A novel multielement-doped carbon dots (ME-CDs) were synthesized by simply hydrothermal treatment of animal blood. Results revealed that the prepared carbon dots were mainly constituted of carbon, oxygen and nitrogen elements with trace amount of iron and sulfur elements, illustrating strong fluorescence with a quantum yield of 32.6%. The as-prepared carbon dots displayed excellent peroxidase-like catalytic activities attributed to the doped iron elements in the ME-CDs. The nanodots could be utilized to fabricate a colorimetric sensor for glucose detection and demonstrated good sensitivity and specificity. This work provides a facile strategy for the synthesis of catalytically active carbon dots and building of colorimetric sensor.

通过对动物血液进行简单的水热处理，合成了一种新型的多元素掺杂碳点（ME-CD）。结果表明，制备的碳点主要由碳，氧和氮元素组成，痕量的铁和硫元素，显示出强荧光，量子产率为32.6％。所制备的碳点显示出优异的过氧化物酶样催化活性，这归因于ME-CD中的掺杂铁元素。纳米点可用于制造用于葡萄糖检测的比色传感器，并表现出良好的灵敏度和特异性。这项工作为催化活性碳点的合成和比色传感器的建立提供了一种简便的策略。