Synthesis and characterization of (NH₄)_1.5Cu₂Cr₂O₈(OH)_1.5⋅H₂O

Abstract

A new single-phase copper chromate compound was successfully synthesized by a hydrothermal method and characterized by XRD, SEM, TGA, and XRF analysis. The experimental XRD pattern was analyzed by automatic indexing and the compound was found to be monoclinic with space group P2 1 / a and unit-cell parameters of a = 10.1829͑11͒ Å, b = 4.9516͑6͒ Å, c = 7.2899͑7͒ Å, and ␤ = 103.64͑1͒°. The chemical formula of the copper chromate compound determined by XRF and TGA was determined to be ͑NH 4 ͒ 1.5 Cu 2 Cr 2 O 8 ͑OH͒ 1.5 ·H 2 O. XRD results also showed that the synthesized compound decomposed into CuCr 2 O 4 and CuO after being calcined at 600°C. © 2009 International Centre for Diffraction Data.

Generation of Hydrogen Gas Using CuCr2O4-g-C3N4 Nanocomposites under Illumination by Visible Light

“…It could be derived from the data of Figure that g-C 3 N 4 retains its peaks’ position even after incorporation with CuCr 2 O 4 NPs in the constructed heterojunctions, affirming that g-C 3 N 4 conserves its graphitic layer arrangement. Nevertheless, exfoliation of g-C 3 N 4 graphitic layers in the heterojunctions during sonication owing to the inclusion of CuCr 2 O 4 NPs could be confirmed from the suppression of peak intensity assigned to the (002) plane of g-C 3 N 4 . − The inset X-ray diffractogram of neat CuCr 2 O 4 displays the peaks characterizing the planes assigned to the crystalline CuCr 2 O 4 planes (JCPDS# 05-0657). , …”

“…Nevertheless, exfoliation of g-C 3 N 4 graphitic layers in the heterojunctions during sonication owing to the inclusion of CuCr 2 O 4 NPs could be confirmed from the suppression of peak intensity assigned to the (002) plane of g-C 3 N 4 . 31 − 34 The inset X-ray diffractogram of neat CuCr 2 O 4 displays the peaks characterizing the planes assigned to the crystalline CuCr 2 O 4 planes (JCPDS# 05-0657). 29 , 30 …”

Materials Based on Co, Cu, and Cr as Activators of PMS for Degrading a Representative Antibiotic—The Strategy for Utilization in Water Treatment and Warnings on Metal Leaching

“…Figure 1a presents the XRD pattern of the synthesized material. This pattern shows a perfect correlation with the chromate phase Φy (corresponding to (NH 4 ) 1.5 Co x Cu 2−x Cr 2 O 8 (OH) 1.5 •H 2 O, [14]) according to the ICSD database 98-009-3960. Table 1 summarizes the composition and the BET results.…”

Identifikasi Fasa dan Informasi Kristal Nanopartikel Oksida Spinel CuCr2O4 Memanfaatkan Analisis XRD Berbasis Metode Rietveld Refinement

“…Proses produksi melalui beragam metode sintesis seperti sol-gel, self combustion, hydrothermal, beserta reaksi padatan telah dimanfaatkan untuk membentuk kondisi fasa tunggal dari material CuCr2O4 [8,12,13,14]. Pemilihan proses sintesis dari CuCr2O4 menjadi penting untuk diperhatikan agar dapat membentuk nanopartikel yang diharapkan.…”

“…Salah satu tahapan yakni pemanfaatan basis prekursor menunjukkan bahwa pemanfaatan prekursor berbasis nitrat menghasilkan ukuran kristalit maupun partikel di skala nano melalui beragam metode sintesis, diantaranya yakni microwave method maupun facile synthesis [7,15]. Metode sintesis juga menyertakan keterlibatan faktor termal menunjukkan bahwa suhu termal pembentukan dari material CuCr2O4 berada di rentang suhu 600 o C [7,14,15]. Riset ini ingin menunjukkan bahwa rute berbasis metode sintesis sol-gel dapat membentuk CuCr2O4 ketika perkenaan suhu termal produksi di suhu 1.000 o C demi membuktikan ketahanan material CuCr2O4 berada direntang suhu tersebut.…”