Lamellar Nanocomposite Based on a 1D Crayfish-like CeIII- Substituted Phospho(III)tungstate Semiconductor and Polyaniline Used as a High-Performance Humidity Sensing Device
Lamellar Nanocomposite Based on a 1D Crayfish-like CeIII- Substituted Phospho(III)tungstate Semiconductor and Polyaniline Used as a High-Performance Humidity Sensing Device
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DOI：
10.1021/acsami.2c13998
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发表时间：
2022-10-18
影响因子：
9.5
通讯作者：
Chen，Lijuan
中科院分区：
文献类型：
--
作者：
Tang，Feng;Li，Yanzhou;Chen，Lijuan
为了满足人们对日常生活和健康的智能化管理的需求，制造和开发方便、高灵敏度、易于小型化、低成本的湿度监测设备在人工智能和物联网快速发展的时代显得尤为重要。聚苯胺 (PANI) 因其可设计的功能特性而成为一种颇具吸引力的湿度传感材料。然而，用于湿度传感的聚苯胺改性多金属氧酸盐（POM）仍然很少见。作为概念验证，基于 PANI 和新型一维稀土取代磷（III）钨酸盐获得了一种新型湿度传感复合材料 [H2N(CH3)2]9Na3H6[Ce2(H2O)3W5O13(C2O4)][HPIIIW9O33]2[(HPIII)2W15O54]·42H2O (1)。值得注意的是，1的阴离子结构包含由异金属[Ce2(H2O)3W5O32(C2O4)]30-簇连接的三空Keggin型[B-α-HPIIIW9O33]8和Dawson样[(HPIII)2W15O54]10-亚基。此外，1/PANI复合材料表现出典型的半导体特性，具有“带状”导电机制。基于1/PANI的湿度传感装置具有较宽的传感范围（11∼97%相对湿度）、快速的响应/恢复时间（3.45 s/3.24 s）、良好的重复性和长期稳定性（超过3个月）。此外，还提出了可能的传感机制。这项工作为通过 POM 材料化学设计高性能湿度传感材料提供了巨大的可能性。
In order to meet people’s demand for intelligent management of daily life and health, manufacturing and developing humidity monitoring equipment with convenience, high sensitivity, easy miniaturization, and low cost is particularly important in the era of rapid development of artificial intelligence and the Internet of Things. Polyaniline (PANI) is an attractive humidity sensing material due to its designable functional properties. However, PANI modified polyoxometalates (POMs) for humidity sensing are still rare. As a proof of concept, a novel moisture sensing composite material was obtained based on PANI and a novel 1D rare-earth-substituted phospho(III)tungstate [H2N(CH3)2]9Na3H6[Ce2(H2O)3W5O13(C2O4)][HPIIIW9O33]2[(HPIII)2W15O54]·42H2O (1). Notably, the anion structure of1contains trivacant Keggin-type [B-α-HPIIIW9O33]8–and Dawson-like [(HPIII)2W15O54]10–subunits linked by a heterometallic [Ce2(H2O)3W5O32(C2O4)]30–cluster. Furthermore, the1/PANI composite shows a typical semiconductive characteristic with a “band-like” conductive mechanism. The fabricated1/PANI-based humidity sensing device exhibits a broad sensing range (11∼97% relative humidity), fast response/recovery time (3.45 s/3.24 s), good repeatability, and long-term stability (over 3 months). Additionally, the possible sensing mechanism is proposed. This work offers an enormous possibility for the design of high-performance humidity sensing materials through POM material chemistry.