Controllable Acid/Base Propriety of Sulfate Modified Mixed Metal Oxide Derived from Hydrotalcite for Synthesis of Propylene Carbonate

Ammonium persulfate modified mixed metal oxide derived from hydrotalcite with tunable acid/base properties can be prepared via thermal decomposition of Mg-Al hydrotalcite-type precursors and ammonium persulfate. By controlling the ammonium persulfate content, these sulphur mutated samples, denoted as SMgAlO-y (y = 1; 3; 5; 7), were investigated in this research. The resulted materials were characterized by XRD, SEM, FT-IR spectra, Py-IR spectra, XPS, Hammett indicator, CO2-TPD, as well as NH3-TPD. Furthermore, the acid-base property of the sample surface was determined by inverse gas chromatography measurements (IGC). Among all the obtained outcomes, the target SMgAlO-5 demonstrated the maximal Ka/Kb value, and it presented the highest activity as a catalyst in the synthesis of propylene carbonate (PC) through 1,2-propylene glycol and urea, giving the yield of 97.2% at the optimized reaction condition, which indicated that the PC yield counted on the synergic effect of the acidity and basicity on catalysts.

Download Full-text

Accelerated life test method of mixed metal oxide anodes for cathodic protection

10.3403/30326549u ◽

2018 ◽

Keyword(s):

Metal Oxide ◽

Cathodic Protection ◽

Test Method ◽

Accelerated Life Test ◽

Mixed Metal Oxide ◽

Life Test ◽

Mixed Metal ◽

Accelerated Life

Download Full-text

Bimetallic Mixed Metal Oxide (CuO/NiO) In Fusion with Nitrogen-doped Graphene Oxide: An Alternate Approach for Developing Potential Biocarrier

Journal of Environmental Chemical Engineering ◽

10.1016/j.jece.2021.105781 ◽

2021 ◽

pp. 105781

Author(s):

Periasamy Anbu ◽

Subash C.B. Gopinath ◽

Kandasamy Saravanakumar ◽

Sekar Vijayakumar ◽

Santheraleka Ramanathan ◽

...

Keyword(s):

Graphene Oxide ◽

Metal Oxide ◽

Mixed Metal Oxide ◽

Mixed Metal ◽

Nitrogen Doped ◽

Nitrogen Doped Graphene ◽

Doped Graphene

Download Full-text

Rare earth—platinum group mixed metal oxide systems

Journal of Alloys and Compounds ◽

10.1016/0925-8388(94)90135-x ◽

1994 ◽

Vol 210 (1-2) ◽

pp. 177-184 ◽

Cited By ~ 3

Author(s):

K.M. Cruickshank ◽

F.P. Glasser

Keyword(s):

Rare Earth ◽

Metal Oxide ◽

Mixed Metal Oxide ◽

Oxide Systems ◽

Mixed Metal ◽

Platinum Group

Download Full-text

High yield room temperature conversion of carbon dioxide into cyclic carbonates catalyzed by mixed metal oxide (CuO‐ZnO) nano‐flakes/micro‐flakes (Cozi‐nmf)

Applied Organometallic Chemistry ◽

10.1002/aoc.6224 ◽

2021 ◽

Author(s):

Venkateswara Rao Velpuri ◽

Krishnamurthi Muralidharan

Keyword(s):

Carbon Dioxide ◽

Metal Oxide ◽

Room Temperature ◽

High Yield ◽

Mixed Metal Oxide ◽

Cyclic Carbonates ◽

Mixed Metal

Download Full-text

Y3+ and Sm3+ co-doped mixed metal oxide nanocomposite: Structural, electrochemical, photocatalytic, and antibacterial properties

Applied Surface Science Advances ◽

10.1016/j.apsadv.2021.100085 ◽

2021 ◽

Vol 4 ◽

pp. 100085 ◽

Cited By ~ 1

Author(s):

Karthik Kannan ◽

D Radhika ◽

D. Gnanasangeetha ◽

L. Sivarama Krishna ◽

K Gurushankar

Keyword(s):

Metal Oxide ◽

Antibacterial Properties ◽

Mixed Metal Oxide ◽

Mixed Metal ◽

Co Doped

Download Full-text

Selective Catalytic Oxidation of Toluene to Benzaldehyde: Effect of Aging Time and Calcination Temperature Using CuxZnyO Mixed Metal Oxide Nanoparticles

Catalysts ◽

10.3390/catal11030354 ◽

2021 ◽

Vol 11 (3) ◽

pp. 354

Author(s):

Khadijah H. Alharbi ◽

Ali Alsalme ◽

Ahmed Bader A. Aloumi ◽

Mohammed Rafiq H. Siddiqui

Keyword(s):

Metal Oxide ◽

Calcination Temperature ◽

Aging Time ◽

Metal Oxide Nanoparticles ◽

Catalytic Performance ◽

Molar Ratio ◽

Mixed Metal Oxide ◽

Toluene Oxidation ◽

Mixed Metal ◽

Selective Catalytic Oxidation

Oxidation is an important organic transformation, and several catalysts have been reported for this conversion. In this study, we report the synthesis of mixed metal oxide CuxZnyO, which is prepared by a coprecipitation method by varying the molar ratio of Cu and Zn in the catalytic system. The prepared mixed metal oxide CuxZnyO was evaluated for catalytic performance for toluene oxidation. Various parameters of the catalytic evaluation were studied in order to ascertain the optimum condition for the best catalytic performance. The results indicate that aging time, calcination temperature, reaction temperature, and feed rate influence catalytic performance. It was found that the catalyst interfaces apparently enhanced catalytic activity for toluene oxidation. The XRD diffractograms reveal the crystalline nature of the mixed metal oxide formed and also confirm the coexistence of hexagonal and monoclinic crystalline phases. The catalyst prepared by aging for 4 h and calcined at 450 °C was found to be the best for the conversion of toluene to benzaldehyde while the reactor temperature was maintained at 250 °C with toluene fed into the reactor at 0.01 mL/min. The catalyst was active for about 13 h.

Download Full-text