DataVXACS Applied Nano MaterialsPaper
journal article·2019-09-27

Co3O4 Hollow Nanosphere-Decorated Graphene Sheets for H2S Sensing near Room Temperature

Lihong Liu, Ming Yang, Shan Gao, Xianfa Zhang, Xiaoli Cheng, Yingming Xu, Hui Zhao, Lihua Huo, Zoltán Major

ACS Applied Nano Materials· Volume 2· Issue 9
Publisher page
Source abstract

Abstract

Small-sized Co3O4 hollow nanosphere/graphene (Co3O4–HNS/G) composites are fabricated via a cross-linking deposition. The Co3O4 hollow nanospheres with a diameter of around 15 nm are well-distributed on graphene sheets. The sensor based on the Co3O4–HNS/G (the optimal graphene content is 4.6 wt %) composite exhibits an excellent sensing response (30.6) to 50 ppm of H2S near room temperature of 50 °C, which is 3.3 times that of pristine Co3O4 (92 °C). The lowest H2S gas concentration that can be detected is 0.1 ppm. The composite-based sensor also shows excellent long-term stability, selectivity, and repeatability to H2S at 50 °C. The improved H2S-sensing properties may be attributed to a synergistic effect of unique small-sized Co3O4 mesoporous hollow nanosphere structures, large specific surface area, more chemically adsorbed oxygen, and isotype P–P heterojunctions.
Source: openalex_inverted_index · Quality: baseline

Research context

NanomaterialsCompositesMaterials processing

OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Analytical Chemistry and Sensors · Electrochemical sensors and biosensors

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China

College of Science, Heihe College, Heihe 164300, China

School of Pharmacy, Jiamusi University, Jiamusi 154007, China

Institute of Polymer Product Engineering, Johannes Kepler University Linz, Linz 4040, Austria

Funding

National Natural Science Foundation of China · Program for Science and Technology Project of Heilongjiang province · International Science & Technology Cooperation Program of China · Basic Research Business Fees of Colleges and Universities in Heilongjiang Province

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