Thus, the research and development of an H 2 S gas sensor that is low cost, environmentally friendly and able to achieve on-line monitoring of H 2 S gas is highly significant in practice [ 4 ].
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Thus, the research and development of an H 2 S gas sensor that is low cost, environmentally friendly and able to achieve on-line monitoring of H 2 S gas is highly significant in practice [ 4 ].