Data supporting: "Microwave-assisted deep eutectic-solvothermal preparation of iron oxide nanoparticles for photoelectrochemical solar water splitting"

Data collection method:

WAXS: Data were collected on pure, and heat-treated DES samples, using the wide-angle detector at the I22 instrument of Diamond Light Source, UK. Samples were measured in glass capillaries at 30 C. XRD: Diffraction data of the prepared powders were collected using a Bruker D8-ADVANCE instrument provided by the University of Bath CCAF. Magnetometry: M(H) and M(T) measurements of the prepared solids were made using either a Quantum Design PPMS Vibrating Sample Magnetometer, or a Quantum Design MPMS-XL SQUID Magnetometer. Photoelectrochemistry: PEC measurements were made of the prepared photoanodes using an in-house solar simulator and a three-electrode cell. Full details of data collection methodology are given in the article.

Data processing and preparation activities:

WAXS data were treated using the DAWN software suite, with the following processing steps performed: - Detector calibration - Masking - Calculation of errors - Azimuthal reduction (I vs q reduction) - Division by I(t) (Transmitted intensity) - Multiplication by I(0) (Primary beam intensity) - Background subtraction No significant processing steps can be reported for the other data givenhere, other than basic background subtraction (XRD), and normalisation to either the sample mass (magnetometry measurements) or the sample area (PEC measurements)

Technical details and requirements:

Where possible, all data has been provided as tab-delimited text files. Due to the large volume of data, the magnetometry data has been provided as a collection of Microsoft Excel sheets.