Composite photocatalysts based on TiO2 - carbon for air pollutant removal: Aspects of adsorption

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F20%3A43918688" target="_blank" >RIV/60461373:22310/20:43918688 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22350/20:43918688

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0920586118306278" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0920586118306278</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cattod.2018.09.027" target="_blank" >10.1016/j.cattod.2018.09.027</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Composite photocatalysts based on TiO2 - carbon for air pollutant removal: Aspects of adsorption

Popis výsledku v původním jazyce

Immobilized composite powders of titania with various carbon content were tested with respect to their efficiency of degradation of impurities in air (toluene, acetaldehyde, NO) under UVA illumination in a single-pass flow-through reactor and ISO conditions. Addition of active carbon (AC) to titania resulted in increased conversion efficiencies of some pollutants. In the case of toluene as a test pollutant, an AC/TiO2 ratio of 0.23 in the photocatalyst led to 47% conversion efficiency (against 36% without carbon). The presence of water in the gaseous reaction mixture was found to be essential for the degradation reactions to occur with an optimum at 50% RH. In gas phase degradation experiments with NO, a carbon to titania ratio of 0.7 led to the best results. For long time irradiation, accumulation of one of the reaction products, HNO3, in the catalyst layer was noticed resulting in a lower production of NO2. Photocatalytic removal of acetaldehyde was not improved by carbon loading; pure titania showed already a conversion efficiency of 75%. In general, although carbon loading helped in adsorption and preconcentration of pollutants, light absorption by carbon counteracted this effect

Název v anglickém jazyce

Composite photocatalysts based on TiO2 - carbon for air pollutant removal: Aspects of adsorption

Popis výsledku anglicky

Immobilized composite powders of titania with various carbon content were tested with respect to their efficiency of degradation of impurities in air (toluene, acetaldehyde, NO) under UVA illumination in a single-pass flow-through reactor and ISO conditions. Addition of active carbon (AC) to titania resulted in increased conversion efficiencies of some pollutants. In the case of toluene as a test pollutant, an AC/TiO2 ratio of 0.23 in the photocatalyst led to 47% conversion efficiency (against 36% without carbon). The presence of water in the gaseous reaction mixture was found to be essential for the degradation reactions to occur with an optimum at 50% RH. In gas phase degradation experiments with NO, a carbon to titania ratio of 0.7 led to the best results. For long time irradiation, accumulation of one of the reaction products, HNO3, in the catalyst layer was noticed resulting in a lower production of NO2. Photocatalytic removal of acetaldehyde was not improved by carbon loading; pure titania showed already a conversion efficiency of 75%. In general, although carbon loading helped in adsorption and preconcentration of pollutants, light absorption by carbon counteracted this effect

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

<a href="/cs/project/LTACH17007" target="_blank" >LTACH17007: Kompozitní fotokatalyzátory na bázi TiO2 - aktivní uhlí pro čištění vody a vzduchu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Catalysis Today

ISSN

0920-5861

e-ISSN

—

Svazek periodika

340

Číslo periodika v rámci svazku

15

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

39

Strana od-do

34

Kód UT WoS článku

000491876500006

EID výsledku v databázi Scopus

2-s2.0-85055178024