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Multifunctional green pigment with UV protection based on capping agent-engineered Cr-doped hydroxyapatite
Natalya Kolokolova1, Evgeniya Syukkalova1, Lusine Voskanyan1
1Saint Petersburg State University, 7/9 Universitetskaya Embankment, Saint Petersburg, 199034, Russian Federation. dmitry.tka12@gmail.com.
Nanoscale
|April 20, 2026
Summary
Researchers developed novel chromium-doped hydroxyapatite (Cr-HAp) nanoparticles for eco-friendly BB creams. These advanced nanoparticles offer stable green pigments and effective UV protection, addressing limitations of current cosmetic ingredients.
Area of Science:
- Materials Science
- Cosmetic Science
- Nanotechnology
Background:
- Conventional UV filters and pigments in BB creams face challenges like poor photostability, environmental toxicity, and skin penetration.
- There is a need for advanced cosmetic ingredients that offer enhanced performance and improved safety profiles.
Purpose of the Study:
- To develop chromium-doped hydroxyapatite (Cr-HAp) nanoparticles as multifunctional cosmetic ingredients.
- To address limitations of conventional UV filters and pigments by creating stable, non-toxic alternatives.
- To evaluate the performance of modified Cr-HAp nanoparticles in a prototype BB cream formulation.
Main Methods:
- Synthesized Cr-HAp nanoparticles via co-precipitation and hydrothermal treatment.
- Modified nanoparticles using succinic, tartaric, and etidronic acids to control morphology and surface properties.
- Characterized nanoparticles using XRD, FTIR, TEM, and XPS.
- Incorporated modified Cr-HAp nanoparticles into a BB cream prototype.
Main Results:
- Achieved controlled nanoparticle morphology (rods to needles) through organic acid modification and oriented attachment.
- Developed stable green pigments with tunable CIELab color coordinates and lightness.
- Demonstrated effective UV protection, particularly UVB absorption, modulated by synthesis conditions.
- Prototype BB cream showed successful integration of Cr-HAp nanoparticles for UV shielding and color correction.
Conclusions:
- Modified Cr-HAp nanoparticles are suitable multifunctional cosmetic ingredients.
- These nanoparticles offer a sustainable alternative to conventional UV filters and pigments.
- The developed nanoparticles provide UV protection, color correction, and align with environmentally conscious formulation design.
