Wang G., Zhou X., Qin J. et al. · ACS Applied Materials and Interfaces · 2019 · 35060-35067
Open a family to keep every result attached to its sample, method and conditions.
Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.
The quinary MOHS ethanol response changes little across about 40-90% relative humidity.
Caveat: Humidity measurements are reported for 50 ppm ethanol; other analyte concentrations are not covered.
S-22 · Figure S18 · Figure S18 · Linked to 3 structured results
Quinary MOHS sensors provide low-temperature ethanol sensing with 10.91 response at 80 C, 85/160 s response/recovery time, selectivity over several interfering gases, and detectable response at 25 C.
Caveat: Application was demonstrated on a laboratory MA1.0 gas sensing system; raw device-to-device statistics are limited in the extracted text.
p006 / 35065 · Conclusions · Figure 4; Figure S16 · Linked to 5 structured results
The quinary Ni-Co-Fe-Cu-Zn MOHSs are described as an unusual high-entropy metal oxide family because all five metal elements exceed 10 at.% and the oxide shows a pure fcc crystalline phase.
Caveat: Entropy stabilisation itself is inferred; the paper reports composition and phase rather than thermodynamic entropy measurements.
p005 / 35064 · Results and discussion · Figure 3 · Linked to 6 structured results
The enhanced low-temperature sensing is mainly attributed to the multishell mesoporous structure and synergistic contributions from multiple oxide components and variable valence states.
Caveat: The authors state the low-temperature sensing mechanism remains unclear and more complicated than unitary oxides.
p006 / 35065 · Results and discussion · Linked to 6 structured results
Tannic-acid MPCPs provide a general self-template route to binary, ternary and quinary mixed metal oxide hollow spheres by calcination.
Caveat: The coordination polymers are amorphous and not crystalline conductive MOFs.
p006 / 35065 · Conclusions · Linked to 2 structured results
The multishell hollow structure forms through heterogeneous contraction of the metal-phenolic coordination polymer during air calcination.
Caveat: Mechanism is proposed from temperature-dependent microscopy rather than directly time-resolved.
p005 / 35064 · Results and discussion · Figure 2m · Linked to 1 structured result
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Fe-Co mixed metal oxide hollow spheres | Fe-Co oxides; Fe-Co-TA-400Fe and Co oxide domains; XRD similar to CoFe2O4 · none after calcination; derived from Fe-Co-TA | 0D · DerivedMultishell hollow metal oxide spheres with crystalline mesoporous framework. | p003 / 35062 · Results and discussion · Figure 1b-d; Figure S3 |
| Metal-phenolic coordination polymer precursors (MPCPs) | Variable M-TA coordination polymers: Fe-Co-TA, Ni-Co-TA, Ni-Zn-TA, Ni-Co-Mn-TA, Ni-Co-Zn-TA, Ni-Co-Fe-Cu-Zn-TAFe, Co, Ni, Zn, Mn and/or Cu ions coordinated by tannic acid catechol/galloyl groups · Tannic acid (TA); formaldehyde-assisted crosslinked metal-phenolic network | unknown · PristineAmorphous metal-phenolic coordination polymers used as self-templates and metal oxide precursors. | p002 / 35061 · Introduction · Figure 1a |
| Ni-Co-Fe-Cu-Zn quinary mixed metal oxide hollow spheres | Ni-Co-Fe-Cu-Zn oxides; Ni-Co-Fe-Cu-Zn-TA-400Ni, Co, Fe, Cu and Zn oxide domains; high-entropy-like fcc mixed oxide · none after calcination; derived from Ni-Co-Fe-Cu-Zn-TA | 0D · DerivedMultishell hollow quinary metal oxide spheres with pure fcc crystalline phase, mesoporous framework and uniform element distribution. | p004 / 35063 · Results and discussion · Figures 2 and 3 |
| Ni-Co-Mn ternary metal oxide hollow spheres | Ni-Co-Mn oxides; Ni-Co-Mn-TA-400Ni, Co and Mn oxide domains · none after calcination; derived from Ni-Co-Mn-TA | 0D · DerivedTernary multishell hollow spheres with crystalline mesoporous framework. | p003 / 35062 · Results and discussion · Figure 1e-g; Figures S8-S10 |
| Ni-Co mixed metal oxide hollow spheres | Ni-Co oxides; Ni-Co-TA-400Ni and Co oxide domains; XRD assigned to crystalline NiCo2O4 · none after calcination; derived from Ni-Co-TA | 0D · DerivedBinary hollow spheres with crystalline framework and uniform Ni/Co distribution. | S-8 to S-10 · Figures S4 and S6 · Figures S4, S6 |
| Ni-Co-Zn ternary metal oxide hollow spheres | Ni-Co-Zn oxides; Ni-Co-Zn-TA-400Ni, Co and Zn oxide domains · none after calcination; derived from Ni-Co-Zn-TA | 0D · DerivedTernary multishell hollow spheres with crystalline mesoporous framework. | S-15 · Figure S11 · Figure S11 |
| Ni-Zn mixed metal oxide hollow spheres | Ni-Zn oxides; Ni-Zn-TA-400NiO and ZnO phases · none after calcination; derived from Ni-Zn-TA | 0D · DerivedBinary hollow spheres with mixed crystalline NiO/ZnO phase and uniform Ni/Zn distribution. | S-9 to S-10 · Figures S5 and S6 · Figures S5, S6 |
| Unitary metal oxide nanoparticle sensing controls | ZnO, NiO, Co3O4, CuO and Fe2O3single-metal oxide controls · none after calcination | 0D · DerivedControl metal oxide nanoparticles used for comparison with the quinary MOHS sensor. | p006 / 35065 · Results and discussion · Figure 4d |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Fe-Co-TA MPCP precursorresearch_0834__mat__mpcp_precursors | Powder · Target Sample · Pristine Framework | As-synthesized metal-phenolic coordination polymer collected by centrifugation, washing and drying.none | S-1 to S-2 · 1.2 Synthesis of metal-phenolic coordination polymers · Figure S1 |
| Fe-Co-TA-400research_0834__mat__fe_co_mohs | Powder · Target Sample · Mixed Metal | Fe-Co-TA calcined directly in air at 400 C for 2 h.none | p003 / 35062 · Results and discussion · Figure 1b-d |
| Ni-Co-Fe-Cu-Zn-TA quinary MPCP precursorresearch_0834__mat__mpcp_precursors | Powder · Target Sample · Pristine Framework | As-synthesized quinary metal-phenolic coordination polymer.none | p004 / 35063 · Results and discussion · Figure 2i; Figure S1f,i |
| Ni-Co-Fe-Cu-Zn-TA-300research_0834__mat__ni_co_fe_cu_zn_mohs | Powder · Target Sample · Mixed Metal | Quinary MPCP calcined in air at 300 C.none | p005 / 35064 · Results and discussion · Figure 2j,k |
| Ni-Co-Fe-Cu-Zn-TA-350research_0834__mat__ni_co_fe_cu_zn_mohs | Powder · Target Sample · Mixed Metal | Quinary MPCP calcined in air at 350 C.none | p005 / 35064 · Results and discussion · Figure 2l |
| Ni-Co-Fe-Cu-Zn-TA-400research_0834__mat__ni_co_fe_cu_zn_mohs | Powder · Target Sample · Mixed Metal | Quinary MPCP calcined directly in air at 400 C for 2 h.none | p004 / 35063 · Results and discussion · Figures 2 and 3 |
| Ni-Co-Fe-Cu-Zn-TA-450research_0834__mat__ni_co_fe_cu_zn_mohs | Powder · Target Sample · Mixed Metal | Quinary MPCP calcined in air at 450 C.none | p005 / 35064 · Results and discussion · Figure S13c |
| Ni-Co-Mn-TA-400research_0834__mat__ni_co_mn_mohs | Powder · Target Sample · Mixed Metal | Ni-Co-Mn-TA calcined directly in air at 400 C for 2 h.none | p003 / 35062 · Results and discussion · Figure 1e-g |
| Ni-Co-TA-400research_0834__mat__ni_co_mohs | Powder · Target Sample · Mixed Metal | Ni-Co-TA calcined directly in air at 400 C for 2 h.none | S-8 · Figure S4 · Figure S4 |
| Ni-Co-Zn-TA-400research_0834__mat__ni_co_zn_mohs | Powder · Target Sample · Mixed Metal | Ni-Co-Zn-TA calcined directly in air at 400 C for 2 h.none | S-15 · Figure S11 · Figure S11 |
| Ni-Zn-TA-400research_0834__mat__ni_zn_mohs | Powder · Target Sample · Mixed Metal | Ni-Zn-TA calcined directly in air at 400 C for 2 h.none | S-9 · Figure S5 · Figure S5 |
| Quinary MOHS alumina-tube chemiresistive sensorresearch_0834__mat__ni_co_fe_cu_zn_mohs | Electrode · Target Sample · Mixed Metal | Nanoparticle ethanol paste coated on alumina tube, dried, calcined at 300 C for 1 h, then aged at 100 C for 5 days.alumina tube with Au electrodes; Ni-Cr alloy heater wire | S-3 · 1.5 Gas sensing performance · Figure S14 |
| Unitary metal oxide control sensorsresearch_0834__mat__unitary_oxide_controls | Electrode · Pristine Control · Unknown | Unitary metal oxide nanoparticles used as sensing materials; detailed preparation not reported in the supplied text.not specified; compared as gas-sensing material | p006 / 35065 · Results and discussion · Figure 4d |