Water treatment compositions and uses

By controlling the inert gas flow rate during pyrolysis, modified graphitic carbon nitride with high crystallinity and low defect density was prepared. This modified carbon nitride was then combined with monochloramine and selenite to form a water treatment composition, which solved the problem of insufficient crystallinity and defect density of the modified graphitic carbon nitride catalyst and achieved efficient and stable degradation of organic pollutants.

CN121892192BActive Publication Date: 2026-06-19SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN UNIV
Filing Date
2026-03-25
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing technologies for modifying graphitic carbon nitride catalysts have limited modification targets, insufficient attention to crystallinity and chemical defect density, unclear synergistic catalytic mechanisms, and poor long-term effectiveness, resulting in low catalytic efficiency and insufficient stability.

Method used

By controlling the low flow rate (<5 L/h) of inert gas during pyrolysis, modified graphitic carbon nitride with high crystallinity and low defect density was prepared, and then combined with monochloramine and selenite to form a water treatment composition, achieving efficient synergistic catalysis.

Benefits of technology

It improves the crystallinity and stability of the material, enhances its ability to degrade various organic pollutants, and demonstrates broad applicability and long-lasting catalytic performance.

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Abstract

This invention belongs to the field of water treatment technology and discloses a water treatment composition and its applications. The water treatment composition includes: modified graphitic carbon nitride with high crystallinity and low defect density, and monochloramine. This invention abandons the conventional approach of simply pursuing high specific surface area, and innovatively prepares modified graphitic carbon nitride with high crystallinity and low defect density by controlling the low flow rate of inert gas during pyrolysis. This highly ordered crystal structure and pure chemical framework bring about a breakthrough in intrinsic photoelectric properties. Experiments have demonstrated that the contribution of increased crystallinity to performance is far greater than that of simply increasing specific surface area. Thanks to the structural stability brought about by high crystallinity, the modified graphitic carbon nitride of this invention can maintain high catalytic activity during recycling. Simultaneously, this water treatment composition exhibits efficient degradation capabilities for various types of typical organic pollutants, demonstrating good broad applicability and broad practical application prospects.
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