g-C3N4 modified magnetic Fe3O4 adsorbent: Preparation, characterization, and performance of Zn(II), Pb(II) and Cd(II) removal from aqueous solution

A Novel Electrochemical Sensor for Simultaneous Determination of Hydroquinone, Catechol, and Resorcinol Using a Carbon Paste Electrode Modified by Zn‐MOF, Nitrogen‐doped Graphite, and AuNPs

“…In addition, the small peak that appeared around 30–40° (2θ) verified the existence of a trace amount of free ZnO (JCPDS 36–1451) in the Zn‐MOF framework. The characteristic peak of gC 3 N 4 (JCPDS 87–1526) appeared in 2θ=13.1° is corresponding to (001) crystal plane, which is given the credit to in‐plane structural repeating units of tri‐s‐triazine, and another typical crystal characteristic peak of gC 3 N 4 is located at 2θ=27.2° (002), proving that the gC 3 N 4 were successfully synthesized [29]. After the deposition of AuNPs, the characteristic diffraction of Au (JCPDS 80–0019) at 38.2° and 44.3° were detected, indexed to the (111) and (200) planes of AuNPs [30] from XRD pattern of Au‐gC 3 N 4 ‐Zn‐MOF.…”

“…The mixture was washed with DMF and immersed in CHCl 3 in order to become purred. Then the product was filtered and dried under vacuum at 120 °C and the white solid powder stored on a sealed container [28, 29]. Finally, the synthesized matter was characterized by SEM and FT‐IR.…”

Porous carbons prepared from a novel hard wood composite waste for effective adsorption of Pb(ii) and Cd(ii) ions

“…The adsorption experimental data reached were modeled with Langmuir (eqn (6)), Freundlich (eqn (7)), Dubinin–Radushkevich (DR) (eqn (8)) and Redlich–Peterson (eqn (9)) isotherm models 3–5 as expressed below: q e = K F C e 1/ n q e = q s e (− K DR ε 2 ) where K L (L mg −1 ) is the Langmuir equilibrium constant related to the affinity of adsorption sites and q m (mg g −1 ) represents the maximum theoretical monolayer adsorption capacity. K F and n are the Freundlich adsorption constants which are related to the adsorption capacity and intensity, respectively.…”

Porous g-C3N4 modified with phenanthroline diamide for efficient and ultrafast adsorption of palladium from simulated high level liquid waste

“…Increased adsorptive selectivity for Zn( ii ), Pd( ii ), and Cd( ii ) was seen in Fe 3 O 4 -doped g-C 3 N 4 because of the formation of conjugation between Fe 3 O 4 /g-C 3 N 4 and heavy metal ions. 30 Using the synergy of ion exchange, reduction, and complexation, a ternary Fe 3 O 4 /g-C 3 N 4 /carbon composite could efficiently adsorb Cr( vi ). It has an adsorption capability of 50.09 mg g −1 .…”