Facet-dependent performance of anatase TiO2 for photocatalytic oxidation of gaseous ammonia

Chen, Min; Ma, Jinzhu; Zhang, Bo; Wang, Fei; Li, Yaobin; Zhang, Changbin; He, Hong

doi:10.1016/j.apcatb.2017.04.012

Cited by 71 publications

(42 citation statements)

References 49 publications

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“…These can either recombine, or migrate to the particle's surface, where they can generate ROS and/or activate redox processes. [ 52 ] The plausible mechanisms of photogeneration of various forms of ROS during the UV‐light induced stepwise oxidation of water (H 2 O), and stepwise reduction of oxygen (O 2 ) taking place on the surface of the TiO 2 NWs, are schematically illustrated in Figure 2b.…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic Nanowires‐Based Air Filter: Towards Reusable Protective Masks

Horváth

Rossi

Mercier

et al. 2020

Adv Funct Materials

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In the last couple decades, several viral outbreaks resulting in epidemics and pandemics with thousands of human causalities have been witnessed. The current Covid-19 outbreak represents an unprecedented crisis. In stopping the virus' spread, it is fundamental to have personal protective equipment and disinfected surfaces. Here, the development of a TiO 2 nanowires (TiO 2 NWs) based filter is reported, which it is believed will work extremely well for personal protective equipment (PPE), as well as for a new generation of air conditioners and air purifiers. Its efficiency relies on the photocatalytic generation of high levels of reactive oxygen species (ROS) upon UV illumination, and on a particularly high dielectric constant of TiO 2 , which is of paramount importance for enhanced wettability by the water droplets carrying the germs. The filter pore sizes can be tuned by processing TiO 2 NWs into filter paper. The kilogram-scale production capability of TiO 2 NWs gives credibility to its massive application potentials.

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Section: Resultsmentioning

confidence: 99%

Photocatalytic Nanowires‐Based Air Filter: Towards Reusable Protective Masks

Horváth

Rossi

Mercier

et al. 2020

Adv Funct Materials

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“…The diffraction peaks at 2q = 25.2 , 37.8 , 48.1 , 54.0 , 55.1 , 62.8 , 68.9 , 70.4 , and 75.2 are assigned to the reflections from the (101), (004), (200), (105), (211), (204), (116), (220), and (215) crystal planes of anatase TiO 2 (JCPDS No. 21-1272), respectively (Chen et al, 2018a). The small diffraction peaks at 37.1 , 45.8 , and 66.8 are attributed to the reflections from the (311), (400), and (440) crystal planes of g-Al 2 O 3 (JCPDS No.29-0063), respectively (Xiong et al, 2019).…”

Section: Synthesis and Characterization Of The Metal-oxide Nanocomposmentioning

confidence: 99%

Controlling Deoxygenation Pathways in Catalytic Fast Pyrolysis of Biomass and Its Components by Using Metal-Oxide Nanocomposites

Zheng¹,

Huang²,

Wei

et al. 2020

iScience

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Selectively breaking the CO bonds within biomass during catalytic fast pyrolysis (CFP) is desired, but extremely challenging. Herein, we develop a series of metal-oxide nanocomposites composed of W, Mo, Zr, Ti, or Al. It is demonstrated that the nanocomposites of WO 3-TiO 2-Al 2 O 3 exhibit the highest deoxygenation ability during CFP of lignin, which can compete with the commercial HZSM-5 catalyst. The nanocomposites can selectively cleave the CO bonds within lignin-derived phenols to form aromatics by direct demethoxylation and subsequent dehydration. Moreover, the nanocomposites can also achieve the selective breaking of the CO bonds within xylan and cellulose to form furans by dehydration. The Brønsted and Lewis acid sites on the nanocomposites can be responsible for the deoxygenation of lignin and polysaccharides, respectively. This study provides new insights for the rational design of multifunctional catalysts that are capable of simultaneously breaking the CO bonds within lignin and polysaccharides.

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“…The inorganic–organic CdS–DETA nanocrystals as the precursors were first prepared, owing to their special nanobelt structure and multiple surface radicals, which facilitate materials composition. The F–TiO 2 NSs with a highly active exposed {0 0 1} plane provide superior enhanced separation efficiency of the photoexcited carriers . Furthermore, the in situ growth offers a simple and effective approach for forming high-quality interfacial contacts with atomic precision between these two semiconductors .…”

Section: Introductionmentioning

confidence: 99%

“…The F−TiO 2 NSs with a highly active exposed {0 0 1} plane provide superior enhanced separation efficiency of the photoexcited carriers. 42 Furthermore, the in situ growth offers a simple and effective approach for forming high-quality interfacial contacts with atomic precision between these two semiconductors. 43 Third, the large heterojunction area will supply more carrier transfer channel.…”

Section: ■ Introductionmentioning

confidence: 99%

Efficient Visible-Light-Driven Splitting of Water into Hydrogen over Surface-Fluorinated Anatase TiO₂ Nanosheets with Exposed {001} Facets/Layered CdS–Diethylenetriamine Nanobelts

Dai

Zhang

et al. 2018

ACS Sustainable Chem. Eng.

154

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Cadmium sulfide (CdS), is one of the superior visible-light-driven photocatalysts, and has a prosperous and practical future in hydrogen (H2) production from water splitting for addressing environmental problems, such as environmental contamination and energy shortage. But the inherent serious drawback of photocorrision always limits its photocatalytic performance. Here, we fabricated a layered nanojunction to enhance the H2 generation of the surface-fluorinated TiO2/CdS–diethylenetriamine (F–TiO2/CdS–DETA) system. The loading of F–TiO2 nanosheets (NSs) with exposed {001} facets on inorganic–organic CdS–DETA nanobelts (NBs) greatly improves the interfacial contact. The layered nanojunction structure efficiently inhibits the charge carriers’ recombination and enhances the H2 production stability of CdS. At an optimal ratio of 30%F–TiO2, the F–TiO2/CdS–DETA composite exhibits the highest H2 production rate of 8342.86 μmol h–1 g–1, which is 6.6 times and 1.7 times as high as that of CdS nanoparticles and CdS–DETA NBs, respectively. The apparent quantum yield of the H2 evolution system reaches 24.9% at 420 nm with a Pt cocatalyst. More importantly, the surface of the F–TiO2 nanosheets enriches a large amount of trapping centers of photogenerated holes, which can thus efficiently promote the charge carriers’ separation and enhance the photocatalytic H2 evolution of CdS–DETA. Also, the effective charges transfer route of F–TiO2/CdS–DETA is also demonstrated by a photoluminescence test and photocurrent response. This work provides an ideal model for the design of stable and efficient H2 production photocatalysts.

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Facet-dependent performance of anatase TiO2 for photocatalytic oxidation of gaseous ammonia

Cited by 71 publications

References 49 publications

Photocatalytic Nanowires‐Based Air Filter: Towards Reusable Protective Masks

Photocatalytic Nanowires‐Based Air Filter: Towards Reusable Protective Masks

Controlling Deoxygenation Pathways in Catalytic Fast Pyrolysis of Biomass and Its Components by Using Metal-Oxide Nanocomposites

Efficient Visible-Light-Driven Splitting of Water into Hydrogen over Surface-Fluorinated Anatase TiO₂ Nanosheets with Exposed {001} Facets/Layered CdS–Diethylenetriamine Nanobelts

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Facet-dependent performance of anatase TiO2 for photocatalytic oxidation of gaseous ammonia

Cited by 71 publications

References 49 publications

Photocatalytic Nanowires‐Based Air Filter: Towards Reusable Protective Masks

Photocatalytic Nanowires‐Based Air Filter: Towards Reusable Protective Masks

Controlling Deoxygenation Pathways in Catalytic Fast Pyrolysis of Biomass and Its Components by Using Metal-Oxide Nanocomposites

Efficient Visible-Light-Driven Splitting of Water into Hydrogen over Surface-Fluorinated Anatase TiO2 Nanosheets with Exposed {001} Facets/Layered CdS–Diethylenetriamine Nanobelts

Contact Info

Product

Resources

About

Efficient Visible-Light-Driven Splitting of Water into Hydrogen over Surface-Fluorinated Anatase TiO₂ Nanosheets with Exposed {001} Facets/Layered CdS–Diethylenetriamine Nanobelts