Adsorption study of p-nitrophenol on a silver(I) triazolate MOF

Boosting Hydrogenation of Graphene Quantum Dot-Modified Photocatalysts: Specific Functionalized Modulation at Active Sites

“…Figure S5a displays the major UV–vis absorption peak of 4-NP in the aqueous solution, which was centered at 317 nm and can be attributed to the molecular state. In addition, a minor characteristic absorption peak was observed at 401 nm, corresponding to a part of the 4-NP molecules (a weak acid at 298 K in aqueous solution) transformed to 4-nitrophenolate ions (4-NP – ) through deprotonation . Based on the UV–vis absorption and diffuse reflection spectra (DRS) results in Figures S5 and S6, the deprotonation processes of 4-NP in the solution (the increase in absorbance at 410 nm compared with that of pure 4-NP) were present among all hybrid systems.…”

“…In addition, a minor characteristic absorption peak was observed at 401 nm, corresponding to a part of the 4-NP molecules (a weak acid at 298 K in aqueous solution) transformed to 4nitrophenolate ions (4-NP − ) through deprotonation. 39 Based on the UV−vis absorption and diffuse reflection spectra (DRS) results in Figures S5 and S6, the deprotonation processes of 4-NP in the solution (the increase in absorbance at 410 nm compared with that of pure 4-NP) were present among all hybrid systems. Moreover, the differentials of the chemical microenvironments on the surfaces of the various catalysts mediated the absorption property and the deprotonation degree of 4-NP molecules in the solution (detailed information and the corresponding discussion have been provided in the Supporting Information).…”

Removal of p-nitrophenol from simulated sewage using MgCo-3D hydrotalcite nanospheres: capability and mechanism

“…The p K a of 4-NP is 7.15, and it is mainly present in the solution as ions (4-NP, pH > 7.15) and molecules (4-NP, pH < 7.15). 49 Zeta potential analysis ( Fig. 4(b) ) showed that the adsorbent surface was always positive.…”

“…[10][11][12] Metal-organic frameworks (MOFs) are coordination polymers with a 3D pore structure, which have high porosity, large specic surface area, high chemical stability and abundant unsaturated coordination sites rendering them effective adsorbents. [13][14][15] Miao et al 16 synthesized a silver(I) 3,5-diphenyltriazolate MOF, AgTz-1, that exhibited a maximum adsorption capacity of 143.5 mg g À1 for 4-NP. Aldawsari et al 17 developed a class of porous adsorbent composite, AC-NH2-MIL-101 (Cr), which adsorbed 4-NP with a capacity of 183 mg g À1 .…”

One‐pot Economic Synthesis to the Functional Copper Mixed‐triazolate MOF Materials Towards an Enhanced Adsorptive Removal of Diclofenac Sodium

“…À is usually considered as one of the mechanisms during adsorption. [19,25] Hence, the concentration of BF 4 À in the solution at equilibrium was tested by ion chromatography. The quantities of tested anions with varying the initial pH value and concentration of DCF are shown in Figure 9a and 9b, respectively.…”