Understanding the origin of synergistic catalytic activities for ZnO based sonophotocatalytic degradation of methyl orange

Yang, Renpeng; Wu, Zhansheng; Yang, Yan; Li, Yunfeng; Zhang, Luohong; Yu, Bing

doi:10.1016/j.jtice.2021.01.028

Cited by 28 publications

(7 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After 180 min of reaction, the BET specific surface area improved from 47.3 to 109.7 m 2 /g, and the average pore diameter increased from 20.1 to 27.7 nm, suggesting that the deaggregation of nanoparticles by ultrasound results in an enhancement in surface area. The same phenomenon was observed by Yang et al when three different morphologies of ZnO nanoparticles were synthesized and employed for sonophotocatalytic degradation of methyl orange. Surface areas of rod-like ZnO (ZnO-R) with 2.617 m 2 /g, flower-like ZnO (ZnO-F) with 14.98 m 2 /g, and sheet-like ZnO (ZnO-F) with 47.46 m 2 /g increased after the treatment.…”

Section: Sonophotocatalysis Mechanismssupporting

confidence: 79%

“…Sheet-like and flower-like morphologies usually have higher sonophotocatalytic activity, such as for the case of ZnO nanocatalysts, when compared to rod-like ZnO in the degradation of methyl orange. 46 Furthermore, desert rose morphology of ZnO with 50 nm nanosheet petals outperformed other ZnO morphologies, such as nanospheres, nanowires, and microwires in the RhB sonophotocatalytic removal. 58 For the degradation of MB, ZnS/ZnO nanotubes showed greater degradation rate than their nanorods counterpait.…”

Section: ■ Conclusion and Perspectivesmentioning

confidence: 95%

See 1 more Smart Citation

Sonophotocatalysis with Photoactive Nanomaterials for Wastewater Treatment and Bacteria Disinfection

et al. 2023

View full text Add to dashboard Cite

Sonophotocatalysis is described as a combination of two individual processes of photocatalysis and sonocatalysis. It has proven to be highly promising in degrading dissolved contaminants in wastewaters as well as bacteria disinfection applications. It eliminates some of the main disadvantages observed in each individual technique such as high costs, sluggish activity, and prolonged reaction times. The review has accomplished a critical analysis of sonophotocatalytic reaction mechanisms and the effect of the nanostructured catalyst and process modification techniques on the sonophotocatalytic performance. The synergistic effect between the mentioned processes, reactor design, and the electrical energy consumption has been discussed due to their importance when implementing this novel technology in practical applications, such as real industrial or municipal wastewater treatment plants. The utilization of sonophotocatalysis in disinfection and inactivation of bacteria has also been reviewed. In addition, we further suggest improvements to promote this technology from the lab-scale to large-scale applications. We hope this up-to-date review will advance future research in this field and push this technology toward widespread adoption and commercialization.

show abstract

Section: Sonophotocatalysis Mechanismssupporting

confidence: 79%

Section: ■ Conclusion and Perspectivesmentioning

confidence: 95%

Sonophotocatalysis with Photoactive Nanomaterials for Wastewater Treatment and Bacteria Disinfection

et al. 2023

View full text Add to dashboard Cite

show abstract

“… NiAl LDH Catalytic ozonation Methyl orange [pollutant] = 500 mg L −1 , [catalyst] = 1 g L −1 , ozone flow rate = 109 mg h −1 . ∼85 [36] ZnO Sonophotocatalysis Methyl orange [pollutant] = 50 mg L −1 , [catalyst] = 0.1 g L −1 , light source = 300 W, ultrasonic power = 200 W. ∼42 [37] ZnCr LDH Photocatalysis Rhodamine B, Rhodamine 6G, 4-chloro 2-nitro, phenol [pollutant] = 100 mg L −1 , [catalyst] = 1 g L −1 , light source = visible light. ∼57 ∼62 ∼30 [38] WS 2 Sonocatalysis Methylene blue [pollutant] = 10 mg L −1 , [catalyst] = 1 g L −1 , ultrasonic power = 250 W. ∼85 [39] FeAl LDH/ Hydrochar Photocatalysis Diethyl phthalate [pollutant] = 20 mg L −1 , [catalyst] = 1 g L −1 , light source = 500 W Xenon lamp.…”

Section: Resultsmentioning

confidence: 99%

Zinc-chromium layered double hydroxides anchored on carbon nanotube and biochar for ultrasound-assisted photocatalysis of rifampicin

Rad

Khataee

Rad

et al. 2022

Ultrasonics Sonochemistry

View full text Add to dashboard Cite

show abstract

“…Meanwhile, ZnO sonophotocatalysis synergistically accelerated the degradation of chrome intra orange G dye (30 kHz + 365 nm) [ 26 ]. Recent studies supported the existence of synergy in the ZnO-based sonophotocatalytic degradation of sulfamethoxazole (24 kHz + UVA LEDs) [ 27 ], rhodamine B (40/59 kHz + visible light) [ 28 ] and methyl orange dyes (40 kHz + Xe lamp) [ 29 ]. It should be emphasized that the above-cited studies dealt with synthesized ZnO-based composites.…”

Section: Resultsmentioning

confidence: 99%

Characteristics and Sonophotocatalytic Activity of Natural Sphalerite under Ultrasonic (1.7 MHz) and UVA LED (365 nm) Irradiation

et al. 2022

View full text Add to dashboard Cite

Naturally occurring sono- and photoactive minerals, which are abundant on Earth, represent an attractive alternative to the synthesized sonophotocatalysts as cost-effective materials for water and wastewater treatment. This study focuses on characterizing and evaluating the sonophotocatalytic activity of natural sphalerite (NatS) from Dovatka deposit (Siberia) under high-frequency ultrasonic (US, 1.7 MHz) and ultraviolet light-emitting diodes (UVA LED, 365 nm) irradiation towards degradation of 4-chlorophenol as a model organic pollutant. Since raw natural sphalerite did not exhibit a measurable photocatalytic activity, it was calcined at 500, 900 and 1200 °C. The natural sphalerite after calcination at 900 °C (NatS*) was found to be the most effective for sonophotocatalytic degradation of 4-chlorophenol, attaining the highest efficiency (55%, 1 h exposure) in the following row: UV < US ≈ UV/US ≈ US/NatS* < UV/NatS* < UV/US/NatS*. Addition of 1 mM H2O2 increased the removal to 74% by UV/US/NatS*/H2O2 process. An additive effect between UV/NatS* and US/NatS* processes was observed in the sonophotocatalytic system as well as in the H2O2-assisted system. We assume that the sonophotocatalytic hybrid process, which is based on the simultaneous use of high-frequency ultrasound, UVA light, calcined natural sphalerite and H2O2, could provide a basis of an environmentally safe and cost-effective method of elimination of organic pollutants from aqueous media.

show abstract

Understanding the origin of synergistic catalytic activities for ZnO based sonophotocatalytic degradation of methyl orange

Cited by 28 publications

References 37 publications

Sonophotocatalysis with Photoactive Nanomaterials for Wastewater Treatment and Bacteria Disinfection

Sonophotocatalysis with Photoactive Nanomaterials for Wastewater Treatment and Bacteria Disinfection

Zinc-chromium layered double hydroxides anchored on carbon nanotube and biochar for ultrasound-assisted photocatalysis of rifampicin

Characteristics and Sonophotocatalytic Activity of Natural Sphalerite under Ultrasonic (1.7 MHz) and UVA LED (365 nm) Irradiation

Contact Info

Product

Resources

About