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<p>Ensuring water quality is crucial for environmental monitoring, necessitating affordable, user-friendly, stable, and highly sensitive analytical sensors due to increased water pollution. Nanomaterials, particularly gold nanoparticles (AuNPs), are favored for sensor development due to their unique properties. Stable and sensitive AuNPs were synthesized using a novel method involving pre-bonded Ascorbic Acid (AA) and Sodium Borohydride (BH). These AuNPs, with an average diameter of 16–20&#xa0;nm and a λmax of 518&#xa0;nm, demonstrated excellent sensitivity for metals in UV-visible spectrophotometry and visual color change. Real-time water quality tests using only 100&#xa0;µl of AuNPs and 10–20&#xa0;µl of water sample yielded results within 5&#xa0;s, even for highly contaminated samples. This cost-effective synthesis approach highlights the potential of AuNPs in various water quality monitoring applications, including assessing total dissolved substances (TDS) and measuring water pollution levels.</p>

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Ascorbic acid - Sodium Borohydride coupled supersensitive gold nanoparticles for water quality assurance

  • 期刊论文

  • 发表日期：

    2025年2月3日

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  • Pradeepa,
  • Rashmi Kanugodu Vasappa,
  • Darshini Shivamogga Mohan,
  • Manjunatha Bukkambudhi Krishnaswamy,
  • Anil Kumar Honnali Srinivasalu,
  • Venkatesh Kamath Halladi,
  • Ganga Gamana,
  • Vidya Shimoga Muddappa

摘要

Ensuring water quality is crucial for environmental monitoring, necessitating affordable, user-friendly, stable, and highly sensitive analytical sensors due to increased water pollution. Nanomaterials, particularly gold nanoparticles (AuNPs), are favored for sensor development due to their unique properties. Stable and sensitive AuNPs were synthesized using a novel method involving pre-bonded Ascorbic Acid (AA) and Sodium Borohydride (BH). These AuNPs, with an average diameter of 16–20 nm and a λmax of 518 nm, demonstrated excellent sensitivity for metals in UV-visible spectrophotometry and visual color change. Real-time water quality tests using only 100 µl of AuNPs and 10–20 µl of water sample yielded results within 5 s, even for highly contaminated samples. This cost-effective synthesis approach highlights the potential of AuNPs in various water quality monitoring applications, including assessing total dissolved substances (TDS) and measuring water pollution levels.