A novel photothermal approach has been developed for the detection of sulfide ions(S).This sensor capitalizes on the introduction of S2-to expedite the transformation of cuprous oxide(Cu2O)into copper sulfide(CuS),thereby augmenting the photothermal effect of the probe.This enhancement enables the quantitative analysis of S with remarkable selectivity,achieved through a distinctive"turn-on"photothermal signal.Furthermore,the method incorporates the utilization of a portable infrared camera for signal reading,offering advantages such as cost-effectiveness,rapid detection,and straightforward operation.These features collectively position this approach as a promising solution for on-site monitoring of S levels in environmental water samples.
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