首页|Synthesis and Enhanced Acetone-sensing Properties of Ordered Large-pore Mesoporous Nickel Oxides with Ultrathin Crystalline Frameworks

Synthesis and Enhanced Acetone-sensing Properties of Ordered Large-pore Mesoporous Nickel Oxides with Ultrathin Crystalline Frameworks

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Acetone is a tracer for monitoring air quality and a potential breath maker for diabetes.It remains a great challenge for current portable sensors to sensitively and selectively detect acetone at low-ppb(parts per billion)level.Herein,we present an ordered mesoporous nickel oxide(NiO)with both large mesopores and ultrathin crystalline frameworks for the detection of low-ppb acetone.The ordered mesoporous NiO replicas with predominant large mesopores of 11 nm,high specific surface areas of 121-128 m2/g and ultrathin crystalline frameworks of 5 nm were synthesized by the nanocasting method and the crystalline properties of NiO frameworks were adjusted by changing the annealing temperature from 300 ℃ to 750 ℃,which resulted in different contents of oxygen deficient on the surface of ultrathin frameworks.The gas-sensing properties for all the NiO samples were investigated and the ordered large-pore mesoporous NiO(NiO-600)with maximum oxygen deficient obtained at 600 ℃ exhibited the highest response(Rgas/Rair-1=2.9)toward acetone(1 ppm,ppm:parts per million),which is 3.4 and 30 times larger than those for common mesoporous NiO obtained at 300 ℃ and bulk NiO.Notably,a low detection limit(2 ppb),good selectivity and cycling stability were also observed in NiO-600.

Mesoporous semiconductorNiOGas sensingAcetone

SHAO Chen、GUO Ru、LI Hui、WANG Xiaozhong、YANG Qingfeng、LAI Xiaoyong

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State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,School of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,P.R.China

国家自然科学基金国家自然科学基金国家自然科学基金Natural Science Foundation of Ningxia Hui Autonomous Region,ChinaNatural Science Foundation of Ningxia Hui Autonomous Region,ChinaNingxia Fostering Program for Innovative Leading Talents in Science and Technology,China

52062043U21A2062516721382020AAC030242022AAC02001KJT2017003

2024

10.1007/s40242-024-4054-0

高等学校化学研究(英文版)
吉林大学

高等学校化学研究(英文版)

CSTPCD
影响因子：0.871
ISSN：1005-9040
年,卷(期)：2024.40(3)
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