{"title":"Role of SiO2 in TiO2/SiO2 photocatalyst for hydrogen peroxide gas generation from air humidity via photocatalysis","authors":"Tanongsak Sukkasem, Aroonsri Nuchitprasittichai, Supunnee Junpirom, Nattapat Pulsawat, Poonyapath Khumronrith, Sirawit Photongngam, Pattanapong Janphuang","doi":"10.1007/s10847-023-01211-3","DOIUrl":null,"url":null,"abstract":"<div><p>This work aims to study the production of hydrogen peroxide gas (H<sub>2</sub>O<sub>2</sub>) through photocatalysis. It consists of two main parts. In the first part, we explore the optimal conditions for synthesizing H<sub>2</sub>O<sub>2</sub> gas from humidity using a gas system photoreactor. Through experimentation, we discovered that the fabricated photoreactor, equipped with three series of coated photocatalyst-supporting plates, can synthesize H<sub>2</sub>O<sub>2</sub> gas up to 3 ppmv. The photoreactor incorporates key components, including a photocatalyst material, UV light source, ventilation fan, and air filter. The identified optimal conditions included a relative humidity of 60‒65% RH and an air flow rate of 12.0 m/s. The TiO<sub>2</sub>/1%SiO<sub>2</sub> photocatalyst, composed of SiO<sub>2</sub> particles smaller than 63 μm, yielded the most favorable results. The second part focused on studying the role of SiO<sub>2</sub> in TiO<sub>2</sub>/SiO<sub>2</sub>. We observed that modifying the TiO<sub>2</sub> morphology with SiO<sub>2</sub> created a pore structure on the surface. This structural modification leads to the formation of Ti‒O‒Si bonds, which facilitate electron and hole trapping on the photocatalyst surface. Furthermore, the presence of hydroxyl groups on the surface enhanced the attraction of reactant molecules. XRD results reveal a mixed-phase structure of TiO<sub>2</sub> (anatase‒rutile)/SiO<sub>2</sub> amorphous, contributing to improved electron and hole pathways within the photocatalyst.</p><h3>Graphical abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":638,"journal":{"name":"Journal of Inclusion Phenomena and Macrocyclic Chemistry","volume":null,"pages":null},"PeriodicalIF":2.3000,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Inclusion Phenomena and Macrocyclic Chemistry","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10847-023-01211-3","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Agricultural and Biological Sciences","Score":null,"Total":0}
引用次数: 0
Abstract
This work aims to study the production of hydrogen peroxide gas (H2O2) through photocatalysis. It consists of two main parts. In the first part, we explore the optimal conditions for synthesizing H2O2 gas from humidity using a gas system photoreactor. Through experimentation, we discovered that the fabricated photoreactor, equipped with three series of coated photocatalyst-supporting plates, can synthesize H2O2 gas up to 3 ppmv. The photoreactor incorporates key components, including a photocatalyst material, UV light source, ventilation fan, and air filter. The identified optimal conditions included a relative humidity of 60‒65% RH and an air flow rate of 12.0 m/s. The TiO2/1%SiO2 photocatalyst, composed of SiO2 particles smaller than 63 μm, yielded the most favorable results. The second part focused on studying the role of SiO2 in TiO2/SiO2. We observed that modifying the TiO2 morphology with SiO2 created a pore structure on the surface. This structural modification leads to the formation of Ti‒O‒Si bonds, which facilitate electron and hole trapping on the photocatalyst surface. Furthermore, the presence of hydroxyl groups on the surface enhanced the attraction of reactant molecules. XRD results reveal a mixed-phase structure of TiO2 (anatase‒rutile)/SiO2 amorphous, contributing to improved electron and hole pathways within the photocatalyst.
期刊介绍:
The Journal of Inclusion Phenomena and Macrocyclic Chemistry is the premier interdisciplinary publication reporting on original research into all aspects of host-guest systems. Examples of specific areas of interest are: the preparation and characterization of new hosts and new host-guest systems, especially those involving macrocyclic ligands; crystallographic, spectroscopic, thermodynamic and theoretical studies; applications in chromatography and inclusion polymerization; enzyme modelling; molecular recognition and catalysis by inclusion compounds; intercalates in biological and non-biological systems, cyclodextrin complexes and their applications in the agriculture, flavoring, food and pharmaceutical industries; synthesis, characterization and applications of zeolites.
The journal publishes primarily reports of original research and preliminary communications, provided the latter represent a significant advance in the understanding of inclusion science. Critical reviews dealing with recent advances in the field are a periodic feature of the journal.