Persulfate enhanced photocatalytic degradation of bisphenol A by g-C3N4 nanosheets under visible light irradiation

Liu, Bochuan; Qiao, Meng; Wang, Yanbin; Lijuan, Wang; Gong, Yan; Guo, Tao; Zhao, Xu

doi:10.1016/j.chemosphere.2017.08.169

Cited by 136 publications

(37 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The energy band structure of the 0.9P-CNT sample was studied using the Mott–Schottky (M–S) plot to ensure the band edge potential and semiconductor nature. As shown in Figure 10 , the M–S plot of the 0.9P-CNT sample exhibited a positive slope, indicating a typical n-type semiconductor [ 55 ]. In addition, the flat band (fb) potential of the 0.9P-CNT sample was estimated to be −1.35 V vs. Ag/AgCl.…”

Section: Resultsmentioning

confidence: 99%

One-Dimensional P-Doped Graphitic Carbon Nitride Tube: Facile Synthesis, Effect of Doping Concentration, and Enhanced Mechanism for Photocatalytic Hydrogen Evolution

Jia

Wei

et al. 2022

Nanomaterials

View full text Add to dashboard Cite

P-doped graphitic carbon nitride tubes (P-CNTS) with different P concentrations were successfully fabricated via a pre-hydrothermal in combination with a calcination process under a nitrogen atmosphere. The as-prepared samples exhibited excellent photocatalytic performance with a hydrogen production rate (HPR) of 2749.3 μmol g−1 h−1, which was 17.5 and 6.6 times higher than that of the bulk graphitic carbon nitride (CNB) and graphitic carbon nitride tube (CNT). The structural and textural properties of the P-CNT samples were well-investigated via a series of characterization methods. Compared with the bulk g-C3N4, the tubular structure of the doped samples was provided with a larger specific surface area (SSA) and a relatively rough interior. Besides the above, surface defects were formed due to the doping, which could act as more active sites for the hydrogen production reaction. In addition, the introduction of the P element could effectively adjust the band-gap, strengthen the harvest of visible-light, and boost the effective separation of photogenerated charges. More interestingly, these findings can open up a novel prospect for the enhancement of the photocatalytic performance of the modified g-C3N4.

show abstract

Section: Resultsmentioning

confidence: 99%

One-Dimensional P-Doped Graphitic Carbon Nitride Tube: Facile Synthesis, Effect of Doping Concentration, and Enhanced Mechanism for Photocatalytic Hydrogen Evolution

Jia

Wei

et al. 2022

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…That's since an increase of catalyst dose provided more activation sites for PDS (Tao et al 2015). However, there was only a slight increase of MO degradation rate when the g-C 3 N 4 dose increased to be 1.5 g/L due to the deteriorative light transmittance caused by the relatively high concentrations of catalyst (Liu et al 2017). As a result, 1 g/L of catalyst was chosen as the optimal dose in this study.…”

Section: Effects Of Catalytic Doses and Pds Concentrationsmentioning

confidence: 98%

“…Although both peroxymonosulphate (PMS, generally supplied as 2KHSO 5 •KHSO 4 •K 2 SO 4 ) and peroxodisulphate (PDS, generally supplied as Na 2 S 2 O8) acted as strong oxidants, PDS was almost exclusively used as a sulfate radical precursor in practical applications due to its lower costs and higher stability (Hasija et al 2021;Ike et al 2018;Tsitonaki et al 2010). Previously, although there were many studies related to PS-AOPs coupled with g-C 3 N 4 for the photocatalytic degradation of organic pollutants, most of them focused on g-C 3 N 4 photocatalysis coupled with PMS system under visible light irradiation only (Jiang et al 2020(Jiang et al , 2017Yin et al 2020;Liu et al 2017). There were few studies related to g-C 3 N 4 /PDS under sunlight (Song et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

gCN-P: a coupled g-C3N4/persulfate system for photocatalytic degradation of organic pollutants under simulated sunlight

Shen

Zhang

Zhao

et al. 2021

Environ Sci Pollut Res

View full text Add to dashboard Cite

A coupled g-C 3 N 4 /PDS system, named gCN-P, has been put forward to degrade refractory organic pollutants under simulated sunlight which integrates photocatalysis and PS-AOPs (advanced oxidation of persulfate based on sulfate radicals). The coupled g-C 3 N 4 and PDS showed superior synergistic effect for MO degradation under simulated sunlight. Results showed that almost all MO was removed in the gCN-P system after irradiation for 80 min under simulated sunlight. The degradation rate of gCN-P system was improved by 12.6 and 4.9 times compared to single PDS and g-C 3 N 4 systems, respectively. And only by adding 0.01 g of persulfate into the gCN-P system. The results of quenching experiments and EPR showed that O 2 − , 1 O 2 and h + were main active species for the degradation of MO in the gCN-P system under simulated sunlight. Application of the gCN-P system in tap water samples demonstrated its excellent performance in real-world water environment, and the gCN-P system was employed for removing other new contaminants such as bisphenol A, ciprofloxacin, and paracetamol. The results demonstrated the gCN-P system can effectively remove organic pollutants under sunlight in practices.

show abstract

“…6d (Qiao et al, 2020). Table S2 describes PMS/PDS activation using unmodified g-C 3 N 4 photocatalyst (Dou et al, 2020;Liu et al, 2017;Song et al, 2020;Xu et al, 2020;Tao et al, 2015;Jiang et al, 2017;Qiao et al, 2020).…”

Section: Pms/pds Photoactivation Using Graphitic Carbon Nitride (G-c 3 N 4 )mentioning

confidence: 99%

Advanced activation of persulfate by polymeric g-C3N4 based photocatalysts for environmental remediation: A review

Hasija

Nguyen

Kumar

et al. 2021

Journal of Hazardous Materials

346

View full text Add to dashboard Cite

Photocatalytic materials for photocatalysis is recently proposed as a promising strategy to address environmental remediation. Metal-free graphitic carbon nitride (g-C 3 N 4 ), is an emerging photocatalyst in sulfate radical based advanced oxidation processes. The solar-driven electronic excitations in g-C 3 N 4 are capable of peroxo (O-O) bond dissociation in peroxymonosulfate/peroxydisulfate (PMS/PDS) and oxidants to generate reactive free radicals, namely SO 4•− and OH • in addition to O 2 •− radical. The synergistic mechanism of g-C 3 N 4 mediated PMS/ PDS photocatalytic activation, could ensure the generation of OH • radicals to overcome the low reductive potential of g-C 3 N 4 and fastens the degradation reaction rate. This article reviews recent work on heterojunction formation (type-II heterojunction and direct Z-scheme) to achieve the bandgap for extended visible light absorption and improved charge carrier separation for efficient photocatalytic efficiency. Focus is placed on the fundamental mechanistic routes followed for PMS/PDS photocatalytic activation over g-C 3 N 4 -based photocatalysts. A particular emphasis is given to the factors influencing the PMS/PDS photocatalytic activation mechanism and the contribution of SO 4 •− and OH • radicals that are not thoroughly investigated and require further studies. Concluding perspectives on the challenges and opportunities to design highly efficient persulfateactivated g-C 3 N 4 based photocatalysts toward environmental remediation are also intensively highlighted.

show abstract

Persulfate enhanced photocatalytic degradation of bisphenol A by g-C3N4 nanosheets under visible light irradiation

Cited by 136 publications

References 42 publications

One-Dimensional P-Doped Graphitic Carbon Nitride Tube: Facile Synthesis, Effect of Doping Concentration, and Enhanced Mechanism for Photocatalytic Hydrogen Evolution

One-Dimensional P-Doped Graphitic Carbon Nitride Tube: Facile Synthesis, Effect of Doping Concentration, and Enhanced Mechanism for Photocatalytic Hydrogen Evolution

gCN-P: a coupled g-C3N4/persulfate system for photocatalytic degradation of organic pollutants under simulated sunlight

Advanced activation of persulfate by polymeric g-C3N4 based photocatalysts for environmental remediation: A review

Contact Info

Product

Resources

About