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9 pages, 3582 KB

Open AccessProceeding Paper

Investigation of New Additive Manufacturing DED Application for Waste-to-Hydrogen Conversion

by Svetlana Boshnakova

Chem. Proc. 2026, 20(1), 1; https://doi.org/10.3390/chemproc2026020001 - 27 Jul 2026

Cited by 1 | Viewed by 285

Abstract

Relatively low-cost titanium carbide (TiC) materials and metal matrix composites (MMC) are proposed for waste-to-hydrogen conversion. Two types of steels are used as bases prepared from EN 10088 flat products, namely X2CrTi12 (1.4512, AISI 409) and X5CrNi18-10 (1.4301, AISI 304). TiC is mixed with TRIBALOY^® T-800 alloy in powder form and applied via laser-directed energy deposition (DED-LB) over the substrates. For the powder mixture, Fourier transform infrared spectroscopy (FT-IR) and differential scanning calorimetry (DSC) are performed. The raw materials are investigated for the processes that occur in them under heating. After the solidification of the molten mixture, grinding and polishing are performed to achieve a thin layer. The studies of the obtained MMC include interface zone assessment, hardness and Young’s modulus distribution, microstructural analysis, and visual defect evaluation. Advanced sensors for acoustic emission (AE) and Electrical Contact Resistance (ECR) provided characterization together with micro-scratch testing. The use of photoluminescence spectroscopy is proposed for the new composite materials. The electron transfer pathway can be studied with time-resolved spectroscopy. Renewable energy production by breaking down waste into hydrogen-rich syngas can be achieved through pyrolysis, followed by steam reforming and purification. The obtained novel materials show promising application solutions with increased durability, corrosion, and wear resistance. Full article

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12 pages, 4714 KB

Open AccessProceeding Paper

Effect of Color on the Catalytic Performance of Cotton-Bound Photocatalysts

by Isabella Goveia, Verona Peterman, Genevieve Huynh and Rohit Bhide

Chem. Proc. 2026, 20(1), 2; https://doi.org/10.3390/chemproc2026020002 - 30 Jul 2026

Viewed by 518

Abstract

There is an urgent and persistent need to design efficient and sustainable methods to manufacture chemicals on a large scale. Heterogeneous photocatalysts use light to drive organic reactions and offer high recyclability and improved efficiencies for chemical synthesis. However, a detailed study of these photocatalysts using standard laboratory analytical techniques is challenging due to their poor solubility. Successful application of heterogeneous photocatalysts in the chemical industry requires the development of a robust analytical technique that can be used as a predictive and scalable tool for their photocatalytic performance. Herein, we report a simple approach that uses the color of cotton-bound heterogeneous photocatalysts as a potential indicator of their performance. These photocatalysts were synthesized by covalently attaching perylene-based molecular photocatalysts to the surface of cotton using amino-substituted triethoxysilane as the linker. Colorimetry coupled with NMR analysis revealed two important findings: (i) cotton-bound photocatalysts catalyzed sulfide oxidation to sulfoxide under blue-light illumination, and (ii) a general relationship was observed between color intensity and catalytic performance, with darker samples generally exhibiting faster reaction rates. These findings suggest that color may serve as a simple and rapid tool for assessing photocatalyst performance. Future studies will focus on enhancing the reproducibility of photocatalyst binding procedures and validating the color–performance relationships in a wider range of color intensities of the cotton-bound photocatalysts. Full article

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7 pages, 2648 KB

Open AccessProceeding Paper

Position-Dependent Epoxidation as a Strategy to Tune Optical Transitions in Nanographenes: Coronene Model Insights

by Dmitry Romanov, Anatoly Lavrentyev and Igor Ershov

Chem. Proc. 2026, 20(1), 3; https://doi.org/10.3390/chemproc2026020003 - 4 Sep 2026

Viewed by 166

Abstract

This study investigated the influence of position-dependent edge epoxidation on the electronic and optical properties of nanographenes, using coronene as a model system. Quantum-chemical calculations were employed to examine how local functionalization alters the carbon framework and the nature of π-conjugation, thereby influencing the distribution of frontier molecular orbitals. It was established that the position of the epoxy group determines the nature of the changes within the π-system and the resulting optical response of the functionalized coronene. These structural and electronic modifications are accompanied by variations in the spectral characteristics and the transition probabilities of low-energy electronic transitions. The obtained results demonstrate the interplay between the functional group position, electronic structure, and optical properties of nanographenes, providing a foundation for the rational tuning of their optical response. Full article

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