Scavenger-free and self-powered photocathodic sensing system for aqueous hydrogen peroxide monitoring by CuO/ZnO nanostructure
A scavenger-free and self-powered photoelectrochemical sensor is developed to rapidly detect hydrogen peroxide (H2O2) in the aqueous phase. The resulting CuO/ZnO photocathode composite exhibits two-times higher photocurrent density than the bare CuO under simulated sunlight irradiation, attributed t...
| Main Authors: | , , , , , , , |
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| Format: | Article |
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Elsevier
2020
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| Online Access: | http://psasir.upm.edu.my/id/eprint/87528/ |
| _version_ | 1848860451686842368 |
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| author | Hao, Wu Hoi, Ying Ching Tsang, Daniel C.W Huang, Nay Ming Xie, Zhirun Lim, Hong Ngee Yong, Sik Ok Ng, Yun Hau |
| author_facet | Hao, Wu Hoi, Ying Ching Tsang, Daniel C.W Huang, Nay Ming Xie, Zhirun Lim, Hong Ngee Yong, Sik Ok Ng, Yun Hau |
| author_sort | Hao, Wu |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | A scavenger-free and self-powered photoelectrochemical sensor is developed to rapidly detect hydrogen peroxide (H2O2) in the aqueous phase. The resulting CuO/ZnO photocathode composite exhibits two-times higher photocurrent density than the bare CuO under simulated sunlight irradiation, attributed to the formed CuO/ZnO heterojunction with well-aligned band energy levels which promotes the interfacial charge separation of photogenerated electron-hole pairs. Herein, the resulting photocathode composite is assembled as a photoelectrochemical hydrogen peroxide sensor, which shows an instant response within 0.1 s and an approximately 3-fold increase in photocurrent density upon adding 30 mM of H2O2 into the electrolyte. The results further demonstrate that the effect of H2O2 on photocurrent response is concentration-dependent over the wide linear ranges of 0.2–1.0 mM and 1.0–8.0 mM with strong correlations (R2) of 0.992 and 0.986, respectively. The proposed CuO/ZnO photocathode composite can guide the design of efficient hybrid photoelectrodes for solar energy conversion applications. |
| first_indexed | 2025-11-15T12:45:27Z |
| format | Article |
| id | upm-87528 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T12:45:27Z |
| publishDate | 2020 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-875282022-11-23T02:14:09Z http://psasir.upm.edu.my/id/eprint/87528/ Scavenger-free and self-powered photocathodic sensing system for aqueous hydrogen peroxide monitoring by CuO/ZnO nanostructure Hao, Wu Hoi, Ying Ching Tsang, Daniel C.W Huang, Nay Ming Xie, Zhirun Lim, Hong Ngee Yong, Sik Ok Ng, Yun Hau A scavenger-free and self-powered photoelectrochemical sensor is developed to rapidly detect hydrogen peroxide (H2O2) in the aqueous phase. The resulting CuO/ZnO photocathode composite exhibits two-times higher photocurrent density than the bare CuO under simulated sunlight irradiation, attributed to the formed CuO/ZnO heterojunction with well-aligned band energy levels which promotes the interfacial charge separation of photogenerated electron-hole pairs. Herein, the resulting photocathode composite is assembled as a photoelectrochemical hydrogen peroxide sensor, which shows an instant response within 0.1 s and an approximately 3-fold increase in photocurrent density upon adding 30 mM of H2O2 into the electrolyte. The results further demonstrate that the effect of H2O2 on photocurrent response is concentration-dependent over the wide linear ranges of 0.2–1.0 mM and 1.0–8.0 mM with strong correlations (R2) of 0.992 and 0.986, respectively. The proposed CuO/ZnO photocathode composite can guide the design of efficient hybrid photoelectrodes for solar energy conversion applications. Elsevier 2020-06 Article PeerReviewed Hao, Wu and Hoi, Ying Ching and Tsang, Daniel C.W and Huang, Nay Ming and Xie, Zhirun and Lim, Hong Ngee and Yong, Sik Ok and Ng, Yun Hau (2020) Scavenger-free and self-powered photocathodic sensing system for aqueous hydrogen peroxide monitoring by CuO/ZnO nanostructure. Chemical Engineering Science, 226. art. no. 115886. pp. 1-7. ISSN 0009-2509 https://www.sciencedirect.com/science/article/pii/S0009250920304188 10.1016/j.ces.2020.115886 |
| spellingShingle | Hao, Wu Hoi, Ying Ching Tsang, Daniel C.W Huang, Nay Ming Xie, Zhirun Lim, Hong Ngee Yong, Sik Ok Ng, Yun Hau Scavenger-free and self-powered photocathodic sensing system for aqueous hydrogen peroxide monitoring by CuO/ZnO nanostructure |
| title | Scavenger-free and self-powered photocathodic sensing system for aqueous hydrogen peroxide monitoring by CuO/ZnO nanostructure |
| title_full | Scavenger-free and self-powered photocathodic sensing system for aqueous hydrogen peroxide monitoring by CuO/ZnO nanostructure |
| title_fullStr | Scavenger-free and self-powered photocathodic sensing system for aqueous hydrogen peroxide monitoring by CuO/ZnO nanostructure |
| title_full_unstemmed | Scavenger-free and self-powered photocathodic sensing system for aqueous hydrogen peroxide monitoring by CuO/ZnO nanostructure |
| title_short | Scavenger-free and self-powered photocathodic sensing system for aqueous hydrogen peroxide monitoring by CuO/ZnO nanostructure |
| title_sort | scavenger-free and self-powered photocathodic sensing system for aqueous hydrogen peroxide monitoring by cuo/zno nanostructure |
| url | http://psasir.upm.edu.my/id/eprint/87528/ http://psasir.upm.edu.my/id/eprint/87528/ http://psasir.upm.edu.my/id/eprint/87528/ |