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- Title
A low-cost preparation of waste-based PANI/NiFe<sub>2</sub>O<sub>4</sub> composite for photocatalytic hydrogen evolution.
- Authors
Dan Chen; Yan Yang; Xiaonan Wang; Yao Xu; Guangren Qian
- Abstract
An economical photocatalyst, waste-based PANI/NiFe2O4 composite was successfully synthesized from aniline wastewater, electroplating wastewater and pickling waste liquor. The obtained photocatalysts were characterized by XRD, TEM, XPS, FTIR spectra and VSM techniques. The material exhibited good magnetic property with high saturation magnetization (41.09 emu g-1). After 3 h visible light irradiation, the hydrogen evolution capacity of waste-based PANI, NiFe2O4 and PANI/NiFe2O4 composite were 1.28, 5.10 and 8.94 mmol g-1 respectively. Among these materials, waste-based PANI/NiFe2O4 exhibited the optimum photocatalytic activity. Besides, waste-based PANI/NiFe2O4 also displayed higher photocatalytic hydrogen production than pure PANI/NiFe2O4 that has been studied before. Waste-based NiFe2O4 was responsible for the enhanced photocatalytic activity. The reaction mechanism of waste-based NiFe2O4 was researched in two parts: the effect of Cr3+ and organic impurities for structure formation of waste-based NiFe2O4 during in-situ polymerization process. The synthesized waste-based NiFe2O4 exhibited larger specific surface area and smaller grain structure than pure NiFe2O4, which facilitated the photocatalytic activity. Preparation of photocatalyst from wastewater could not only reduce environmental pollution but also produce new material for other application. The proposed preparation method of waste-based photocatalyst composite had great potential in the field of wastewater treatment and photocatalysis.
- Subjects
POLLUTION; WASTEWATER treatment; HYDROGEN production; HYDROGEN; VISIBLE spectra; INDUSTRIAL contamination
- Publication
Desalination & Water Treatment, 2019, Vol 155, p190
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2019.24050