Electrochemistry Application — M-008: A stable and reusable metalorganic framework with high crystallinity applied in the photocatalytic hydrogen evolution and the degradation of methyl orange

13 measurement groups · 25 results

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

Electrochemical impedance spectroscopy; three-electrode photoelectrochemical quartz cell

Photoresponse and photoelectrochemistry Impedance spectroscopy

M-008a/Nafion thin film on ITO · Electrode

0.5 M Na2SO4 aqueous electrolyte; M-008/Nafion film on ITO working electrode; Pt counter electrode; Ag/AgCl reference.

Geometry: thin film on ITO working electrode
Context: Nafion-bound MOF film on ITO
Measurement source: 2,5,7 · Instrumentation; Electrochemical characterization · Fig. 6a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source

Electrochemical impedance spectroscopy; three-electrode photoelectrochemical quartz cell

Photoresponse and photoelectrochemistry Impedance spectroscopy

M-008b/Nafion thin film on ITO · Electrode

0.5 M Na2SO4 aqueous electrolyte; M-008/Nafion film on ITO working electrode; Pt counter electrode; Ag/AgCl reference.

Geometry: thin film on ITO working electrode
Context: Nafion-bound MOF film on ITO
Measurement source: 2,5,7 · Instrumentation; Electrochemical characterization · Fig. 6a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Relative charge-transfer resistance from Nyquist arcMarked as a best value within this paper	M-008b has a smaller arc radius / lower resistance than M-008a	—	—	Text Qualitative	7 · Electrochemical characterization · Fig. 6a

Photocatalytic methyl orange degradation under solar irradiation

M-008a · Powder

0.1 g sample in 200 mL of 100 mg/L methyl orange; room temperature; pH 6; no H2O2 or O2 addition; stirred 1 h in dark then illuminated for 4 h; absorbance at 464 nm.

Temperature: room temperature
Geometry: 200 mL glass reactor; solar simulator 15 cm above reactor
Context: pristine powder photocatalyst
Measurement source: 2,8-9 · Photocatalytic test; MO degradation · Fig. 11; Table 1; Table 4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Methyl orange degradation	81%	—	—	Table Rounded Reported	6,8-9 · MO degradation · Fig. 11; Table 1; Table 4
Time to reported maximum MO degradation	approximately 180 min	—	approximately	Text Approximate	9 · MO degradation · Table 4

Photocatalytic methyl orange degradation under solar irradiation

M-008b · Powder

0.1 g sample in 200 mL of 100 mg/L methyl orange; room temperature; pH 6; no H2O2 or O2 addition; stirred 1 h in dark then illuminated for 4 h; absorbance at 464 nm.

Temperature: room temperature
Geometry: 200 mL glass reactor; solar simulator 15 cm above reactor
Context: pristine powder photocatalyst
Measurement source: 2,8-9 · Photocatalytic test; MO degradation · Fig. 11; Table 1; Table 4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Methyl orange degradationMarked as a best value within this paper	95%	—	—	Table Rounded Reported	6,8-9 · MO degradation · Fig. 11; Table 1; Table 4
Time to reported maximum MO degradationMarked as a best value within this paper	90 min	—	—	Text Rounded Reported	9 · MO degradation · Table 4

Methyl orange degradation reuse and kinetic analysis

M-008b · Powder

Repeated solar-light MO degradation cycles for M-008b; kinetic data fitted to pseudo first and pseudo second order models.

Temperature: room temperature
Geometry: 200 mL glass reactor
Context: reused pristine powder photocatalyst
Measurement source: 8-10 · MO degradation; Kinetic study · Fig. 11c-d; Fig. 12; Table 3

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
MO degradation after five reuse cycles	higher to 80% after 5 cycles	—	>	Text Approximate	9 · MO degradation · Fig. 11c-d
Pseudo second order K2, reuse cycle 1Marked as a best value within this paper	7.0 x 10^-3 g/mg min	—	—	Table Rounded Reported	8 · Table 3 · Table 3
Pseudo second order R2, reuse cycle 1	0.98	—	—	Table Exact Reported	8 · Table 3 · Table 3
Pseudo second order K2, reuse cycle 2	6.0 x 10^-3 g/mg min	—	—	Table Rounded Reported	8 · Table 3 · Table 3
Pseudo second order K2, reuse cycle 3	4.5 x 10^-3 g/mg min	—	—	Table Rounded Reported	8 · Table 3 · Table 3
Pseudo second order K2, reuse cycle 4	4.5 x 10^-3 g/mg min	—	—	Table Rounded Reported	8 · Table 3 · Table 3
Pseudo second order K2, reuse cycle 5	3.1 x 10^-3 g/mg min	—	—	Table Rounded Reported	8 · Table 3 · Table 3
Pseudo second order R2, reuse cycle 5	0.94	—	—	Table Exact Reported	8 · Table 3 · Table 3

Mott-Schottky / potentiodynamic electrochemical impedance

Mott-Schottky analysis

M-008a/Nafion thin film on ITO · Electrode

Flat-band potential from x-axis intercept of linear Mott-Schottky fit; assumed as conduction band.

Geometry: thin film on ITO working electrode
Context: Nafion-bound MOF film on ITO
Measurement source: 5,7 · Electrochemical characterization · Fig. 6b-c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Conduction band / LUMO potential	-0.6 eV vs NHE	—	—	Figure Axis Rounded Reported	5,7 · Electrochemical characterization · Fig. 6c
Semiconductor type from Mott-Schottky slope	n-type semiconductor	—	—	Text Qualitative	7 · Electrochemical characterization · Fig. 6b
Valence band / HOMO potential	3.2 eV vs NHE	—	—	Figure Axis Rounded Reported	5,7 · Electrochemical characterization · Fig. 6c

Mott-Schottky / potentiodynamic electrochemical impedance

Mott-Schottky analysis

M-008b/Nafion thin film on ITO · Electrode

Flat-band potential from x-axis intercept of linear Mott-Schottky fit; assumed as conduction band.

Geometry: thin film on ITO working electrode
Context: Nafion-bound MOF film on ITO
Measurement source: 5,7 · Electrochemical characterization · Fig. 6b-c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Conduction band / LUMO potential	-0.6 eV vs NHE	—	—	Figure Axis Rounded Reported	5,7 · Electrochemical characterization · Fig. 6c
Semiconductor type from Mott-Schottky slope	n-type semiconductor	—	—	Text Qualitative	7 · Electrochemical characterization · Fig. 6b
Valence band / HOMO potential	3.2 eV vs NHE	—	—	Figure Axis Rounded Reported	5,7 · Electrochemical characterization · Fig. 6c

Photocatalytic hydrogen evolution under solar simulator

M-008a · Powder

0.1 g MOF in 200 mL deionized water; room temperature; pH 6; Xe-lamp solar simulator AM 1.5G, 450 W; no sacrificial agent.

Temperature: room temperature
Geometry: 250 mL Pyrex reactor
Context: pristine powder photocatalyst
Measurement source: 2,6,8 · Photocatalytic test; Hydrogen evolution · Fig. 8; Table 1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Hydrogen evolution rate under solar irradiation	10 umol g^-1 h^-1	—	—	Table Rounded Reported	6,8 · Hydrogen evolution · Fig. 8; Table 1

Photocatalytic hydrogen evolution under solar simulator

M-008b · Powder

0.1 g MOF in 200 mL deionized water; room temperature; pH 6; Xe-lamp solar simulator AM 1.5G, 450 W; no sacrificial agent.

Temperature: room temperature
Geometry: 250 mL Pyrex reactor
Context: pristine powder photocatalyst
Measurement source: 2,6,8 · Photocatalytic test; Hydrogen evolution · Fig. 8; Table 1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Hydrogen evolution rate under solar irradiationMarked as a best value within this paper	14 umol g^-1 h^-1	—	—	Table Rounded Reported	6,8 · Hydrogen evolution · Fig. 8; Table 1

Photocatalytic hydrogen evolution under UV light with diethanolamine

M-008a · Powder

0.1 g MOF in 200 mL deionized water; UV 254 nm; 10 vol% diethanolamine sacrificial agent.

Temperature: room temperature
Geometry: 250 mL Pyrex reactor
Context: pristine powder photocatalyst with solution-phase DEA
Measurement source: 2,6,8 · Photocatalytic test; Hydrogen evolution · Fig. 9; Table 1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Hydrogen evolution rate under UV light with 10% DEA	116 umol g^-1 h^-1	—	—	Table Rounded Reported	6,8 · Hydrogen evolution · Fig. 9; Table 1

Photocatalytic hydrogen evolution under UV light with diethanolamine

M-008b · Powder

0.1 g MOF in 200 mL deionized water; UV 254 nm; 10 vol% diethanolamine sacrificial agent.

Temperature: room temperature
Geometry: 250 mL Pyrex reactor
Context: pristine powder photocatalyst with solution-phase DEA
Measurement source: 2,6,8 · Photocatalytic test; Hydrogen evolution · Fig. 9; Table 1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Hydrogen evolution rate under UV light with 10% DEAMarked as a best value within this paper	225 umol g^-1 h^-1	—	—	Table Rounded Reported	6,8 · Hydrogen evolution · Fig. 9; Table 1

Photocatalytic hydrogen evolution under UV light

M-008a · Powder

0.1 g MOF in 200 mL deionized water; Pyrex reactor; room temperature; pH 6; UVP pen-ray lamp 254 nm, 4400 uW cm^-2; no sacrificial agent.

Temperature: room temperature
Geometry: 250 mL Pyrex reactor
Context: pristine powder photocatalyst
Measurement source: 2,6,8 · Photocatalytic test; Hydrogen evolution · Fig. 7; Table 1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Hydrogen evolution rate under UV light without sacrificial agent	53 umol g^-1 h^-1	—	—	Table Rounded Reported	6,8 · Hydrogen evolution · Fig. 7; Table 1

Photocatalytic hydrogen evolution under UV light

M-008b · Powder

0.1 g MOF in 200 mL deionized water; Pyrex reactor; room temperature; pH 6; UVP pen-ray lamp 254 nm, 4400 uW cm^-2; no sacrificial agent.

Temperature: room temperature
Geometry: 250 mL Pyrex reactor
Context: pristine powder photocatalyst
Measurement source: 2,6,8 · Photocatalytic test; Hydrogen evolution · Fig. 7; Table 1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Hydrogen evolution rate under UV light without sacrificial agentMarked as a best value within this paper	103 umol g^-1 h^-1	—	—	Table Rounded Reported	6,8 · Hydrogen evolution · Fig. 7; Table 1