What does this research mean for the field?

Intensive mixing of elemental copper and sulfur powders without external heating or mechanical impact can ignite a mixing-induced self-propagating reaction (MXSR) to rapidly and scalably synthesize nanocrystalline copper sulfide. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.ESTABLISHES_NEW_DIRECTION.

What question did this study set out to answer?

Investigate whether ball-free, intensive agitation of elemental copper and sulfur can trigger a self-propagating combustive reaction to rapidly yield nanocrystalline copper sulfide.

September 5, 2026ACS Sustainable Chemistry & Engineering

Rapid, Sustainable, and Scalable Synthesis of Nanocrystalline Copper Sulfide via Intensive Mixing of Elements

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Authors

MBMatěj Baláž PJPatrik Jacko MBMatej Bereš

Discussion

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Overview

Experimental study demonstrates mixing-induced self-propagating reactions for copper sulfide synthesis, highlighting a contamination-free pathway for scalable green mechanochemistry.

Key Points

Investigate whether ball-free, intensive agitation of elemental copper and sulfur can trigger a self-propagating combustive reaction to rapidly yield nanocrystalline copper sulfide.
Agitated elemental copper and sulfur powders in ball-free planetary and mixer mill jars without external heating or impact media, tracking reaction ignition via in situ temperature monitoring.
Mapped ignition boundaries across jar filling fractions, rotational speeds, and Cu:S molar ratios, testing batch scalability up to 62.5 g.
Mixing ignited a self-propagating reaction that yielded nanocrystalline covellite and digenite in under 2 minutes under defined thresholds: jar filling ≥40%, speed ≥700 rpm, and Cu:S molar ratio of 0.625–1.00.
Scalability reached 40 g in a planetary mill and 62.5 g in a mixer mill, achieving 100% atom economy with reaction mass efficiencies of 91% and 88%, respectively.
Operating below ignition thresholds induced only a slow, partial reaction forming unreacted sulfur and digenite that transformed into covellite over time.

Cite This Study

Baláž et al. (2026) studied this question.

synapsesocial.com/papers/6a9bd48c6b95aff0620ec4d7 https://doi.org/10.1021/acssuschemeng.6c03419

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September 5, 2026ACS Sustainable Chemistry & Engineering

Rapid, Sustainable, and Scalable Synthesis of Nanocrystalline Copper Sulfide via Intensive Mixing of Elements

View Full Paper

Ask AI

Bookmark

Authors

MBMatěj Baláž PJPatrik Jacko MBMatej Bereš

Discussion

Member takes

Overview

Experimental study demonstrates mixing-induced self-propagating reactions for copper sulfide synthesis, highlighting a contamination-free pathway for scalable green mechanochemistry.

Key Points

Investigate whether ball-free, intensive agitation of elemental copper and sulfur can trigger a self-propagating combustive reaction to rapidly yield nanocrystalline copper sulfide.
Agitated elemental copper and sulfur powders in ball-free planetary and mixer mill jars without external heating or impact media, tracking reaction ignition via in situ temperature monitoring.
Mapped ignition boundaries across jar filling fractions, rotational speeds, and Cu:S molar ratios, testing batch scalability up to 62.5 g.
Mixing ignited a self-propagating reaction that yielded nanocrystalline covellite and digenite in under 2 minutes under defined thresholds: jar filling ≥40%, speed ≥700 rpm, and Cu:S molar ratio of 0.625–1.00.
Scalability reached 40 g in a planetary mill and 62.5 g in a mixer mill, achieving 100% atom economy with reaction mass efficiencies of 91% and 88%, respectively.
Operating below ignition thresholds induced only a slow, partial reaction forming unreacted sulfur and digenite that transformed into covellite over time.

Cite This Study

Baláž et al. (2026) studied this question.

synapsesocial.com/papers/6a9bd48c6b95aff0620ec4d7 https://doi.org/10.1021/acssuschemeng.6c03419

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