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4 protocols using sb 2 s 3

1

Synthesis and Characterization of Multicomponent Oxide Minerals

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Samples were synthesised from stoichiometric amounts of Fe 2 O 3 , Fe metal, MgO, Sb 2 O 3 and Sb 2 S 3 (all >99%, Aldrich), ground and heated within sealed quartz ampoules between 520 °C and 600 °C for between 48 hours and 1 month, with intermediate grinding. Slow cooling was necessary in order to minimise structural disorder. Phase purity was checked with laboratory X-ray powder diffraction (XRPD) equipment (Bruker D2 [Co Kα] and Bruker D8 [Cu Kα 1 ], both with PSD LynxEye dectector). Neutron powder diffraction (NPD) data were collected at Institut Laue-Langevin (D2B diffractometer, λ = 1.594 Å), Paul-Scherrer Institute (HRPT instrument, λ = 1.494 Å and 1.886 Å) and the ISIS facility, UK (GEM diffractometer, TOF) at a range of temperatures in He cryostats. Refinements were performed using GSAS with the EXPGUI interface. 9,10 Mineralogical samples were obtained from Systematic Mineralogy and removed from parent dolomite samples using a mineral drill. XRPD showed a small amount of residual dolomite within the samples.
Magnetic susceptibility measurements were obtained using a Quantum Design MPMS under field-cooled (FC) and zero-fieldcooled (ZFC) conditions, with an applied magnetic field of 500 Oe. Powdered sample was loaded into a gelatin capsule, and sample movement was suppressed using a small amount of PTFE tape. No diamagnetic correction was applied to the data.
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2

Colloidal Nanocrystal Synthesis Protocols

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Selenium dioxide (SeO2, 99.9+%,
Strem), oleic acid (OA, 90%, Aldrich), 1-octadecene (ODE, 90%, Aldrich),
methanol (Aldrich, 98%), cadmium nitrate tetrahydrate (Cd(NO3)2 × 4H2O, 99.99%, Aldrich), CdO (99.99+,
Sigma-Aldrich), myristic acid (MA, 99%, Aldrich), sodium hydroxide
(NaOH, Aldrich), hexane (>95% Sigma-Aldrich), ethanol (99.8%, Fluka),
toluene (99%, Fischer), formamide (FA, 99.5+%, Aldrich), acetonitrile
(MeCN, 99.9%, Sigma-Aldrich), N-methyl formamide
(MFA, 99%, Aldrich), dimethylformamide (DMF, 99.8%, Sigma-Aldrich),
hydrazine (98%, anhydrous, Aldrich), potassium sulfide (K2S, 99.5%, Strem), ammonium sulfide (40–48% solution in water,
Aldrich), antimony(III) sulfide (Sb2S3, 99.995%,
Aldrich), germanium(II) sulfide (GeS, 99.99%, Aldrich), sulfur (99.998%,
Sigma-Aldrich), As2S5 (99.99%, Sigma-Aldrich),
triethyloxonium tetrafluoroborate (98%, Fluka), Na2S nanohydrate
(98%, Aldrich), ammonium thiocyanate (97.5%, Aldrich), sodium stannate
trihydrate (95%, Sigma-Aldrich), C6D6 (99.9%,
CIL), and DMSO-d6 (99.9%, CIL) were used
as received.
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3

Fabrication of Sodium-Ion Battery Anode

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Carbon black (Super C65, TIMCAL), carboxymethyl cellulose (CMC, Grade: 2200, Lot No. B1118282, Daicel Fine Chem Ltd.), NaClO4 (98%, Alfa Aesar, additionally dried), propylene carbonate (BASF, battery grade), 4-fluoro-1,3-dioxolan-2-one (FEC, Hisunny Chemical, battery grade), 1 M solution of LiPF6 in ethylene carbonate/dimethyl carbonate (EC/DMC, Novolyte, Celgard separator (Celgard 2400, 25 µm microporous monolayer polypropylene membrane, Celgard Inc. USA), glass microfiber separator (GF/D, Cat No. 1823–257, Whatman), Al foil (MTI Corporation), Na foil (Sigma-Aldrich), Li foil (MTI Corp.), Sb2S3 (99.995%, Sigma Aldrich), Coin-type cells (Hohsen Corp., Japan),
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Synthesis and Characterization of Sb₂S₃ Materials

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Two different types of Sb2S3 samples were evaluated in this study: (1) Bulk crystalline Sb2S3 was obtained from Sigma Aldrich and used as it is (denoted as “Sb2S3” in the paper). (2) Crystalline Sb2S3 wire were made by an aqueous precipitation between SbCl3 in acetone and sodium thiosulfate (Na2S2O3) followed by a hydrothermal annealing at 150°C for 4 hours, adopted from procedure of Li et al.31 .
Structure of the materials was studied by powder X-ray diffraction (XRD) with a Cu K_alpha (Bruker). Morphology and particle size of the tested materials were studied by field emission scanning electron microscope (SEM) with a JOEL JSM-7600F.
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