Nitrogen and phosphorus co-doped carbocatalyst for efficient organic pollutant removal through persulfate-based advanced oxidation processes

Ouadrhiri, Faiçal El; Althomali, Raed H.; Adachi, Abderrazzak; Saleh, Ebraheem Abdu Musad; Husain, Kakul; Lhassani, Abdelhadi; Hassan, Ismail; Moharam, M. M.; Kassem, Asmaa F.; Chaouch, Mehdi; Oturan, Mehmet A.; Lahkimi, Amal

doi:10.1016/j.jscs.2023.101648

Cited by 11 publications

(3 citation statements)

References 104 publications

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“…, potassium iodide and potassium dichromate) can block the electron transfer between the surface-confined active complex and organics and thus substantially depress the catalytic oxidation efficiency. 100 Seventh, adding a reagent ( e.g. , NaClO 4 ) that is capable of inhibiting the surface interactions between PMS/PDS and carbocatalyst but not able to disturb the radical pathway is an effective way to consolidate the electron-transfer non-radical pathway.…”

Section: Single-heteroatom Doping Of Carbon Materialsmentioning

confidence: 99%

“…Nevertheless, once the P heteroatom is doped into a carbon matrix, the sp 2 carbon structure can be largely distorted, inducing the formation of structure defects that might be beneficial for the adsorption and catalytic reactions with PDS/PMS. 100 Considering that single P doping might not be capable of significantly breaking the chemical inertness of the carbon matrix due to the limited doping content, co-doping with P and N is promising for obtaining highly active carbocatalysts in PMS/PDS activation. More importantly, the synergistic impact of N and P on the adjacent C can maximize the local charge density to boost the catalytic activity for PMS/PDS activation toward pollutant degradation.…”

Section: Dual-heteroatom Doping Of Carbon Materialsmentioning

confidence: 99%

“…For example, N, P-dual-doped biochar catalyst was reported to be superior to single N- and P-doped biochar and undoped biochar counterparts for PMS activation toward Rhodamine B degradation, with the N-6, N-5, and P–O–C and O–P–C bonds presumed as the active sites. 100 Interestingly, despite investigating the N, P-dual-doped core/shell porous carbon as the PMS catalyst for phenol degradation (see the synthetic diagram in Fig. 15a), N-6 and CO were reported as the dominant catalytic sites while doped P played an assistant role in inducing the formation of several active sites and further regulating the surface charge density for enhanced electron transfer (see the metal-free carbocatalysis mechanism in Fig.…”

Section: Dual-heteroatom Doping Of Carbon Materialsmentioning

confidence: 99%

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Understanding the active sites and associated reaction pathways of metal-free carbocatalysts in persulfate activation and pollutant degradation

Hu,

Chen,

Liang

et al. 2024

Environ. Sci.: Nano

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Section: Single-heteroatom Doping Of Carbon Materialsmentioning

confidence: 99%

Section: Dual-heteroatom Doping Of Carbon Materialsmentioning

confidence: 99%

Section: Dual-heteroatom Doping Of Carbon Materialsmentioning

confidence: 99%

See 1 more Smart Citation

Understanding the active sites and associated reaction pathways of metal-free carbocatalysts in persulfate activation and pollutant degradation

Hu,

Chen,

Liang

et al. 2024

Environ. Sci.: Nano

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Stable Sub‐2‐nm Fe₃O₄ Particles Confined in P, N Co‐Doped Carbon Derived from the Assembly of DPPF with PCN‐222: A Promising Transfer Hydrogenation Catalyst

Liu,

Wang,

Chen

et al. 2024

ChemistrySelect

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The nanoconfinement approach for constructing ultra‐small nanoparticles has been effectively utilized in the development of non‐precious metal catalysts. Herein, the catalyst precursor was prepared by host‐guest assembly method, using PCN‐222 as the host and 1,1′‐bis(diphenylphosphino) ferrocene (DPPF) as the guest. After calcination, the sub‐2 nm iron oxide nanoparticles within a phosphorus‐nitrogen co‐doped carbon matrix (Fe3O4@P/N‐CDCM) was obtained. Benefiting from the nanoconfinement effect, the sub‐2 nm Fe3O4 nanoparticles were uniformly dispersed on the P/N‐CDCM matrix. As a representative application, Fe3O4@P/N‐CDCM‐600 showed remarkable catalytic activity in the reduction of various nitroaromatic compounds. Under ambient conditions, the efficient reduction of nitro compounds in aqueous solution led to excellent conversion rates (96–99 %) and selectivity (99 %) within 45 minutes. Additionally, the catalyst maintained high efficiency over 5 cycles without experiencing a noticeable decrease in activity. This work provides an innovative and cost‐effective strategy for fabricating highly dispersed non‐precious metal nanoparticles.

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Iron-doped catalyst synthesis in heterogeneous Fenton like process for dye degradation and removal: optimization using response surface methodology

Adachi,

El Ouadrhiri,

Saleh

et al. 2023

SN Appl. Sci.

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Iron-doped hydrochar can effectively remove the methyl orange dye (MO). In this study, iron-doped hydrochar (5% Fe@BC) was successfully synthesized through a two-step hydrothermal carbonization (HTC) process, using FeSO4.7H2O and sawdust. It was subsequently employed for MO removal. The characterization of the synthesized Fenton-like catalyst (5% Fe@BC) was conducted, using scanning electron microscopy, Fourier-transform infrared and X-ray diffraction techniques to confirm the presence of iron species. The effects of different operating parameters such as catalyst mass, H2O2 concentration, solution pH, organic pollutant concentration, and reaction temperature have been examined. The Box-Behnken design combined with three factors: catalyst mass X1, temperature X2, organic pollutant concentration X3. The response surface methodology coupled with Box-Behnken Design was used to optimize the key variables and response. With this approach, an exhaustive assessment of the variables influencing the optimization process was performed. A significant quadratic model was generated through analysis of variance with a P-value of 0.0001 and an R2 of 0.99. This confirms a strong relationship between the variables and the response, as well as a high level of model predictability. The optimum conditions were achieved with a catalyst mass of 0.5 g/L, a temperature of 35.5 °C, and an MO concentration of 50 mg/L. The result indicates that 93% of the discoloration efficiency was achieved within 60 min under the optimal conditions. Iron doping in the (5% Fe@BC) plays a crucial role in the degradation and removal of MO. Therefore, the 5% Fe@BC prepared from sawdust and iron salts (FeSO4·7H2O) through a two-step HTC process is an inexpensive and effective catalyst for removing organic pollutant from aqueous solutions, using heterogeneous Fenton-like process.

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Nitrogen and phosphorus co-doped carbocatalyst for efficient organic pollutant removal through persulfate-based advanced oxidation processes

Cited by 11 publications

References 104 publications

Understanding the active sites and associated reaction pathways of metal-free carbocatalysts in persulfate activation and pollutant degradation

Understanding the active sites and associated reaction pathways of metal-free carbocatalysts in persulfate activation and pollutant degradation

Stable Sub‐2‐nm Fe₃O₄ Particles Confined in P, N Co‐Doped Carbon Derived from the Assembly of DPPF with PCN‐222: A Promising Transfer Hydrogenation Catalyst

Iron-doped catalyst synthesis in heterogeneous Fenton like process for dye degradation and removal: optimization using response surface methodology

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Nitrogen and phosphorus co-doped carbocatalyst for efficient organic pollutant removal through persulfate-based advanced oxidation processes

Cited by 11 publications

References 104 publications

Understanding the active sites and associated reaction pathways of metal-free carbocatalysts in persulfate activation and pollutant degradation

Understanding the active sites and associated reaction pathways of metal-free carbocatalysts in persulfate activation and pollutant degradation

Stable Sub‐2‐nm Fe3O4 Particles Confined in P, N Co‐Doped Carbon Derived from the Assembly of DPPF with PCN‐222: A Promising Transfer Hydrogenation Catalyst

Iron-doped catalyst synthesis in heterogeneous Fenton like process for dye degradation and removal: optimization using response surface methodology

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Stable Sub‐2‐nm Fe₃O₄ Particles Confined in P, N Co‐Doped Carbon Derived from the Assembly of DPPF with PCN‐222: A Promising Transfer Hydrogenation Catalyst