Working Paper Article Version 1 This version is not peer-reviewed

Glycine–Nitrate Combustion Synthesis and Photocatalytic Degradation Properties of Cu-Based Nanoparticles

Version 1 : Received: 9 December 2019 / Approved: 10 December 2019 / Online: 10 December 2019 (15:20:25 CET)

How to cite: Cheng, H.; Chen, S.; Jang, L.; Liu, H. Glycine–Nitrate Combustion Synthesis and Photocatalytic Degradation Properties of Cu-Based Nanoparticles. Preprints 2019, 2019120137 Cheng, H.; Chen, S.; Jang, L.; Liu, H. Glycine–Nitrate Combustion Synthesis and Photocatalytic Degradation Properties of Cu-Based Nanoparticles. Preprints 2019, 2019120137

Abstract

Copper-based nanoparticles were synthesized using the glycine–nitrate process (GNP) by using copper nitrate trihydrate [Cu(NO3)2‧3H2O] as the main starting material and glycine [C2H5NO2] as the complexing and incendiary agent. The as-prepared powders were characterized through X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) analysis, X-ray photoelectron spectroscopy, and scanning electron microscopy. Using Cu(NO3)2.3H2O as the oxidizer (N) and glycine as fuel (G), we obtained CuO, mixed-valence copper oxides (CuO + Cu2O, G/N = 0.3–0.5), and metallic Cu (G/N = 0.7). The XRD and BET results indicated that increasing the glycine concentration (G/N = 0.7) and reducing particle surface area increased the yield of metallic Cu. The effects of varying reaction parameters such as catalyst activity, catalyst dose, and H2O2 concentration on nonylphenol-9-polyethoxylate (NP9EO) degradation were assessed. With a copper‐based catalyst in a heterogeneous system, the NP9EO and total organic carbon removal efficiencies were 83.1% and 70.6%, respectively, under optimum operating conditions (pH, 6.0; catalyst dose, 0.3 g/L; H2O2 concentration, 0.05 mM). The results suggested that removal efficiency increased with an increase in H2O2 concentration but decreased when the H2O2 concentration exceeded 0.0.5 mM. Furthermore, the trend of photocatalytic activity was as follows: G/N = 0.5 > G/N = 0.7 > G/N = 0.3. The G/N = 0.5 catalysts showed the highest photocatalytic activity and resulted in 94.6% NP9EO degradation in 600 min.

Subject Areas

glycine-nitrate process; copper oxide nanopowders; heterogeneous catalysis; NP9EO

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