Evaluation catalytic performance of Ag/TiO2 in dielectric barrier discharge plasma

Lin, Qiuhong; Peng, Haiyang; Xie, Wei; Duan, Lijuan; Shao, Cairu; Wang, Dongxing; Rao, Shuai; Cao, Hongmei

doi:10.1016/j.vacuum.2021.110844

Cited by 10 publications

(3 citation statements)

References 45 publications

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“…In addition, it increases light scattering to capture a greater portion of light for coupled TiO 2 semiconductors 11 . Recently, Ag/TiO 2 composite was reported to have a high separation rate of electron and hole, which enhanced the degradation of phenol when combined with CAP 12 .…”

Section: Introductionmentioning

confidence: 99%

Removal of chemical and microbial water pollutants by cold plasma combined with Ag/TiO2-rGO nanoparticles

Abdel-Wahed

Hefny

Abd-Elmaksoud

et al. 2022

Sci Rep

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This study aimed to investigate the synergistic effect of the cold atmospheric plasma (CAP) and heterogeneous photocatalytic processes in an aqueous solution to enhance water purification efficacy and reduce the energy cost required by CAP. 0.1% Ag/TiO2-reduced graphene oxide (rGO) nanoparticles (NPs) photo-composite were prepared and fully characterized. Data showed that Ag nanoparticles and the rGO play an important role in increasing the efficiency of the whole treatment process and the photo-composite (0.1% Ag/TiO2-1% rGO at 400 °C) revealed the highest phenol removal rate with excellent reusability. Also, complete inactivation (~ 5log10 reduction) of both E. coli and S. aureus by NPs was observed without CAP exposure, whereas a minimal effect (0.1–0.5 log10) on viruses (Adenovirus (AdV), rotavirus, and ɸX174) was observed after 10 min incubation. Interestingly, the photocatalytic virus inactivation test was promising, as it resulted in > 4.7log10 reduction of AdV at 2 min treatment, whereas < 1log10 could be reduced using only CAP at the same treatment time. Accordingly, we believe that this work could provide new insights into how the synergy between CAP and 0.1% Ag/TiO2-1% rGO photo-composite in aqueous media imposes a great potential for environmental applications, such as water purification and microbial inactivation.

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Section: Introductionmentioning

confidence: 99%

Removal of chemical and microbial water pollutants by cold plasma combined with Ag/TiO2-rGO nanoparticles

Abdel-Wahed

Hefny

Abd-Elmaksoud

et al. 2022

Sci Rep

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“…As a result, DBD has a wide range of applications in various elds, including material modi cation, wastewater treatment, medical treatments, and industrial production [1][2][3] . Studies have demonstrated that the synthesis of ozone in the generator can be effectively enhanced by coupling DBD with catalysts [4,5] .One of the main methods of coupling DBD with catalysts is by lling the discharge region of the DBD generator with spherical or irregularly shaped dielectric particles, forming a packed-bed dielectric barrier discharge (PB-DBD) [6][7][8] . Hafeez et al [9]investigated a novel corona PB-DBD generator by lling the discharge region with dielectric glass beads and compared its ozone synthesis performance with an empty-bed generator.…”

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confidence: 99%

mentioning

confidence: 99%

Evaluating Discharge Performance and Catalytic Properties of Nanoscale Catalyst Dielectric Barrier Discharge System

Shi,

Xie,

Cai

et al. 2023

Plasma Chem Plasma Process

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Dielectric barrier discharge (DBD), a non-thermal plasma(NTP)technology, has a wide range of environmental applications. In this study, TiO 2 , SiO 2 , and Al 2 O 3 were coated on the surface of a quartz dielectric using a dip-coating method. The catalyst coating coatings effectively improved the local discharge intensity, thus enhancing the generation of reactive species. After discharge by the DBD system, the O atom in the middle of TiO 2 crystal is replaced by N atom doping, and the Al = O and Al OH groups on the surface of Al 2 O 3 increase. All Catalyst coating surfaces contained a small number of hydroxyl groups. TiO 2 and Al 2 O 3 surfaces had fewer oxygen vacancies. thus making O 3 synthesis dominant at the gas-solid interface.1 Introduction Dielectric barrier discharge (DBD) is a non-equilibrium gas discharge generated by placing a dielectric barrier between two electrodes. The dielectric material can be coated on the electrode surfaces or suspended within the discharge space. DBD is a reliable and cost-effective method for generating nonthermal plasma (NTP). It can be operated over a wide range of voltage frequencies (from 50 Hz to 1 MHz, alternating current) and gas pressures (from 10 4 Pa to 10 6 Pa). As a result, DBD has a wide range of applications in various elds, including material modi cation, wastewater treatment, medical treatments, and industrial production [1][2][3] . Studies have demonstrated that the synthesis of ozone in the generator can be effectively enhanced by coupling DBD with catalysts [4,5] .One of the main methods of coupling DBD with catalysts is by lling the discharge region of the DBD generator with spherical or irregularly shaped dielectric particles, forming a packed-bed dielectric barrier discharge (PB-DBD) [6][7][8] . Hafeez et al. [9]investigated a novel corona PB-DBD generator by lling the discharge region with dielectric glass beads and compared its ozone synthesis performance with an empty-bed generator. The results showed that the packed-bed plasma generator increases ozone production by approximately 24% under optimized conditions compared with the empty-bed generator. J.Wang et al. [10] lled the generator with metal oxide powders as catalysts and study the effects of catalyst powders on O 3 synthesis and decomposition.. The results showed that FeO, CuO, and ZnO can effectively promote O 3 synthesis whereas MnO 2 and Fe 2 O 3 promoted ozone decomposition rather than synthesis. Meng Li et al. [11] integrated ZnO powder into a hybrid discharge (HD) reactor to investigate the effect of ZnO powder surface reaction on ozone synthesis. The results show that the use of ZnO powder for the optimal conditions with a discharge power of 0.4-3.3 W leads to an average increase of 28% and 26% in O 3 concentration and HD yield, respectively, and the enhanced O 3 synthesis in HD-ZnO is mainly attributed to the strong surface reaction catalyzed by the coating in the O2 plasma. S. Said et al. [12] lled alumina particles into the generator to study the reaction mechanism of ozone synthes...

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Simultaneous removal of Cr(Ⅵ) and tetracycline from wastewater by dielectric barrier discharge plasma coupled with TiO2/rGO/Cu2O composites: Performance and mechanism

Peng,

Duan,

Xie

et al. 2024

Chemosphere

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Evaluation catalytic performance of Ag/TiO2 in dielectric barrier discharge plasma

Cited by 10 publications

References 45 publications

Removal of chemical and microbial water pollutants by cold plasma combined with Ag/TiO2-rGO nanoparticles

Removal of chemical and microbial water pollutants by cold plasma combined with Ag/TiO2-rGO nanoparticles

Evaluating Discharge Performance and Catalytic Properties of Nanoscale Catalyst Dielectric Barrier Discharge System

Simultaneous removal of Cr(Ⅵ) and tetracycline from wastewater by dielectric barrier discharge plasma coupled with TiO2/rGO/Cu2O composites: Performance and mechanism

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