Chloride intercalated Zn-Al layered double hydroxide nanoparticles: novel photoluminescent colloids

Enhancement of the properties of ZnAl-LDHs for photocatalytic nitrogen reduction reaction by controlling anion intercalation

“…It is obvious that the energy absorbed by Car@ZnAL-LDH under irradiation was released in the form of luminescence at about 350-460 nm due to the rapid recombination of electrons and holes. [48][49][50] After the suberic acid intercalation, the number of trapped electrons increased due to the exposure of more oxygen vacancies on the laminate, resulting in a decrease in the intensity of the fluorescence absorption peak for Sub@ZnAL-LDH. And PMo 9 V 3 , as a photosensitive unit and electron repeater (the O 2 yield of PMo 9 V 3 @ZnAL-LDH was much higher than that of the reduction product, indicating that a large number of photoelectrons were stored in PMo 9 V 3 while the holes were consumed.…”

Photocatalytic degradation of Ponceau 4R by ZnAl‐layered double hydroxide nanostructures obtained with and without polyvinyl alcohol

“…A higher emission wavelength corresponding ZnAl‐LDH is observed because of molecular interaction due to increased surface defects and sufficient exfoliation. [ 34 ] Three peaks of PL emission with deep‐level emission (DLE) appear in nanocomposite spectra. The more intensive one shows the recombination of free excitons and the next one originated the deep‐level defects such as O‐vacancy and Zn‐interstitial, etc.…”

Synthesis of layered double hydroxides: Investigating the impact of stirring conditions and reactor design parameters

“…To generate the coded matrix, the STATISTICA 12 Software was used as support. The rotation speeds and mixing time (aging time) were defined based on the reactor's safety limits and LDH production data used in previous studies: Cermelj et al [ 20 ]; Di Cosimo et al [ 29 ]; Modrogan et al [ 17 ]; Teixeira et al [ 18 ]; Thite & Giripunje [ 21 ].…”

“…The studies conducted by Sun et al [ 16 ] already signaled the need to expand the study of reaction conditions by including other parameters, such as agitation rate and reagent addition rate. A literature search on process variables applied to the synthesis of LDHs identified some works that mention agitation rates (rpm) and reagent addition rates (mL/min): 200 rpm [ 17 , 18 ], 400 rpm [ 19 ], 700 rpm [ 20 ], 1200 rpm [ 21 ], 1300 rpm and 7.5 mL/min [ 22 ], 1400 rpm [ 23 ], 1 mL/min [ 24 , 25 ], 60 mL/min [ 26 ] and 4 mL/min [ 27 , 28 ]. However, in these works, the effects of these factors on LDH synthesis were not evaluated.…”