Xie, Dongxue Lei, Xiaowen Xie, Ziyi Suo, Dennis Y. C. Leung, Jianping Cao, Fang Ruimei, Haibao Huang

Summary: This study presents an efficient method for the removal of volatile organic compounds (VOCs) using a combination of vacuum ultraviolet (VUV) photolysis and wet scrubbing process. The synergistic effect between gas-phase and liquid-phase VUV photolysis contributes to the efficient removal of VOCs, with more than 96% removal efficiency achieved. The generation of O3 in gas-phase VUV photolysis enhances the production of HO' in liquid-phase VUV photolysis, leading to the degradation of VOCs and effective control of secondary pollution.

JOURNAL OF ENVIRONMENTAL SCIENCES (2023)

添加到收藏夹
Article Chemistry, Physical

Highly efficient ozone decomposition against harsh environments over long-term stable amorphous MnOx catalysts

Boge Zhang, Jian Ji, Biyuan Liu, Dengsong Zhang, Shuilian Liu, Haibao Huang

Summary: Ground-level ozone is harmful to ecosystems and human health and should be strictly controlled. A manganese oxide catalyst prepared through a simple redox reaction showed excellent ozone elimination performance, maintaining activity and stability even in harsh environmental conditions. The findings offer new insights for the design of efficient and stable catalysts and have potential for significant advancements in practical applications.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

添加到收藏夹
Article Chemistry, Physical

In situ evolved defective TiO2 as robust support for CoB-catalyzed hydrolysis of NaBH4

Jiale Shen, Danyun Xu, Jian Ji, Qicheng Zhang, Xiaobin Fan

Summary: A facile method is developed to synthesize defects-rich TiO2 supported CoB nanoparticles (CoB/TiO2-x) for efficient NaBH4 hydrolysis. The as-synthesized CoB/TiO2-x catalyst exhibits good catalytic performance with a hydrogen generation rate of 3070 mL min-1 gCo-1 and an activation energy of 57.03 kJ mol-1.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2023)

添加到收藏夹
Article Thermodynamics

Steady-state model for predicting size-resolved gas-particle partitioning of semi-volatile organic compounds (SVOCs) in indoor environments

Jianping Cao, Yu Han, Yujie Zhu, Xingyu Duan, Luyang Wang, Haibao Huang

Summary: This study developed a novel steady-state model to comprehensively simulate the gas-particle partitioning of indoor SVOCs by considering the effects of particle size distribution and air-change rate. The predictions of the novel model showed better agreement with experimental data.

BUILDING SIMULATION (2023)

添加到收藏夹
Article Construction & Building Technology

Role of dust loading in dynamic transport of semi-volatile organic compounds (SVOCs) into house dust: From multilayer to monolayer

Jianping Cao, Yuqing Zhu, Xinyi Huang, Li Zhang, Xuanhao Wang, Chuang Geng, Haibao Huang

Summary: House dust serves as an important medium for the transfer and storage of semi-volatile organic compounds (SVOCs) in indoor environments. The dust loading, or weight of dust per surface area, has been identified as a key factor influencing the transport of SVOCs into dust. This study proposes a mass transfer model that differentiates between SVOC diffusion distances in monolayer and multilayer dusts, providing a comprehensive understanding of dust loading effects. The model shows good agreement with measurements and allows for the determination of characteristic parameters of SVOCs in house dust. This study enhances our understanding of SVOC transport into house dust and enables accurate exposure assessment of indoor SVOCs.

BUILDING AND ENVIRONMENT (2023)

添加到收藏夹
Article Engineering, Environmental

Exceptional Ozone Decomposition over δ-MnO2/AC under an Entire Humidity Environment

Wenjing Dai, Boge Zhang, Jian Ji, Biyuan Liu, Ruijie Xie, Yanling Gan, Xiaowen Xie, Jiarui Zhang, Pingli Huang, Haibao Huang

Summary: In this study, an activated carbon supported delta-MnO2 catalyst with exceptional ozone decomposition capacity was synthesized. It remained stable under high humidity conditions and was able to quickly decompose ozone pollution to below safety levels in practical applications.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2023)

添加到收藏夹
Article Construction & Building Technology

Thermal desorption-based method for quantifying semi-volatile organic compounds in house dust: Method development and evaluation

Yuqing Zhu, Xinyi Huang, Chuang Geng, Jianping Cao

Summary: House dust is an important storage medium for assessing indoor SVOC pollution levels, traditionally quantified using solvent-extraction methods. This study proposed a TD-based method for SVOC quantification in house dust, which showed comparable accuracy and repeatability to the solvent-extraction method in laboratory experiments. In field tests, the TD-based method typically yielded higher SVOC concentrations, demonstrating its superior performance.

INDOOR AND BUILT ENVIRONMENT (2023)

添加到收藏夹
Article Thermodynamics

Characterization of time- and size-dependent particle emissions and decay from cooking oil fumes in residence: Impacts of various intervention measures

Jianbang Xiang, Linmin Hu, Jiayuan Hao, Siqing Wu, Jianping Cao, Edmund Seto

Summary: This study investigates the temporal profiles of particle number concentrations (PNCs) ranging from 0.3 to 10 μm during frying cooking activities in a naturally-ventilated apartment. The results show that opening the kitchen windows can significantly reduce the concentrations of particles in the size ranges of 0.3-2.5 μm, 2.5-10 μm, and 0.3-10 μm during and within 1 hour after cooking. The use of a venting range hood (VRH) can partially reduce the particle concentrations, and combining it with a portable air cleaner (PAC) further reduces the concentrations.

BUILDING SIMULATION (2023)

添加到收藏夹
Article Chemistry, Physical

Enhancing catalytic activity of zeolitic octahedral metal oxides through zinc incorporation for ethane oxidative dehydrogenation

Bolun Yu, Denan Li, Qianqian Zhu, Shufan Yao, Lifeng Zhang, Yanshuo Li, Zhenxin Zhang

Summary: This study successfully improved the catalytic activity of a zeolitic octahedral metal oxide by incorporating a single zinc species into its micropore. The zinc incorporation achieved a high ethane conversion rate and ethylene selectivity. Mechanism study showed that the isolated zinc site played a crucial role in activating oxygen and ethane, as well as stabilizing intermediates and transition states.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

添加到收藏夹
Article Chemistry, Physical

Unveiling the synergistic effect between the metallic phase and bridging S species over MoS2 for highly efficient nitrogen fixation

Ruoqi Liu, Hao Fei, Jian Wang, Ting Guo, Fangyang Liu, Zhuangzhi Wu, Dezhi Wang

Summary: This work successfully synthesized a high-performing S-enriched MoS2 catalyst for electrocatalytic nitrogen reduction reaction (NRR), demonstrating high activity and selectivity. The synergistic effect of the 1T phase and bridging S22- species was shown to play a positive role in NRR performances, and DFT calculations revealed the mechanism behind the improved performance.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

添加到收藏夹
Article Chemistry, Physical

Polymethylhydrosiloxane-modified gas-diffusion cathode for more efficient and durable H2O2 electrosynthesis in the context of water treatment

Pan Xia, Lele Zhao, Xi Chen, Zhihong Ye, Zhihong Zheng, Qiang He, Ignasi Sires

Summary: This study presents a modified gas-diffusion electrode (GDE) for highly efficient and stable H2O2 electrosynthesis by using trace polymethylhydrosiloxane (PMHS). DFT calculations provide an in-depth understanding of the roles of PMHS functional groups.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

添加到收藏夹
Article Chemistry, Physical

Boron-doped rGO electrocatalyst for high effective generation of hydrogen peroxide: Mechanism and effect of oxygen-enriched air

Kwangchol Ri, Songsik Pak, Dunyu Sun, Qiang Zhong, Shaogui Yang, Songil Sin, Leliang Wu, Yue Sun, Hui Cao, Chunxiao Han, Chenmin Xu, Yazi Liu, Huan He, Shiyin Li, Cheng Sun

Summary: Different B-doped rGO catalysts were synthesized and their 2e- oxygen reduction reaction (ORR) performance was investigated. It was found that the 2e- ORR selectivity of B-doped rGO was influenced by the B content and oxygen mass transfer conditions. The synthesized catalyst exhibited high 2e- ORR selectivity and was capable of degrading organic pollutants continuously.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

添加到收藏夹
Article Chemistry, Physical

Oxygen vacancies-modified S-scheme heterojunction of Bi-doped La2Ti2O7 and La-doped Bi4Ti3O12 to improve the NO gas removal avoiding NO2 product

Li Lv, Lin Lei, Qi-Wen Chen, Cheng-Li Yin, Huiqing Fan, Jian-Ping Zhou

Summary: Monoclinic phase La2Ti2O7 and orthorhombic phase Bi4Ti3O12 are widely used in photocatalysis due to their layered crystal structure. The electronic structures of these phases play a crucial role in their photocatalytic activity. Heat treatment in a nitrogen atmosphere introduces more oxygen vacancies into the S-scheme heterojunction, leading to enhanced NO removal efficiency.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

添加到收藏夹
Article Chemistry, Physical

Understanding the synergistic effect of hydrated electron generation from argon plasma catalysis over Bi2O3/CeO2 for perfluorooctanoic acid dehalogenation: Mechanism and DFT study

Choe Earn Choong, Minhee Kim, Jun Sup Lim, Young June Hong, Geon Joon Lee, Keun Hwa Chae, In Wook Nah, Yeomin Yoon, Eun Ha Choi, Min Jang

Summary: In this study, the synergistic effect between argon-plasma-system (AP) and catalysts in promoting the production of reactive species for water remediation was investigated. By altering the oxygen vacancies concentration of CeO2/Bi2O3 catalyst, the production of hydrated electrons was stimulated for PFOA removal. The results showed that the built-in electric field in the Bi/Ce0.43 interface enhanced electron migration and eaq- generation, leading to improved PFOA removal efficiency.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

添加到收藏夹
Article Chemistry, Physical

Ru clusters anchored on N-doped porous carbon-alumina matrix as efficient catalyst toward primary amines via reductive amination

Yushan Wu, Di Xu, Yanfei Xu, Xin Tian, Mingyue Ding

Summary: Efficient synthesis of primary amines from carbonyl compounds was achieved via reductive amination using Ru@NC-Al2O3 as a catalyst, exhibiting high activity and selectivity under mild conditions.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

添加到收藏夹
Article Chemistry, Physical

Efficient 1O2 production from H2O2 over lattice distortion controlled spinel ferrites

Yilan Jiang, Peifang Wang, Tingyue Chen, Keyi Gao, Yiran Xiong, Yin Lu, Dionysios D. Dionysiou, Dawei Wang

Summary: By controlling the content of Co and Ni in Co1-xNixFe2O4, the production of O-1(2) from H2O2 can be regulated. NiFe2O4, with the lowest lattice distortion degree, can efficiently produce O-1(2) as the dominant reactive oxygen species. The system also exhibits significant resistance to water matrix interference.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

添加到收藏夹
Article Chemistry, Physical

Tailoring the Mo-N/Mo-O configuration in MoO2/Mo2N heterostructure for ampere-level current density hydrogen production

Shuai Feng, Donglian Li, Hao Dong, Song Xie, Yaping Miao, Xuming Zhang, Biao Gao, Paul K. Chu, Xiang Peng

Summary: In this study, MoO2/Mo2N heterostructures were prepared by regulating the coordination of Mo atoms. The electrocatalyst exhibits high current density and excellent stability for hydrogen evolution reaction.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

添加到收藏夹
Article Chemistry, Physical

Spin state-tailored tetrahedral and octahedral cobalt centers on millimetric Co-Al oxide catalysts as dual sites for synergistic peroxymonosulfate activation

Jia-Cheng E. Yang, Min -Ping Zhu, Daqin Guan, Baoling Yuan, Darren Delai Sun, Chenghua Sun, Ming-Lai Fu

Summary: This study successfully modulated the electron configuration and spin state of millimetric metal catalysts by adjusting the support curvature radius. The electronic structure-oriented spin catalysis was found to affect the degradation of pollutants, providing new insights for the design and production of highly active, reusable, and stable catalysts.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

添加到收藏夹
Article Chemistry, Physical

Cu nanocrystals coupled with poly (heptazine imide) for synergistically enhanced photocatalytic CH3SH elimination: Facet engineering strengthened electron pump effect

Tao Zhong, Su Tang, Wenbin Huang, Wei Liu, Huinan Zhao, Lingling Hu, Shuanghong Tian, Chun He

Summary: In this study, a highly efficient photocatalyst for the elimination of CH3SH was developed by engineering different crystal facets and coupling them with PHI. Cu (111)/PHI exhibited the highest elimination efficiency and showed good stability and reusability. The enhanced surface electron pump effect and effective adsorption mechanisms were revealed through comprehensive characterizations and DFT calculations.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

添加到收藏夹
Article Chemistry, Physical

NiSn intermetallic nanoparticles with geometrically isolated Ni sites for selective C-O cleavage of furfural

Feifei Yang, Tianyu Zhang, Jiankang Zhao, Wei Zhou, Nicole J. Libretto, Jeffrey T. Miller

Summary: A Ni3Sn intermetallic nano particle was found to have geometrically isolated Ni sites that could selectively cleave C-O bonds in biomass derivatives. This nano particle showed high activity and selectivity towards 2-methylfuran, unlike Ni nanoparticles that produced other unwanted products derived from the aromatic rings.

APPLIED CATALYSIS B-ENVIRONMENTAL (2024)

添加到收藏夹
Article Chemistry, Physical

Nickel-facilitated in-situ surface reconstruction on spinel Co3O4 for enhanced electrochemical nitrate reduction to ammonia

Lulu Qiao, Di Liu, Anquan Zhu, Jinxian Feng, Pengfei Zhou, Chunfa Liu, Kar Wei Ng, Hui Pan

Summary: This study reveals that surface evolution plays a crucial role in enhancing the electrocatalytic performance of transition metal oxides for electrochemical nitrate reduction reaction (e-NO3RR). Incorporating nickel into Co3O4 can promote surface reconstruction and improve the adsorption of intermediates and reduce energy barriers, leading to enhanced catalytic performance. The reconstructed cobalt-nickel hydroxides (CoyNi1_y(OH)2) on the catalyst's surface serve as the active phase.

APPLIED CATALYSIS B-ENVIRONMENTAL (2024)

添加到收藏夹
Article Chemistry, Physical

Unraveling the discriminative mechanisms for peroxy activation via atomically dispersed Fe-N5 sites for tunable water decontamination

Xinyu Song, Yang Shi, Zelin Wu, Bingkun Huang, Xinhao Wang, Heng Zhang, Peng Zhou, Wen Liu, Zhicheng Pan, Zhaokun Xiong, Bo Lai

Summary: This study explores the discriminative activities and mechanisms for activation of O-O bond in peroxy compounds via single-atom catalysts (SACs) with higher coordination numbers (M-N5). The atomic catalyst (Fe-SAC) with Fe-N5 as the active center was constructed, effectively activating peroxymonosulfate (PMS), peroxydisulfate (PDS), and hydrogen peroxide (H2O2). The study demonstrates the degradation efficiencies of acyclovir are related to the O-O bond length in different peroxy compounds, and reveals the discriminative mechanisms for activation of O-O bond in different Fenton-like systems.

APPLIED CATALYSIS B-ENVIRONMENTAL (2024)

添加到收藏夹
Article Chemistry, Physical

Fe-Mn oxycarbide anchored on N-doped carbon for enhanced Fenton-like catalysis: Importance of high-valent metal-oxo species and singlet oxygen

Yangzhuo He, Hong Qin, Ziwei Wang, Han Wang, Yuan Zhu, Chengyun Zhou, Ying Zeng, Yicheng Li, Piao Xu, Guangming Zeng

Summary: A dual-metal-organic framework (MOF) assisted strategy was proposed to construct a magnetic Fe-Mn oxycarbide anchored on N-doped carbon for peroxymonosulfate (PMS) activation. The FeMn@NC-800 catalyst exhibited superior activity with almost 100% degradation of sulfamethazine (SMZ) in 30 minutes. The study provided insights for the rational design of high-performance heterogeneous catalysts and proposed a novel nonradical-based catalytic oxidation for environmental cleaning.

APPLIED CATALYSIS B-ENVIRONMENTAL (2024)

添加到收藏夹
研讨会 海报 问题 讨论圈 基金 期刊 论文 科研社交 资讯集成 审稿人 关于我们 常见问题 移动App 隐私条款 使用条款
© Peeref 2019-2024. All rights reserved.