Spectroscopy — Tuning Lewis acidity of MIL-88B-Fe with mix-valence coordinatively unsaturated iron centers on ultrathin Ti3C2 nanosheets for efficient photo-Fenton reaction

12 measurement groups · 26 results

Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.

ESR with DMPO spin trapping

Electron paramagnetic resonance

CUCs-MIL-88B-Fe/Ti3C2 powder · Powder

10 uL sample containing 10 mg catalyst in water plus 10 uL 50 mM H2O2 and 10 uL 50 mM DMPO; visible light cutoff 420 nm; ambient temperature.

Measurement source: p.3,p.9-p.10 · 2.5; 3.6 · Fig. 14a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Hydroxyl radical generation orderMarked as a best value within this paper	CUCs-MIL-88B-Fe/Ti3C2 > CUCs-MIL-88B-Fe > MIL-88B-Fe > H2O2	—	—	Text Qualitative	p.9 · 3.6 · Fig. 14a

FTIR

Infrared spectroscopy

CUCs-MIL-88B-Fe/Ti3C2 powder · Powder

FTIR patterns of catalysts.

Measurement source: p.4 · 3.1 · Fig. 3b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ti-C / Ti3C2-related FTIR band	small FTIR band representing functional group or Ti-C stretching band of Ti3C2	—	—	Text Qualitative	p.4 · 3.1 · Fig. 3b

IR-pyridine

Infrared spectroscopy

CUCs-MIL-88B-Fe powder · Powder

Physisorbed pyridine removed under vacuum at 373 K before IR spectrum.

Measurement source: p.6-p.7 · 3.2.2 · Fig. 7b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
IR-pyridine Bronsted-acid band	1541 cm-1; later sentence also says 1633 cm-1 for pyridine coordination	—	—	Text Exact Reported	p.6 · 3.2.2 · Fig. 7b
IR-pyridine Bronsted+Lewis band	1470 cm-1	—	—	Text Exact Reported	p.6 · 3.2.2 · Fig. 7b
IR-pyridine Lewis-acid band	1435 cm-1	—	—	Text Exact Reported	p.6 · 3.2.2 · Fig. 7b

Photoluminescence

Photoluminescence and fluorescence spectroscopy

CUCs-MIL-88B-Fe/Ti3C2 powder · Powder

Room-temperature PL emission spectra with excitation wavelength 330 nm.

Measurement source: p.5-p.6 · 3.1 · Fig. 6b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Photoluminescence recombination indicatorMarked as a best value within this paper	weakest PL intensity among samples	—	—	Text Qualitative	p.6 · 3.1 · Fig. 6b

NH3 temperature-programmed desorption

CUCs-MIL-88B-Fe powder · Powder

ChemBET Pulsar TPR/TPD; 100 mg samples; exact machine conditions not detailed.

Measurement source: p.6-p.7 · 3.2.1 · Fig. 7a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CUCs-MIL-88B-Fe high-temperature NH3 desorption site	400.28 C	—	—	Text Exact Reported	p.6 · 3.2.1 · Fig. 7a
CUCs-MIL-88B-Fe low-temperature NH3 desorption site	142.25 C	—	—	Text Exact Reported	p.6 · 3.2.1 · Fig. 7a

NH3 temperature-programmed desorption

MIL-88B-Fe powder · Powder

ChemBET Pulsar TPR/TPD; 100 mg samples; exact machine conditions not detailed.

Measurement source: p.6-p.7 · 3.2.1 · Fig. 7a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
MIL-88B-Fe NH3-TPD thermal signal	162.35 C	—	—	Text Exact Reported	p.6 · 3.2.1 · Fig. 7a

UV-vis diffuse reflectance spectroscopy and Tauc analysis

UV-visible and optical absorption spectroscopy

CUCs-MIL-88B-Fe powder · Powder

DRS-derived Tauc plot in SI Fig. S2a.

Context: Activated pristine MIL-88B-Fe control.
Measurement source: p.2 · Fig. S2a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CUCs-MIL-88B-Fe absorption edge	509 nm	—	—	Text Rounded Reported	p.2 · Fig. S2a
CUCs-MIL-88B-Fe optical band gap	2.43 eV	—	—	Figure Axis Rounded Reported	p.2 · Fig. S2a

UV-vis diffuse reflectance spectroscopy and Tauc analysis

UV-visible and optical absorption spectroscopy

CUCs-MIL-88B-Fe/Ti3C2 powder · Powder

DRS measured by UV-250; Tauc plots from DRS data.

Measurement source: p.5 · 3.1 · Fig. 5; Fig. S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CUCs-MIL-88B-Fe/Ti3C2 absorption edge	514 nm	—	—	Text Exact Reported	p.5 · 3.1 · Fig. S2c
CUCs-MIL-88B-Fe/Ti3C2 optical band gapMarked as a best value within this paper	2.34 eV	—	—	Text Exact Reported	p.5 · 3.1 · Fig. S2c
Final composite broad visible absorption range	350-800 nm	—	—	Text Range	p.4 · 3.1 · Fig. 5

Tauc analysis from UV-vis DRS

UV-visible and optical absorption spectroscopy

Ultrathin Ti3C2 nanosheets · Nanosheet

SI Fig. S2b Tauc plot for Ti3C2Tx.

Context: Ti3C2 MXene component.
Measurement source: p.2 · Fig. S2b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ti3C2Tx Tauc-plot optical gap/intercept	1.95 eV	—	—	Figure Axis Rounded Reported	p.2 · Fig. S2b

XPS Fe 2p

X-ray photoelectron spectroscopy

CUCs-MIL-88B-Fe powder · Powder

Fe 2p high-resolution XPS after activation.

Measurement source: p.4-p.5 · 3.1 · Fig. 4b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CUCs-MIL-88B-Fe FeII deconvoluted peak	725.1 eV	—	—	Text Exact Reported	p.4 · 3.1 · Fig. 4b
CUCs-MIL-88B-Fe FeII deconvoluted peak	710.1 eV	—	—	Text Exact Reported	p.4 · 3.1 · Fig. 4b

XPS survey and high-resolution Ti/O/C spectra

X-ray photoelectron spectroscopy

CUCs-MIL-88B-Fe/Ti3C2 powder · Powder

Survey and high-resolution XPS of final composite.

Measurement source: p.4-p.5 · 3.1 · Fig. 4c,d; Table 1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
C 1s benzene-ring component	284.7 eV	—	—	Text Exact Reported	p.4 · 3.1 · Fig. 4d
C 1s carboxyl component	288.7 eV	—	—	Text Exact Reported	p.4 · 3.1 · Fig. 4d
O 1s Fe-O component	531.6 eV	—	—	Text Exact Reported	p.4 · 3.1 · Fig. 4d
O 1s organic-linker component	532.7 eV	—	—	Text Exact Reported	p.4 · 3.1 · Fig. 4d
Ti 2p Ti-C binding energy	454.5 eV	—	—	Text Exact Reported	p.4 · 3.1 · Fig. 4c
Ti 2p Ti-O binding energy	454.8 eV	—	—	Text Exact Reported	p.4 · 3.1 · Fig. 4c
Ti 2p Ti-O binding energy	464.5 eV	—	—	Text Exact Reported	p.4 · 3.1 · Fig. 4c

XPS Fe 2p

X-ray photoelectron spectroscopy

MIL-88B-Fe powder · Powder

Fe 2p high-resolution XPS.

Measurement source: p.4-p.5 · 3.1 · Fig. 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
MIL-88B-Fe Fe 2p1/2 centre	724.8 eV	—	—	Text Exact Reported	p.4 · 3.1 · Fig. 4a
MIL-88B-Fe Fe 2p3/2 centre	711.2 eV	—	—	Text Exact Reported	p.4 · 3.1 · Fig. 4a