Facile synthesis of 3D CuO nanowire bundle and its excellent gas sensing and electrochemical sensing properties

A general ligand-assisted self-assembly approach to crystalline mesoporous metal oxides

“…Metal nitrate and the triblock copolymer Pluronic P123 were employed as the precursor and the template, respectively. In a typical synthesis of mesoporous Co 3 O 4 , 1.36 × 10 −4 mol of P123, 5 mmol of citric acid, and 16 mmol of concentrated HNO 3 were dissolved in 70 mmol of 1-butanol solution under magnetic stirring followed by the addition of 2.5 mmol of the inorganic source Co(NO 3 ) 2 ·6H 2 O. The mixture was stirred vigorously for several hours at room temperature until a transparent sol formed.…”

“…Mesoporous transition metal oxides possessing a large surface area and high degree of crystallization have attracted extensive attention because of their remarkable properties and promising applications in gas sensing, energy storage, catalysis, and photodetection [1][2][3][4][5][6][7][8] . Various strategies have been used to synthesize mesoporous transition metal oxides.…”

Cu-MOF: an efficient heterogeneous catalyst for the synthesis of symmetric anhydrides via the C–H bond activation of aldehydes

“…Recycled Cu 2 (BDC) 2 DABCO after 5 runs maintained its crystallinity based on PXRD ( Fig. 3 ), but a slight degradation of the structure and hydrolysis reaction 44,45 could possibly justify the presence of the peaks at higher values of 2 θ (30–40°), which probably indicates the presence of Cu(OH) 2 or CuO, 46 which are direct products of this reaction. In fact, under TBHP (70%) conditions, little water molecules are able to condense into the cavities of the material and it finally becomes energetically favorable for H 2 O to hydrolyze the Cu–O bond, breaking the crystalline structure.…”

“…Recycled Cu 2 (BDC) 2 DABCO aer 5 runs maintained its crystallinity based on PXRD (Fig. 3), but a slight degradation of the structure and hydrolysis reaction 44,45 could possibly justify the presence of the peaks at higher values of 2q (30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40), which probably indicates the presence of Cu(OH) 2 or CuO, 46 which are direct products of this reaction. In fact, under TBHP (70%) Scheme 3 The proposed mechanism for the synthesis of symmetric carboxylic anhydrides via C-H activation.…”

EFFECT OF TEMPERATURE ON THE STRUCTURE AND PROPERTIES OF Fe2O3/GRAPHENE NANOCOMPOSITES SYNTHESIZED BY HYDROTHERMAL METHOD

“…Recently, transition metal oxides have been widely studied in various fields to constitute composite materials with graphene in order to enhance its properties in application. Among the various transition metal oxides, such as ZnO [19], TiO 2 [20], Fe 3 O 4 [21], CuO [22], SnO 2 [23]; Fe 2 O 3 is one of the most common oxides in the natural world. Due to its low cost, environmental friendliness, chemical stability and nontoxic, Fe 2 O 3 has been extensively studied in lithium batteries [24], catalysis [25], sensors [16], magnetic materials [26], biological and medical fields [27].…”