Using photoelectrochemical (PEC) platform for ultrasensitive detection of sulfate-reducing bacteria (SRB) is a big challenge since sensor sensitive component can be damaged by corrosive metabolites. In this work, a novel bio-etching strategy for sensitizing PEC platform is developed to detect SRB. In the presence of bacterial metabolite (H₂S), BiOCl platform can be bio-etched to form Bi₂S₃/BiOCl p-n heterojunction, leading to a significant enhancement of photocurrent. The PEC sensing platform fabricated by bio-etching strategy presents acceptable detection specificity and high detection sensitivity with a low detection limit of 29 cfu/mL for SRB. The current work can provide new strategies to sensitize PEC platforms for detection of microorganisms that produce corrosive metabolite.

使用光电化学（PEC）平台进行硫酸盐还原细菌（SRB）的超灵敏检测是一个巨大的挑战，因为传感器的敏感成分可能会被腐蚀性代谢产物破坏。在这项工作中，开发了一种新型的生物蚀刻策略来增敏PEC平台以检测SRB。在存在细菌代谢物（H ₂ S）的情况下，可以对BiOCl平台进行生物蚀刻以形成Bi ₂ S ₃ / BiOCl pn异质结，导致光电流显着增强。通过生物蚀刻策略制造的PEC传感平台具有可接受的检测特异性和高检测灵敏度，对SRB的检测限低至29 cfu / mL。当前的工作可以提供新的策略，以增强PEC平台的检测能力，以检测产生腐蚀性代谢产物的微生物。