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In this study, the novel functional ligand was synthesized and then successfully immobilized onto the inorganic silica for the fabrication of solid-state sensor for simultaneous detection and adsorption of cadmium (Cd(II)) ion from water samples. The fabricated sensor was formed optical colour upon addition of trace amount of Cd(II) ion at experimental conditions. Several experimental parameters such as sensor morphology, solution pH, colour optimization, detection limit, competing ions effect, desorption and maximum adsorption capacity was evaluated. The data clarified that the materials could detect the ultra-trace level of Cd(II) ion according to the limit of detection was 0.88 µg/L based on the false positives and false negatives with the propagation of uncertainties. The solution pH was exhibited the key role, and the suitable pH 7.0 were selected based on the signal intensity and adsorption efficiency. The …