Fenton activity on RhB degradation of magnetic g-C3N4/diatomite/Fe3O4 composites

Xiong, Chunyu; Ren, Qifang; Liu, Xinyu; Jin, Zhen; Ding, Yi; Zhu, Haitao; Li, Jinpeng; Chen, Ranran

doi:10.1016/j.apsusc.2020.148844

Cited by 52 publications

(11 citation statements)

References 39 publications

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“…The FTIR peak at 814 cm −1 provides evidence of the existence of g-C 3 N 4 with tri-s-triazine rings. The absorption peaks between 1230 and 1650 cm −1 can be attributed to C–N and C=N stretching vibrations [ 29 ].…”

Section: Resultsmentioning

confidence: 99%

Simultaneous Analysis of 53 Pesticides in Safflower (Carthamus tinctorius L.) by Using LC–MS/MS Coupled with a Modified QuEChERS Technique

Song¹,

Peng

Liu³

et al. 2023

Toxics

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Objective: An optimized quick, easy, cheap, effective, rugged, and safe (QuEChERS) technique was investigated and compared with the conventional QuEChERS technique for the simultaneous analysis of fifty-three pesticide residues in safflower using ultra-high performance liquid chromatography–tandem mass spectrometry (UHPLC–MS/MS). Method: Graphitic carbon nitride (g-C3N4) consisting of a major amount of carbon and nitrogen with a large surface area was used as a QuEChERS adsorbent instead of graphitized carbon black (GCB) for safflower extraction purification. Validation experiments were performed using spiked pesticide samples, and real samples were analyzed. Results: The linearity of the modified QuEChERS technique was evaluated with high coefficients of determination (R-2) being higher than 0.99. The limits of detection were <10 μg/kg. The spiked recoveries ranged from 70.4% to 97.6% with a relative standard deviation of less than 10.0%. The fifty-three pesticides exhibited negligible matrix effects (<20%). Thiamethoxam, acetamiprid, metolachlor, and difenoconazole were detected in real samples using an established method. Conclusion: This work provides a new g-C3N4-based modified QuEChERS technique for multi-pesticide residue analysis in complex food matrices.

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Section: Resultsmentioning

confidence: 99%

Simultaneous Analysis of 53 Pesticides in Safflower (Carthamus tinctorius L.) by Using LC–MS/MS Coupled with a Modified QuEChERS Technique

Song¹,

Peng

Liu³

et al. 2023

Toxics

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“…Figure 1 shows the X-ray diffraction (XRD) figures of the composite catalysts. The diffraction peaks at 21.8 • and 36.5 • belong to diatomite [23,24], and the diffraction peaks at 25.27 • , 37.82 • , 47.8 • , and 54.3 • belong to the (101), (004), (200), and (211) planes of rutile TiO 2 (PDF#21-1276), respectively [25]. The diffraction peaks at 31.8 • , 34.4 • , 36.2 • , 47.5 • , 56.6 • , 62.8 • , and 67.9 • belong to the (100), (002), ( 101), ( 102), ( 110), (103), and (112) planes of hexagonal wurtzite ZnO, respectively.…”

Section: Phase Analysismentioning

confidence: 99%

Synthesis and Photoelectrocatalytic Applications of TiO2/ZnO/Diatomite Composites

Yang

Wang

et al. 2022

Catalysts

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ZnO and TiO2 are semiconductor nanomaterials that are widely used in photocatalysis. However, the relatively high recombination rate and low quantum yield of photogenerated electron–hole pairs limit their practical applications. In this study, a series of TiO2/ZnO/diatomite composites with various compositions were successfully prepared via a two-step precipitation method. They exhibited stronger UV–visible absorption properties and substantially lower fluorescence intensities than those of ZnO and ZnO/diatomite, which was mainly due to the low recombination rate of the photogenerated electron–hole pairs in the composite system. The reaction intermediates of methylene blue were detected by liquid chromatography–mass spectrometry, and the degradation process was determined. The best composite catalyst was used for the degradation of gaseous methylbenzene and gaseous acetone. The gaseous acetone degradation product was determined to be acetaldehyde via gas chromatography–mass spectrometry. The results show that the composite catalyst exhibited a good photocatalytic degradation of both liquid pollutants and harmful volatile gases. When applied to the hydrogen and oxygen evolution reactions, the composite catalyst retained a good photoresponsivity and electrolytic efficiency.

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“…However, in all these cases, the UIO-66 composites tend to agglomerate, reducing their catalytic performance reduced upon repeated use. Carriers such as natural diatomite are also introduced to disperse UIO-66 catalysts to minimize aggregation (Yuan et al, 2020;Safa et al, 2021;Xiong et al, 2021a).…”

Section: Introductionmentioning

confidence: 99%

Efficient degradation of sulfamethoxazole by diatomite-supported hydroxyl-modified UIO-66 photocatalyst

Liu,

Zhang,

et al. 2023

Preprint

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Sulfamethoxazole (SMX) is a widely used antibiotic to treat bacterial infections prevalent among humans and animals. SMX undergoes several transformation pathways in living organisms and external environments. Therefore, the development of efficient remediation methods for treating SMX and its metabolites is needed. We fabricated a photo-Fenton catalyst using UIO-66 (Zr) metal-organic framework (MOF) dispersed in diatomite by a single-step solvothermal method for hydroxylation (HO-UIO-66). The HO-UIO-66-0/DE assisted Fenton process shows SMX degradation at 94.7% efficiency; however, HO-UIO-66 (Zr) is not stable. We improved the stability of the catalyst by introducing a calcination step. The calcination temperature is critical to improving the catalytic efficiency of the composite (for example, designated as HO-UIO-66/DE-300 to denote hydroxylated UIO-66 dispersed in diatomite calcined at 300°C). The degradation of SMX by HO-UIO-66/DE-300 was 93.8% in 120 min with 4 mmol/L H2O2 at pH 3 under visible light radiation. The O1s XPS signatures signify the stability of the catalyst after repeated use for SMX degradation. The electron spin resonance spectral data suggests the role of h+, •OH, •O2-, and 1O2 in SMX degradation routes. The HO-UIO-66/DE-300 assisted Fenton process shows potential in degrading pharmaceutical products present in water and wastewater.

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Fenton activity on RhB degradation of magnetic g-C3N4/diatomite/Fe3O4 composites

Cited by 52 publications

References 39 publications

Simultaneous Analysis of 53 Pesticides in Safflower (Carthamus tinctorius L.) by Using LC–MS/MS Coupled with a Modified QuEChERS Technique

Simultaneous Analysis of 53 Pesticides in Safflower (Carthamus tinctorius L.) by Using LC–MS/MS Coupled with a Modified QuEChERS Technique

Synthesis and Photoelectrocatalytic Applications of TiO2/ZnO/Diatomite Composites

Efficient degradation of sulfamethoxazole by diatomite-supported hydroxyl-modified UIO-66 photocatalyst

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