New insights into the synergistic effect of active radicals and adsorptive ability on the photodegradation of gaseous acetaldehyde over reduced graphene Oxide/P25 composite

Zeng, Qinglong; Xie, Xiaofeng; Wang, Xiao; Lu, Guolin; Li, Haiwei; Lee, Shuncheng; Sun, Jing

doi:10.1016/j.jhazmat.2019.120814

Cited by 18 publications

(8 citation statements)

References 41 publications

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“…Furthermore, efficient charge transfer between ZnO nanomaterials and conductive dopants leads to faster photocurrent generation and the optical absorption is presumably shifting toward the visible region by the doping method. 84 , 85 Therefore, rGO with excellent conductivity and other advantages was chosen as the dopant and deposition material for the bi-composite. The heterostructure and morphology of CKZ with rGO (5 wt %) dopant are displayed in Figure 4 .…”

Section: Results and Discussionmentioning

confidence: 99%

Entangled ZnO on Ultrathin Hollow Fibers for UV-Aided Pollutant Decomposition

Chalmers

et al. 2022

ACS Appl. Mater. Interfaces

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Zinc oxide (ZnO), a widely used ultraviolet (UV) degrading substance, offers high selectivity for wastewater treatment, but the leaching of ZnO into water could cause secondary contamination. Using porous substrates to fix and load ZnO is a promising technical method to improve the water purification efficiency and recycling durability of ZnO. However, limited by the slow kinetics and shielding effects, it is challenging to use traditional techniques to introduce ZnO into the interior of a hollow structure. Here, inspired by an ancient dyeing procedure, we formed a unique single-molecule bio-interfacial entanglement as an absorption layer to capture the catalyst for ZnO electroless deposition (ELD) on the surface of natural ultrathin hollow-structured Kapok fibers. With curcumin serving as a linking bridge, ELD allowed the spontaneous formation of intensive ZnO nanocrystals on both the outer and inner walls. ZnO-kapok as the catalyst for ultraviolet photodecomposition of organic pollutants (methylene blue (MB) and phenol as model pollutants) delivered a decomposition efficiency of 80% and outstanding durability. Further modification of the ZnO-kapok catalyst by doping with reduced graphene oxide (rGO) showed an improvement in photodegradation performance of 90% degradation under 2-h irradiation with 21.85 W/dm 2 light power. Moreover, to the best of our knowledge, this is the first report featuring ZnO loading on both the outer and inner walls of a fiber-structured hollow kapok material, which provides inspiration for immobilization of metallic oxides on hollow-structured materials for further applications in renewable catalysis, chemical engineering, and energy storage fields.

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Section: Results and Discussionmentioning

confidence: 99%

Entangled ZnO on Ultrathin Hollow Fibers for UV-Aided Pollutant Decomposition

Chalmers

et al. 2022

ACS Appl. Mater. Interfaces

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“…However, the hyperbranched PDAs are acquired as black powders with metallic clusters; they were leached into N , N -dimethylacetamide (DMAc) and tetrahydrofuran (THF) and exhibited strong red fluorescence emission and excellent film processability (Figure a), which are essential for further preparation of a multicomponent photoelectrocatalyst complex . Moreover, apparent light-harvesting was the amount of photoelectron-conversion and accessible light utilization as well . Ultraviolet–visible (UV–vis) spectra of the CPs 1 – 6 show broad absorption peaks in the visible region and even in the near-infrared region and good for a strong photon harvest in the infrared light region …”

Section: Resultsmentioning

confidence: 99%

“…This is due to increasing reactivity of PDA-based long-chain groups as well as their good solubilities in the system. Coupling of the PDA-based complex with RGO improved their apparent light harvesting thanks to their dark appearance …”

Section: Resultsmentioning

confidence: 99%

Enhanced Visible-Light Photoelectrocatalytic Activity over a Polydiacetylene-Based Metal Complex with RGO Modified under Wastewater

Huo

Lin

Tang

2020

ACS Appl. Polym. Mater.

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The polydiacetylene (PDA) composite 6 obtained in this study displayed superior photoelectrochemical (PEC) activity (4.37 mL cm −2 h −1 ) for hydrogen generation from wastewater, and it showed photoelectrocatalytic stability for over 18 h. Reduced graphene oxide (RGO) was interweaved with both the Mn-complex and the PDA-based backbone, resulting in a record-breaking H 2 production rate, which was retained even after 5000 bending cycles.

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“…Long-term exposure may be responsible for laryngeal or nasal cancerous tumors [ 72 , 73 ]. The photocatalytic activity of rGO-TiO 2 [ 74 ] and TiO 2 /TaS 2 [ 75 ] was evaluated under a 260 W Vis light source using 500 ppm acetaldehyde. The rGO-TiO 2 with a sheet-like morphology was obtained by the ultrasonication method.…”

Section: Voc Removal Using Heterostructures/composites/doped Photomentioning

confidence: 99%

Volatile Organic Compounds (VOCs) Removal from Indoor Air by Heterostructures/Composites/Doped Photocatalysts: A Mini-Review

Eneşca

Cazan

2020

Nanomaterials

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The impact of volatile organic compounds (VOCs) on indoor air quality and, furthermore, on human health is still a subject of research investigations considering the large increase in forms of cancer and related diseases. VOCs can be 10 times higher in indoor air concentrations then that of the outdoors, as a consequence of emissions from electronics, building materials and consumer goods. Direct transformation of VOCs in mineralization products seems to be an alternative to reduce indoor air contaminants. The advantage of photocatalysis implementation in indoor air treatment is given by the absence of additional chemicals (such as H2O2) and waste. The present mini-review presents a comparative study on VOCs photocatalytic removal considering the photocatalyst composition, morphology and specific surface. The sheet-like morphology seems to provide a higher number of active sites which may contribute to oxidative reactions. The insertion of materials able to increase light absorbance or to mediate the charge carrier’s transport will have a beneficial impact on the overall photocatalytic efficiency. Additionally, surface chemistry must be considered when developing photocatalysts for certain gas pollutants in order to favor molecule absorbance in the interfacial region. An energy consumption perspective is given based on the light intensity and irradiation period.

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New insights into the synergistic effect of active radicals and adsorptive ability on the photodegradation of gaseous acetaldehyde over reduced graphene Oxide/P25 composite

Cited by 18 publications

References 41 publications

Entangled ZnO on Ultrathin Hollow Fibers for UV-Aided Pollutant Decomposition

Entangled ZnO on Ultrathin Hollow Fibers for UV-Aided Pollutant Decomposition

Enhanced Visible-Light Photoelectrocatalytic Activity over a Polydiacetylene-Based Metal Complex with RGO Modified under Wastewater

Volatile Organic Compounds (VOCs) Removal from Indoor Air by Heterostructures/Composites/Doped Photocatalysts: A Mini-Review

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