Inspection and Testing Center for Quality of Cereals and Their Products Harbin

Harbin, China

Inspection and Testing Center for Quality of Cereals and Their Products Harbin

Harbin, China
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Sun Z.-B.,Heilongjiang University | Yin Y.-D.,Heilongjiang University | Fan N.-Y.,Heilongjiang University | Huang G.-Z.,Heilongjiang University | And 5 more authors.
Gongneng Cailiao/Journal of Functional Materials | Year: 2014

The photocatalysts that Fe3+/Gd3+ co-doped nanometre TiO2 supported on hollow glass microspheres (HGM) were synthesized by sol-gel method, and characterized by XRD, TEM techniques and DRS.The effects of the different calcination temperature, calcination time, deposition times, photocatalysts amount and reuse times on the photocatalytic activity were studied. Their photocatalytic activities were tested by degradation of nitrite.The results indicated that hollow glass microspheres coated with TiO2 can significantly enhance the photocatalytic activity of nano-particle. To calcinate 500°C for 2 h, load 2 times and the catalyst inputs for 2.0 g/L, has shown the highest catalytic activity, and the degradation percent of nitrite was about 93.81%.


Du Y.-Q.,Heilongjiang University | Du Y.-Q.,Inspection and Testing Center for Quality of Cereals and Their Products Harbin | Yin Y.-D.,Heilongjiang University | Fan N.-Y.,Heilongjiang University | And 7 more authors.
Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis | Year: 2012

Monoclinic fusiform zirconium dioxide (ZrO2) nanoparticles were synthesized by hydrothermal method, a method was established based on monoclinic fusiform nanometer-sized ZrO2 enrichment separation, and trace barium in water was determined by inductively coupled plasma mass spectrometry (ICP-MS). The detection limit for Ba(II) was 0.007 ng·mL-1, and the relative standard deviation was 0.13%(n=11). The optimal enrichment separation conditions of nanometer-sized ZrO2 for Ba(II) were studied in detail, it was found that the percentage of adsorbed Ba(II) was more than 99% under pH 10.0 and 2 mL 0.5 mol·L-1 HCl was sufficient for elution of Ba(II) by more than 98%. The static adsorption capacity of ZrO2 to Ba(II) was 196.6 μg·g-1 and enrichment factor was 250. Properties of nanometer-sized ZrO2 were discussed through regeneration experiment and effects of co-existing ions and contrast experiment to ordinary ZrO2, adsorption properties of nanometer-sized ZrO2 were applied to real samples in the analysis of Ba(II) and the determination was carried out by ICP-MS with satisfactory results.

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