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Updated: Jul 15, 2026
Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
Published on: October 5, 2019
An enhanced photoelectrochemical sensor based on CuBi2O4/HOF-101 heterojunction for highly sensitive detection of
Muyun Zhao1, Wangui Peng2, Weihong Huang1,3
1School of Emergency Management, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China.
Abstract:
A type-II heterojunction was constructed by integrating p‑type CuBi2O4 with n‑type HOF‑101 to enhance charge separation and transport. The resulting heterostructure generated a photocurrent response of 650 nA, more than twice that of pristine HOF‑101. Based on this improved photoactive interface, a photoelectrochemical aptasensor was developed for the detection of sulfadiazine. The sensor showed a wide linear range from 0.001 to 1000 ng/mL, and achieved a detection limit of 0.7 pg/mL. When applied to spiked water and milk samples, the recoveries ranged from 97.6% to 103.7%. These results indicate that interface engineering via heterojunction construction offers a practical route to enhance the sensing performance of HOF‑based materials, enabling trace‑level detection of pollutants in complex matrices.
