SrFe0.9−xCuxNb0.1O3−δ (x = 0–0.4) were synthesised by a sol-gel process, similar to previously reported processes20 . A stoichiometric amount of C4H4NNbO9·xH2O (99.9%, Sigma Aldrich) was dissolved in distilled water. H2O2 was added to the niobium solution until a colour change was elicited. Citric acid (99+%, Alfa Aesar), in a 2:1 molar ratio to the metal ions in the final product, was added and heated till a solution was formed. Stoichiometric amounts of Sr(NO3)2 (98%, Alfa Aesar), Fe(NO3)3·9H2O (98%, Alfa Aesar) and Cu(NO3)2·2.5 H2O (ACS grade, Alfa Aesar) were dissolved in distilled water. The solutions were mixed first then heated until gelation. The resultant gel formed was fired at 600 °C for 2 hours and further fired at 1200–1300 °C for 4–24 hours. The as-prepared powders were uniaxially pressed at 221 MPa in to pellets (ø ≈ 13 mm × 2 mm) and subsequently sintered in air at 1200 °C–1450 °C for 4–10 hours. The details are listed in Table S1 .
Sr no3 2
Manufactured by Thermo Fisher Scientific
Sourced in Poland, Belgium
Sr(NO3)2 is a chemical compound composed of strontium and nitrate ions. It is a white, crystalline solid that is soluble in water. Sr(NO3)2 is commonly used as a laboratory reagent and in various industrial applications.
Automatically generated - may contain errors
Lab products found in correlation
Fe no3 3 9h2o, by Thermo Fisher Scientific (2 mentions)
Citric acid, by Thermo Fisher Scientific (1 mentions)
C4h4nnbo9 xh2o, by Merck Group (1 mentions)
Nd no3 3 6h2o, by Merck Group (1 mentions)
Arsenazo 3, by Merck Group (1 mentions)
Nh4 6mo7o24 4h2o, by Merck Group (1 mentions)
Nbcl5, by Thermo Fisher Scientific (1 mentions)
Tacl5, by Thermo Fisher Scientific (1 mentions)
Zn no3 2 6h2o, by Chempur (1 mentions)
Ca no3 2 4h2o, by Thermo Fisher Scientific (1 mentions)
Nh4 2hpo4, by Thermo Fisher Scientific (1 mentions)
Tetraethyl orthosilicate teos, by Thermo Fisher Scientific (1 mentions)
Citric acid c6h8o7, by Merck Group (1 mentions)
Nh4no3, by Merck Group (1 mentions)
Na2so4, by Chem-Lab (1 mentions)
Nh4cl, by Chem-Lab (1 mentions)
Aliquat 336, by Merck Group (1 mentions)
Dicyclohexano 18 crown 6 dch18c6, by Merck Group (1 mentions)
Lino3, by Thermo Fisher Scientific (1 mentions)
Lithium chloride (licl), by Merck Group (1 mentions)
7 protocols using sr no3 2
1
Synthesis of Strontium-Iron-Copper-Niobium Oxides
2
Synthesis and Characterization of Rare-Earth Complexes
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The manipulations described
below were performed
primarily under aerobic conditions. BPP-7 was prepared according to
a literature method33 (link) and desolvated under
vacuum at 150 °C for 24 h prior to use. The compounds Nd(NO3)3·6H2O (Sigma-Aldrich, 99.9%,
Trace Metals Basis), Sr(NO3)2 (Alfa Aesar, 99.97%,
Metals Basis), and Fe(NO3)3·9H2O (Alfa Aesar, >98%, Metals Basis) were purchased from commercial
vendors, and used as received. Arsenazo III (1,8-dihydroxynaphthalene-3,6-disulfonic
acid-2,7-bis[(azo-2)-phenylarsonic acid]) was purchased from Aldrich,
and used as received. A Varian Cary 5 UV–visible spectrophotometer
was used for all absorbance measurements.
below were performed
primarily under aerobic conditions. BPP-7 was prepared according to
a literature method33 (link) and desolvated under
vacuum at 150 °C for 24 h prior to use. The compounds Nd(NO3)3·6H2O (Sigma-Aldrich, 99.9%,
Trace Metals Basis), Sr(NO3)2 (Alfa Aesar, 99.97%,
Metals Basis), and Fe(NO3)3·9H2O (Alfa Aesar, >98%, Metals Basis) were purchased from commercial
vendors, and used as received. Arsenazo III (1,8-dihydroxynaphthalene-3,6-disulfonic
acid-2,7-bis[(azo-2)-phenylarsonic acid]) was purchased from Aldrich,
and used as received. A Varian Cary 5 UV–visible spectrophotometer
was used for all absorbance measurements.
3
Synthesis of SrBO3 Nanoparticles
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Sr1–xBO3 (SBO) nanoparticles were synthesized using a two-step coprecipitation/oxygen-controlled
crystallization approach described elsewhere.7 (link) Briefly, A-site (Sr(NO3)2, Alfa Aesar, 99.0%,
ACS grade), and B-site (NbCl5, Alfa Aesar, 99.0% metals
basis; (NH4)6Mo7O24·4H2O, Sigma-Aldrich; TaCl5, Alfa Aesar, 99.99% metals
basis) salt precursors were precipitated using ammonium hydroxide
(NH4OH, 28–30%, ACS grade) at a pH of 9.5. Next,
the as-prepared powder was ground with a eutectic molar ratio of NaNO3 (high purity grade, VWR Amresco, 99.0%) and KNO3 (ACS grade, VWR Amresco) to form a homogeneous powder. The mixture
was then transferred to a porcelain boat and heated in a tube furnace
at 600 °C under 0.2 Torr pressure for 2 h. After cooling, the
resultant powder was washed several times with deionized water and
dried overnight at 100 °C. Finally, as-synthesized NPs were annealed
in a tube furnace at 800 °C under a H2/Ar (5/95%)
atmosphere with varying times (0–6 h).
crystallization approach described elsewhere.7 (link) Briefly, A-site (Sr(NO3)2, Alfa Aesar, 99.0%,
ACS grade), and B-site (NbCl5, Alfa Aesar, 99.0% metals
basis; (NH4)6Mo7O24·4H2O, Sigma-Aldrich; TaCl5, Alfa Aesar, 99.99% metals
basis) salt precursors were precipitated using ammonium hydroxide
(NH4OH, 28–30%, ACS grade) at a pH of 9.5. Next,
the as-prepared powder was ground with a eutectic molar ratio of NaNO3 (high purity grade, VWR Amresco, 99.0%) and KNO3 (ACS grade, VWR Amresco) to form a homogeneous powder. The mixture
was then transferred to a porcelain boat and heated in a tube furnace
at 600 °C under 0.2 Torr pressure for 2 h. After cooling, the
resultant powder was washed several times with deionized water and
dried overnight at 100 °C. Finally, as-synthesized NPs were annealed
in a tube furnace at 800 °C under a H2/Ar (5/95%)
atmosphere with varying times (0–6 h).
4
Synthesis of Sr-Zn-Doped Nano-Hydroxyapatite
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The nanosilicate-substituted hydroxyapatite doped with Sr2+ ions and co-doped with Zn2+ ions was synthesized using the hydrothermal wet technique. Ca(NO3)2∙4H2O (99.0–103.0% Alfa Aesar), (NH4)2HPO4 (>99.0% Acros Organics), tetraethyl orthosilicate TEOS (>99% Alfa Aesar), Sr(NO3)2 (99.0% min Alfa Aesar) and Zn(NO3)2∙6H2O (pure, Chempur, Poland) were used as substrates. The stoichiometric amounts of all starting substrates were dissolved in deionization water, then placed into a Teflon vessel and mixed. The pH was adjusted with ammonia (NH3∙H2O 25% Avantor, Poland) to obtain a pH = 10. The hydrothermal process was carried out in the microwave reactor (ERTEC MV 02-02) for 90 min at elevated temperature (250 °C) and under autogenous pressure (40–50 bar). The obtained nanocrystalline powders were centrifuged, rinsed several times with deionized water and dried. Afterwards, the materials were heat-treated in the range of 600–800 °C for 3 h to reject the amorphous phase and receive well-crystalized products with the chemical formula of Ca9.8−xnSrnZnx(PO4)6−y(SiO4)y(OH)2 (where: n = 0.2 [mol%]; x = 0.5–3.5 [mol%]; y = 4–5 [mol%]). The concentration of Sr2+ and Zn2+ was set in a ratio to entire calcium ions molar content in the following routine.
5
Synthesis of Perovskite Oxide LSC
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To synthesize the LSC perovskite oxides, an aqueous solution containing dissolved La, Sr, and Co nitrites (La(NO3)3 ∙ 6H2O, Sr(NO3)2, Co(NO3)2 ∙ 6H2O, Alfa Aesar) in stoichiometric amounts and citric acid (C6H8O7, Sigma-Aldrich) in deionized water was prepared. Post solvent evaporation, the resulting wet-gel was calcined at 900 °C for 2 h and at 950 °C for 10 h to remove the organic fraction. Finally, the resulting reaction product was mortared to homogenize the LSC.
6
Synthesis of TiO2-SrMn Nanocomposites
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TiO2 (>99.5%, Aeroxide P25 powder, Acros Organics), Sr(NO3)2 (>99%, Acros Organics), Mn(NO3)2·4H2O (analytical grade, Acros Organics), NaBH4 (≥98%, white powder, MP Biomedical), MgO (Fisher Science Education), and ethanol (200 proof, ACS/USP grade, Pharmco-Aaper) were used as received.
7
Solvent Extraction of Lanthanides
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Tricaprylammonium chloride (Aliquat® 336, [A336][Cl], 88.2–90.6%), dicyclohexano-18-crown-6 (DCH18C6, ≥98%), LiCl (99%) and HNO3 (≥65%) were purchased from Sigma-Aldrich (Diegem, Belgium). SmCl3·6H2O (99.9%) and Eu(NO3)3·6H2O (99.9%) were purchased from Strem Chemicals, Inc. (Newburyport, USA). Sm(NO3)3·6H2O (99.9%) and LiNO3 (anhydrous, 99%) were purchased from Alfa Aesar (Karlsruhe, Germany). EuCl3·6H2O (99.9%), Sr(NO3)2 (99.9%) and granular zinc (30 mesh, ≥99.7%) were purchased from Acros Organics (Geel, Belgium). SrCl2·6H2O (≥99%), NH4Cl (≥99.8%), Na2SO4 (≥99%) and acetonitrile (≥99.5%) were purchased from Chem-Lab (Zedelgem, Belgium), as well as the Sm, Eu, Zn and Cu standard solutions (≥99.99%, 1000 μg mL−1, 2–5% HNO3, Plasma HIQU). NH4NO3 (≥99%) was purchased from Merck Millipore (Darmstadt, Germany). All products were used as received, without any further purification steps. Aqueous samples were prepared with Milli-Q water (18.2 MΩ cm at 25 °C).
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