Electrochemistry Application — Dual single atomic Fe-Ni sites in N‑doped nanoporous carbon for high-efficiency potassium periodate activation toward pollutant abatement

6 measurement groups · 25 results

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

Chemical oxygen demand (COD)

Fe2Ni1-NC-900 · Powder

COD determined by HACH digestion instrument and UV-vis spectrophotometer after Fe2Ni1-NC-900/PI oxidation.

Geometry: aqueous treated solution
Context: MOF-derived catalyst powder in PI system
Measurement source: 10; SI 9 · 3.7 Evolution mechanism · Figure S8

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
COD removal efficiency	52.3 %	52.3 %	—	Text Exact Reported	10 · 3.7 · Figure S8

Recycling and regeneration catalytic tests

Used Fe2Ni1-NC-900 · Powder

Recovered catalyst washed with ethanol and water, dried at 60 deg C, reused; annealing regeneration at 900 deg C in N2 for 2 h.

Temperature: 298
Atmosphere: reaction in water; annealing in N2
Geometry: batch reactor
Context: used and regenerated MOF-derived catalyst powder
Measurement source: 4; 7-8 · 2.2; 3.4 · Figure 4e

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Orange II removal after annealing regeneration	89 % after annealing treatment	89 %	—	Text Rounded Reported	8 · 3.4 · Figure 4e
Orange II removal after three repetitions	decreased from 100.0 % to 62.0 % after three repetitions	62 %	—	Text Exact Reported	7-8 · 3.4 · Figure 4e

Continuous-flow fixed-bed oxidation

Fe2Ni1-NC-900 · Powder

Continuous fixed-bed apparatus with 0.5 g Fe2Ni1-NC-900; Orange II inflow concentration 50 mg/L.

Geometry: continuous fixed-bed apparatus
Context: MOF-derived catalyst powder packed for continuous flow
Measurement source: 7-8 · 3.4 Durability and practical application · Figure 4f

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Continuous-flow removal efficiencyMarked as a best value within this paper	100 % removal efficiency	100 %	—	Text Exact Reported	8 · 3.4 · Figure 4f
Orange II-contaminated water treated in continuous flow	8 L	8 L	—	Text Exact Reported	8 · 3.4 · Figure 4f

Batch catalytic oxidation of Orange II by periodate activation

Fe2Ni1-NC-900 · Powder

200 mL reactor with 300 rpm stirring, 25 +/- 1 deg C; standard Figure 3 parameters: catalyst 0.05 g/L, PI 0.05 g/L, organic 30 mg/L, no pH adjustment.

Temperature: 298
Geometry: batch reactor
Context: MOF-derived catalyst powder in aqueous pollutant oxidation
Measurement source: 2-3; 5-6 · 2.2; 3.2 · Figure 3

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Orange II elimination by Fe2Ni1-NC-900 adsorption only	41.3 % within 50 min after adding Fe2Ni1-NC-900	41.3 %	approximately	Text Approximate	5 · 3.2 · Figure S3a
Orange II removal by Fe1Ni1-NC-900/PI	93 %	93 %	—	Text Rounded Reported	5 · 3.2 · Figure 3c
Orange II removal by Fe1Ni2-NC-900/PI	82 %	82 %	—	Text Rounded Reported	5 · 3.2 · Figure 3c
Orange II removal by Fe2Ni1-NC-1000/PI	91 %	91 %	—	Text Rounded Reported	5-6 · 3.2 · Figure 3d
Orange II removal by Fe2Ni1-NC-800/PI	65 %	65 %	—	Text Rounded Reported	5-6 · 3.2 · Figure 3d
Orange II removal by Fe2Ni1-NC-900/PIMarked as a best value within this paper	100.0 %	100 %	—	Text Exact Reported	5-6 · 3.2 · Figure 3d
Orange II removal by Fe2Ni1-NC-950/PI	86 %	86 %	—	Text Rounded Reported	5-6 · 3.2 · Figure 3d
Orange II oxidation by Fe2Ni1-NC-900/PIMarked as a best value within this paper	completely oxidized in 50 min	100 %	—	Text Rounded Reported	5 · 3.2 · Figure 3a
Orange II removal by Fe4Ni1-NC-900/PI	84 %	84 %	—	Text Rounded Reported	5 · 3.2 · Figure 3c
Orange II removal by Fe-NC-900/PI	91 %	91 %	—	Text Rounded Reported	5 · 3.2 · Figure 3c
Orange II removal by NC-900/PI	28 %	28 %	—	Text Rounded Reported	5 · 3.2 · Figure 3c
Orange II removal by Ni-NC-900/PI	43 %	43 %	—	Text Rounded Reported	5 · 3.2 · Figure 3c

Radical scavenging and EPR spectroscopy

Electron paramagnetic resonance

Fe2Ni1-NC-900 · Powder

TBA, MeOH, EtOH, p-BQ, L-histidine and DMSO scavengers; EPR with DMPO for radicals and TEMP for singlet oxygen.

Temperature: 298
Atmosphere: air or N2-saturated tests as noted
Geometry: aqueous catalytic reaction
Context: MOF-derived catalyst powder
Measurement source: 3; 8-9 · 2.2; 3.5 · Figure 5; Figure S6

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
DMSO high-valent Fe/Ni-oxo scavenging result	0.01 mM DMSO did not reduce Orange II removal efficiency	0.01 mM	—	Text Exact Reported	9 · 3.5 · Figure 5a
Orange II degradation with excess L-histidine	remained at 45 %	45 %	—	Text Rounded Reported	9 · 3.5 · Figure S6e
Orange II degradation with 0.5 mM L-histidine	decreased from 100 % to 51 %	51 %	—	Text Rounded Reported	9 · 3.5 · Figure S6e
TEMP-EPR evidence for singlet oxygen	characteristic three-peak signal (1:1:1) appeared when Fe2Ni1-NC-900 and PI were added together	—	—	Qualitative Qualitative	9 · 3.5 · Figure 5d

Zeta potential and pH-dependent oxidation

Dynamic light scattering and zeta potential

Fe2Ni1-NC-900 · Powder

Malvern Zetasizer Nano ZS90 for zeta potential; Orange II oxidation measured at initial pH 2.03-9.01.

Temperature: 298
Geometry: aqueous dispersion
Context: MOF-derived catalyst powder
Measurement source: 6-7 · 3.3 Influencing factors · Figure 4a-b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Orange II oxidation efficiency in 5.0 mM carbonate	64.0 %	64 %	—	Text Exact Reported	7 · 3.3 · Figure 4c
Isoelectric point pHpzc of Fe2Ni1-NC-900	about 2.53	2.53 pH	about	Text Approximate	6 · 3.3 · Figure 4b
Orange II removal in river water	68 % Orange II elimination	68 %	—	Text Rounded Reported	7 · 3.3 · Figure 4d
Orange II removal in tap water	89 % removal efficiency within 50 min	89 %	—	Text Rounded Reported	7 · 3.3 · Figure 4d