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(A) CV analysis of unmodified SPCE (a), Bi2S3 NPs/SPCE (b), GCN/SPCE (c), Bi2S3@GCN hybrid (d). (B) Anti-fouling ability of Bi2S3@GCN/SPCE and its corresponding calibration plot (inset). (C) Different scan rate analysis (20 mV/s to 300 mVs) of Bi2S3@GCN/SPCE and corresponding calibration plot (D).
