In-situ formed N-doped bamboo-like carbon nanotubes encapsulated with Fe nanoparticles supported by biochar as highly efficient catalyst for activation of persulfate (PS) toward degradation of organic pollutants

Heteroatom-Doped Hierarchically Porous Biochar for Supercapacitor Application and Phenol Pollutant Remediation

“…When increasing the concentration of PDS from 0.1 to 0.5 mM, complete removal was achieved with 10 min of reaction, and the kinetic constant increased from 0.134 min −1 to 0.683 min −1 . However, further increase of PDS dosage (1.0 mM) resulted in deteriorated degradation efficiency ( k = 0.457 min −1 ), which could be ascribed to the self-quenching effect caused by the presence of excessive PDS in the system [ 53 ]. It is noteworthy to mention that, compared with the wildly adopted carbon-based catalyst dosages of 0.5–1.0 g/L and PDS concentration of 4–6 mM in previous reports [ 36 , 42 , 53 ], the lower catalyst (0.1 g/L) and PDS (0.5 mM) amounts needed in this work undoubtedly signify better catalytic performance and lower economic costs.…”

“…However, further increase of PDS dosage (1.0 mM) resulted in deteriorated degradation efficiency ( k = 0.457 min −1 ), which could be ascribed to the self-quenching effect caused by the presence of excessive PDS in the system [ 53 ]. It is noteworthy to mention that, compared with the wildly adopted carbon-based catalyst dosages of 0.5–1.0 g/L and PDS concentration of 4–6 mM in previous reports [ 36 , 42 , 53 ], the lower catalyst (0.1 g/L) and PDS (0.5 mM) amounts needed in this work undoubtedly signify better catalytic performance and lower economic costs. To explore the effect of initial pH on phenol removal, degradation experiments were conducted at a pH range of 3–11.…”

Nitrogen-doped biochars as adsorbents for mitigation of heavy metals and organics from water: a review

“…Biochars derived from nitrogen-rich biomass such as municipal and animal wastes, algae, or weeds are likely to have a high N content in their structure due to recalcitrant protein structures. Biochars from these biomasses contain heterocyclic N moieties, which could change the delocalized π-bonded and p electronic environment of the aromatic carbon matrix by regulating the electron charge density (Zhu et al 2020a). The characteristics of N-doped biochars produced from nitrogen-rich biomass are summarized in Table 1.…”

Peroxymonosulfate activation by tea residue biochar loaded with Fe3O4 for the degradation of tetracycline hydrochloride: performance and reaction mechanism

“…18 However, due to the small particle size and high surface energy, nano metal oxides, especially magnetic particles such as Fe 3 O 4 , are prone to agglomeration and ion leaching to cause secondary pollution problems, limiting their application in practice. 17 The preparation of nanometer iron oxide composite materials using porous materials as the carrier, 18 can improve the dispersibility and reactivity of nanometer iron oxides and can utilize the synergistic effect of iron oxide and carrier materials to improve the removal effect of pollutants. 19,20 Among them, carbon materials have shown broad application prospects in the eld of catalysis by virtue of their unique nanostructure, excellent conductivity, chemical stability and adsorption characteristics.…”

“… 17 Transition metals and their oxides have better activation efficiency and can be conducted with simple operation under normal temperature and pressure. 18 However, due to the small particle size and high surface energy, nano metal oxides, especially magnetic particles such as Fe 3 O 4 , are prone to agglomeration and ion leaching to cause secondary pollution problems, limiting their application in practice. 17 The preparation of nanometer iron oxide composite materials using porous materials as the carrier, 18 can improve the dispersibility and reactivity of nanometer iron oxides and can utilize the synergistic effect of iron oxide and carrier materials to improve the removal effect of pollutants.…”