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UV-LED/P25-based photocatalysis for effective degradation of isothiazolone biocide

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-020-1379-x

Abstract:

• UV-LED with shorter wavelength was beneficial for photocatalytic degradation.

Keywords： Degradation     Photocatalytic     LED     CMIT     P25    

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Photocatalysis: from solar light to hydrogen energy

Frontiers in Energy 2021, Volume 15, Issue 3,   Pages 565-567 doi: 10.1007/s11708-021-0784-6

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Organic conjugated polymers and polymer dots as photocatalysts for hydrogen production

Frontiers in Energy 2021, Volume 15, Issue 1,   Pages 667-677 doi: 10.1007/s11708-021-0767-7

Abstract: Owing to the outstanding characteristics of tailorable electronic and optical properties, semiconducting polymers have attracted considerable attention in recent years. Among them, organic polymer dots process large breadth of potential synthetic diversity are the representative of photocatalysts for hydrogen production, which presents both an opportunity and a challenge. In this mini-review, first, the organic polymer photocatalysts were introduced. Then, recent reports on polymer dots which showed a superior photocatalytic activity and a robust stability under visible-light irradiation, for hydrogen production were summarized. Finally, challenges and outlook on using organic polymer dots-based photocatalysts from hydrogen production were discussed.

Keywords： polymer dots (Pdots)     photocatalysis     hydrogen production    

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Metal-organic frameworks for CO

Lei ZHANG, Junqing ZHANG

Frontiers in Energy 2019, Volume 13, Issue 2,   Pages 221-250 doi: 10.1007/s11708-019-0629-8

Abstract: Metal-organic frameworks (MOFs) have attracted much attention because of their large surface areas, tunable structures, and potential applications in many areas. In recent years, MOFs have shown much promise in CO photoreduction. This review summarized recent research progresses in MOF-based photocatalysts for photocatalytic reduction of CO . Besides, it discussed strategies in rational design of MOF-based photocatalysts (functionalized pristine MOFs, MOF-photosensitizer, MOF- semiconductor, MOF-metal, and MOF-carbon materials composites) with enhanced performance on CO reduction. Moreover, it explored challenges and outlook on using MOF-based photocatalysts for CO reduction.

Keywords： metal-organic frameworks (MOFs)     photocatalysis     CO2 photoreduction     composite    

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Improving hole transfer of boron nitride quantum dots modified PDI for efficient photodegradation

Frontiers of Chemical Science and Engineering doi: 10.1007/s11705-023-2319-7

Abstract: photocatalytic design is capable of expanding organic semiconductors’ potential for their applications in photocatalysis

Keywords： PDI     boron nitride     quantum dots     photocatalysis     hole transfer    

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Layered alkali titanates (ATiO): possible uses for energy/environment issues

Frontiers in Energy 2021, Volume 15, Issue 3,   Pages 631-655 doi: 10.1007/s11708-021-0776-6

Abstract: Uses of layered alkali titanates (A2TinO2n+1; Na2Ti3O7, K2Ti4O9, and Cs2Ti5O11) for energy and environmental issues are summarized. Layered alkali titanates of various structural types and compositions are regarded as a class of nanostructured materials based on titanium oxide frameworks. If compared with commonly known titanium dioxides (anatase and rutile), materials design based on layered alkali titanates is quite versatile due to the unique structure (nanosheet) and morphological characters (anisotropic particle shape). Recent development of various synthetic methods (solid-state reaction, flux method, and hydrothermal reaction) for controlling the particle shape and size of layered alkali titanates are discussed. The ion exchange ability of layered alkali titanate is used for the collection of metal ions from water as well as a way of their functionalization. These possible materials design made layered alkali titanates promising for energy (including catalysis, photocatalysts, and battery) and environmental (metal ion concentration from aqueous environments) applications.

Keywords： layered alkali titanates     photocatalysis     hydrogen evdution     metal ions collection    

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Recent advances of hydrogen production through particulate semiconductor photocatalytic overall water splitting

Frontiers in Energy 2022, Volume 16, Issue 1,   Pages 49-63 doi: 10.1007/s11708-022-0817-9

Abstract: Solar energy-driven photocatalytic water splitting has been investigated for decades to produce clean and renewable green hydrogen. In this paper, the cutting-edge research within the overall water splitting system is summarized from the one-step photocatalytic overall water splitting (POWS) system to the two-step system and the cocatalysts research in this field. In addition, the photocatalytic reaction engineering study is also reviewed which is crucial for future scale-up. This mini-review provides a picture of survey of recent progress of relevant overall water splitting system, with particular attention paid to material system and mechanistic breakthroughs, and highlights the challenge and opportunity of the current system.

Keywords： photocatalysis     overall water splitting     hydrogen    

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Function-reversible facets enabling SrTiO nanocrystals for improved photocatalytic hydrogen evolution

Frontiers in Energy doi: 10.1007/s11708-023-0894-4

Abstract: It has been widely reported that, for faceted nanocrystals, the two adjacent facets with different band levels contribute to promoted charge separation, and provide active sites for photocatalytic reduction and oxidation reaction, respectively. In such cases, only one family of facets can be used for photocatalytic hydrogen evolution. Herein, by using SrTiO3 nanocrystals enclosed by {023} and {001} facets as a model photocatalyst, this paper proposed a strategy to achieve the full-facets-utilization of the nanocrystals for photocatalytic hydrogen via chemically depositing Pt nanoparticles on all facets. The photo-deposition experiment of CdS provided direct evidence to demonstrate that the {023} facets which were responsible for photooxidation reaction can be function-reversed for photocatalytic hydrogen evolution after depositing Pt nanoparticles, together with the {001} facets. Thus, the full-facets-utilization led to a much-improved activity for photocatalytic hydrogen, in contrast to those SrTiO3 nanocrystals with only {001} facets deposited by Pt nanoparticles via a photo-deposition method.

Keywords： SrTiO3 nanocrystals     crystal facets     photocatalysis     hydrogen evolution    

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Z-scheme CdS/WO on a carbon cloth enabling effective hydrogen evolution

Frontiers in Energy 2021, Volume 15, Issue 3,   Pages 678-686 doi: 10.1007/s11708-021-0768-6

Abstract: Photocatalytic water splitting for hydrogen (H2) generation is a potential strategy to solve the problem of energy crisis and environmental deterioration. However, powder-like photocatalysts are difficult to recycle, and the agglomeration of particles would affect the photocatalytic activity. Herein, a direct Z-scheme CdS/WO3 composite photocatalyst was fabricated based on carbon cloth through a two-step process. With the support of carbon cloth, photocatalysts tend to grow uniformly for further applications. The experimental results showed that the H2 yield of adding one piece of CdS/WO3 composite material was 17.28 μmol/h, which was 5.5 times as compared to that of pure CdS-loaded carbon cloth material. A cycle experiment was conducted to verify the stability of the as-prepared material and the result demonstrated that the H2 generation performance of CdS/WO3 decreased slightly after 3 cycles. This work provides new ideas for the development of recyclable photocatalysts and has a positive significance for practical applications.

Keywords： photocatalysis     CdS/WO3     carbon cloth     Z-scheme     hydrogen evolution    

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DEGRADATION OF ORGANIC POLLUTANTS IN FLOCCULATED LIQUID DIGESTATE USING PHOTOCATALYTIC TITANATE NANOFIBERS: MECHANISM AND RESPONSE SURFACE OPTIMIZATION

Frontiers of Agricultural Science and Engineering doi: 10.15302/J-FASE-2023503

Abstract:

● Titanate NFs were synthesized and photodegraded liquid digestate for the first time.

Keywords： titanate nanofibers     photocatalysis     poultry litter liquid digestate    

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Photo-induced surface frustrated Lewis pairs for promoted photocatalytic decomposition of perfluorooctanoic acid

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 1, doi: 10.1007/s11783-023-1603-6

Abstract:

● Terminal carboxylate group activation is PFOA degradation’s rate-limiting step.

Keywords： Heterogeneous photocatalysis     Surface frustrated Lewis pairs     Perfluorooctanoic acid     Defluorination    

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Response of bioaerosol cells to photocatalytic inactivation with ZnO and TiO impregnated onto Perlite and Poraver carriers

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 3, doi: 10.1007/s11783-020-1335-9

Abstract:

•ZnO/Perlite inactivated 72% of bioaerosols in continuous gas phase.

Keywords： Immobilized catalysts     Continuous flow     Photocatalysis     Bioaerosols     Cytotoxicity     Inactivation mechanism    

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Selective reduction of NO by photo-SCR with ammonia in an annular fixed-film photoreactor

YiangChen CHOU, Young KU

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 2,   Pages 149-155 doi: 10.1007/s11783-010-0296-9

Abstract: Gaseous NO was photocatalytically reduced at room temperature by photo-assisted selective catalytic reduction (photo-SCR) with ammonia over TiO in this study. NO reduction efficiency and N selectivity were determined from gases composition at the outlet stream of photoreactor. Effect of operating conditions, e.g. light intensity and inlet concentrations of ammonia and oxygen, on the NO reduction efficiency and N selectivity were discussed to determine the feasible operating condition for photocatalytic reduction of NO. Experimental results showed that selective catalytic reduction of NO with ammonia over TiO in the presence of oxygen was a spontaneous reaction in dark. The photoirradiation on the TiO surface caused remarkable photocatalytic reduction of NO to form N , NO , and N O under 254 nm UV illuminations, while almost 90% of N selectivity was achieved in this study. The ammonia and oxygen molecules played the roles of reductant and oxidant for NO reduction and active sites regeneration, respectively. The reduction of NO was found to be increased with the increase of inlet ammonia and oxygen concentrations until specific concentrations because of the limited active sites on the surface of TiO . The kinetic model proposed in this study can be used to reasonably describe the reaction mechanism of photo-SCR.

Keywords： photo-SCR     photocatalysis     NO reduction     Eley-Rideal model    

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Low temperature synthesis of visible light responsive rutile TiO

John TELLAM, Xu ZONG, Lianzhou WANG

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 1,   Pages 53-57 doi: 10.1007/s11705-011-1165-1

Abstract: A nano-structured TiO with rutile phase was synthesized by using the hydrothermal method from a titanium carbide (TiC) nano-powder precursor at low temperature to produce a stable visible light responsive photocatalyst. The rutile phase was formed at temperature as low as 100°C, and both synthesis time and temperature affected its formation. The rutile particles showed a faceted nano-rod structure, and were tested for absorption and photo-degradation ability under visible light. Particles with shorter synthesis times showed higher visible light absorption and corresponding photo-degradation ability, while those synthesized at lower temperatures had lower, but still evident, degradation ability under visible light.

Keywords： photocatalysis     rutile     TiO2     hydrothermal     visible     titanium carbide    

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Research progress of defect-engineered UiO-66(Zr) MOFs for photocatalytic hydrogen production

Frontiers in Energy 2021, Volume 15, Issue 3,   Pages 656-666 doi: 10.1007/s11708-021-0765-9

Abstract: In recent years, defect-engineered Zr-based UiO-66 metal-organic frameworks (UiO-66(Zr) metal-organic frameworks (MOFs)) have shown huge advantages in catalytic, functional materials, adsorption, and other fields due to their large surface areas, well-ordered porous structures, and flexible tailorability. It is extremely challenging to introduce defect sites in the synthesis of MOFs to regulate the physicochemical properties of materials such as (energy band structure, pore structure, etc.) to obtain an excellent performance. This paper reviews the recent research results of synthesis methods, characterization technologies, and application fields of defect-engineered UiO-66(Zr) MOFs materials in order to provide new insights to synthesize high-performance UiO-66(Zr) MOFs materials and promote the development of UiO-66(Zr) in various fields.

Keywords： defect engineering     metal-organic frameworks     UiO-66     photocatalysis    

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Title Author Date Type Operation

UV-LED/P25-based photocatalysis for effective degradation of isothiazolone biocide

Journal Article

Photocatalysis: from solar light to hydrogen energy

Journal Article

Organic conjugated polymers and polymer dots as photocatalysts for hydrogen production

Journal Article

Metal-organic frameworks for CO

Lei ZHANG, Junqing ZHANG

Journal Article

Improving hole transfer of boron nitride quantum dots modified PDI for efficient photodegradation

Journal Article

Layered alkali titanates (ATiO): possible uses for energy/environment issues

Journal Article

Recent advances of hydrogen production through particulate semiconductor photocatalytic overall water splitting

Journal Article

Function-reversible facets enabling SrTiO nanocrystals for improved photocatalytic hydrogen evolution

Journal Article

Z-scheme CdS/WO on a carbon cloth enabling effective hydrogen evolution

Journal Article

DEGRADATION OF ORGANIC POLLUTANTS IN FLOCCULATED LIQUID DIGESTATE USING PHOTOCATALYTIC TITANATE NANOFIBERS: MECHANISM AND RESPONSE SURFACE OPTIMIZATION

Journal Article

Photo-induced surface frustrated Lewis pairs for promoted photocatalytic decomposition of perfluorooctanoic acid

Journal Article

Response of bioaerosol cells to photocatalytic inactivation with ZnO and TiO impregnated onto Perlite and Poraver carriers

Journal Article

Selective reduction of NO by photo-SCR with ammonia in an annular fixed-film photoreactor

YiangChen CHOU, Young KU

Journal Article

Low temperature synthesis of visible light responsive rutile TiO

John TELLAM, Xu ZONG, Lianzhou WANG

Journal Article

Research progress of defect-engineered UiO-66(Zr) MOFs for photocatalytic hydrogen production

Journal Article