Photodegradation of Nitrogen Oxide under Solar Light Using a Facile Synthesis Catalyst

Abstract

NOx is becoming a hot issue due to its contribution to ozone, PM2.5 formation, and its negative impacts on the ecosystem. In this study, the synthesis of an MgO/Bi2S3-BiOCl composite was carried out via the co-precipitation method for the photodegradation of nitrogen oxide (NO) under solar light. The BiOCl heterojunction is a result of interactions between the Bi2S3 solution and the MgCl2.6H2O precursor. This BiOCl heterojunction provides more available active species that enhance the degradation of NO. The successful synthesis of this composite using a co-precipitation method was confirmed by different characterization analyses (XRD, FTIR, SEM, TEM, DRS, and ESR). The photocatalytic degradation of NO under solar light using 7% MgO/Bi2S3-BiOCl reached an efficiency of 74.6%, which was better than that obtained using pure Bi2S3 (42.8%) and MgO (11.2%). The reusability test showed that the 7% MgO/Bi2S3-BiOCl material was maintained stability in the photodegradation of NO even after five cycles.The trapping test showed that the holes (h + ) and hydroxyl ( • OH -) were the main active factors in the photodegradation process. The findings of this study confirmed that MgCl2.6H2O is a suitable precursor leading to improvements in the performance of Bi2S3 for the purpose of promoting a new composite that can be used in the photodegradation of NO and could be a candidate for practical applications.

Plasmonic Bi-Modified Bi2Sn2O7 Nanosheets for Efficient Photocatalytic NO Removal

“…The active species is an important factor for exploring the photocatalytic reaction process and its efficiency. In order to inspect the main active species in the photodegradation process, benzoquinone (BQ), ethylenediaminetetraacetic acid disodium (EDTA-2Na), AgNO 3 , and isopropanol (IPA) were selected as the scavengers of •O 2 − , h + , e − , and •OH for the trapping experiment, using B-BSO-300 as a photocatalyst [35]. As shown in Figure 4b, in the presence of BQ, EDTA-2Na, and AgNO 3 , the photocatalytic NO removal efficiency of B-BSO-300 was mostly reduced, confirming that •O 2 − , h + , e − radicals were the first active species to cause NO oxidation.…”

Photodegradation of Methylene Blue Using Carbon-Doped ZnSn(OH)6 Composite Coated on Membrane

“…Various technologies and procedures for environmental remediation have been established in recent decades for dye removal, including adsorption and photocatalysis [6]. Te photocatalytic method proved the efcient result in reducing the synthetic dyes in wastewater due to its simple application in the degradation of dyes processes [7] because photocatalyst applies light energy with the potential level to provide energy for the chemical reaction [8][9][10]. Te catalyst, Zinc-tin bimetal hydroxide, and oxide (ZnSn(OH) 6 , ZnSnO 4 , Zn 2 SnO 3 ), as a class of complex metal oxide was widely studied as a fre retardant [11,12], lithium-ion battery material [13], catalysts owing to their environmentallyfriendly, nontoxic, safe and high-efective fame and smoke-retardant properties, and lithium-ion storage properties [14].…”

Study of the Potential of La/Bi2S3 Catalyst for Photodegradation of Acid Yellow 42 Dye under Visible Light

“…Importantly, photocatalysis exhibits a successful way of treating industrial effluent [9]. The photocatalyst is rapidly expanding and is significantly efficacious due to the number of benefits, including environmental protection and total elimination of pollution [10]. The photocatalytic process promotes the oxidation and removal of most organic compounds, potentially allowing the complete elimination of organic contaminants [11].…”