Fig. 3: VP’s catalytic efficacy to generate ·O2− and ·OH. | Nature Communications

Fig. 3: VP’s catalytic efficacy to generate ·O2− and ·OH.

From: Catalytic activity of violet phosphorus-based nanosystems and the role of metabolites in tumor therapy

Fig. 3

VPQDs-mediated DPBF decrease in (a) the oxygenated condition and (b) the H2O2-sufficient condition at different pH. Data in (b) are presented as the mean with SD (n = 3 independent samples). Statistical differences were analyzed by a two-way ANOVA with Tukey’s multiple comparisons test. The PBS groups were control groups. ESR results of VPQDs in (c) the oxygenated condition and (d) the H2O2-sufficient condition. e UV-vis diffuse reflection spectrum (DRS) of lyophilized VPQDs powder. Insert: corresponding Tauc plot of DRS plot according to Kubelka-Munk formula: (F(R)hν)2 = k/s = (1-R)2/2 R = B(hν-Eg), where (F(R)hν)2 as y axis, hν as x axis. f Valence band spectra of lyophilized VPQDs powder. g Simplified band structure vs. NHE of VPQDs. h Calculated ΔG of VP-mediated ·O2− generation. i Charge density difference profiles for the adsorption of O2 molecule on VP. Smooth yellow and blue shading illustrate the charge-accumulation and charge-depletion, respectively. j Calculated ΔG of VP-mediated ·OH generation. k Charge density difference profiles for the adsorption of H2O2 molecule on VP. Smooth yellow and blue shading illustrate the charge-accumulation and charge-depletion, respectively.

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