基于还原氧化石墨烯的高性能乙醇传感器的制备和性能研究

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高性能乙醇传感器在还原氧化石墨烯上原位修饰Zn2SnO4纳米粒子本研究论文主要介绍了一种高性能乙醇传感器的制备方法，该传感器基于还原氧化石墨烯上原位修饰的Zn2SnO4纳米粒子。该纳米粒子的制备方法是通过溶剂热合成法结合后续退火处理来实现的。首先，研究人员成功地合成了Zn2SnO4纳米粒子/reduced graphene oxide（RGO）纳米复合材料，RGO的含量不同。然后，通过对纳米粒子的表征和分析，研究人员发现了Zn2SnO4纳米粒子的尺寸约为20nm。该研究的主要贡献在于开发了一种高性能的乙醇传感器，该传感器可以实时检测乙醇气体的浓度。该传感器的检测限低于10ppm，响应时间短于10秒，且在室温下工作。这些特性使得该传感器在实际应用中具有广泛的前景。在这项研究中，研究人员还探讨了Zn2SnO4纳米粒子/reduced graphene oxide纳米复合材料的gas-sensing性能。结果表明，该纳米复合材料具有很高的gas-sensing性能，能够实时检测乙醇气体的浓度。本研究论文的主要贡献在于开发了一种高性能的乙醇传感器，该传感器基于还原氧化石墨烯上原位修饰的Zn2SnO4纳米粒子。该传感器具有很高的gas-sensing性能，能够实时检测乙醇气体的浓度，具有广泛的应用前景。知识点： 1. 高性能乙醇传感器：基于还原氧化石墨烯上原位修饰的Zn2SnO4纳米粒子。 2. Zn2SnO4纳米粒子的制备方法：溶剂热合成法结合后续退火处理。 3. Zn2SnO4纳米粒子的尺寸：约20nm。 4. 高性能乙醇传感器的特性：检测限低于10ppm，响应时间短于10秒，室温下工作。 5. Zn2SnO4纳米粒子/reduced graphene oxide纳米复合材料的gas-sensing性能：很高的gas-sensing性能，能够实时检测乙醇气体的浓度。 6. 该研究的应用前景：广泛的应用前景，例如在工业生产、环境监测和医疗保健等领域。

Contents lists available at ScienceDirect

Ceramics International

journal homepage: www.elsevier.com/locate/ceramint

In situ decoration of Zn

SnO

nanoparticles on reduced graphene oxide for

high performance ethanol sensor

Yanwei Li, Na Luo, Guang Sun

⁎

, Bo Zhang, Long Lin, Honghong Jin, Yan Wang

⁎

, Hari Bala,

Jianliang Cao, Zhanying Zhang

School of Materials Science and Engineering, Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province, Henan

Polytechnic University, Jiaozuo 454000, PR China

ARTICLE INFO

Keywords:

SnO

Reduced graphene oxide

Nanocomposite

Gas-sensing performance

Ethanol sensor

ABSTRACT

Developing novel metal oxide semiconductor (MOS) gas-sensing materials with high performance has attracted

much attention in the ﬁeld of gas sensor. In this work, Zn

SnO

nanoparticles/reduced graphene oxide (ZTO/

RGO) nanocomposites with various contents of RGO were successfully synthesized via a solvothermal method

combined with subsequent annealing process. Through the present method, ZTO nanoparticles with the size

about 20 nm were in situ decorated on the surface of RGO nanosheets. The results of gas-sensing tests indicated

that the as-prepared ZTO/RGO showed an enhanced sensing performance to ethanol in comparison with pure

ZTO. The response of the sensor fabricated with 8ZTO/RGO (with the optimal mass ratio of ZTO:RGO = 8:1) to

100 ppm ethanol at the optimal operating temperature of 275 °C is as high as 38, which is about 6 times higher

than that of the bare ZTO sensor. Besides of high sensitivity, the 8ZTO/RGO sensor also showed impressive

selectivity and fast response/recover behavior, as well as good linearity in a relatively wide range of ethanol

concentration (5–1200 ppm). These good sensing characteristics make 8ZTO/RGO a promising candidate for

practically detecting ethanol. The gas-sensing mechanism of the composite to ethanol was also discussed in

detail.

1. Introduction

During the past decades, metal oxide semiconductor (MOS) based

gas sensors have attracted much research interest in gas detection

ﬁelds, such as public and domestic safety, industrial processes, and

monitoring of air pollution, due to the merits of low production cost,

easy miniaturization, and superior ability to detect various gases [1].As

the sensor's performance relies heavily on the sensing material, many

research eﬀorts have focused on the design and synthesis of MOS sen-

sing materials with high performance. Up to now, diﬀerent MOSs have

been developed, such as ZnO [2,3], SnO

[4],Fe

[5],Zn

SnO

[6–8], etc. Through precisely controlling their particle size, shape, and

micro/nanostructure, the gas-sensing properties of these materials can

be actually improved [9–11]. While, subject to their intrinsic physical

and chemical properties, MOSs with single component are diﬃcult to

achieve satisﬁed sensing performance, especially in the aspects of

sensitivity and selectivity. In order to achieve high sensing perfor-

mances, recent progress on MOS has directed to the construction of

MOS based nanocomposites. In comparison with the single-MOS

counterpart, MOS nanocomposites, beneﬁt from the synergistic eﬀect

between diﬀerent components, are considered to be easier to get better

gas-sensing property [12– 15].

SnO

(ZTO) is an important n-type transparent semiconductor

with a band gap of 3.6 eV [16]. Due to its good thermal stability, high

chemical sensitivity, and low-visibility absorption, ZTO has been widely

studied in the ﬁelds of gas sensor [7], photocatalyst [17], solar cell

[18], and lithium batteries [19]. When applied as gas-sensing materials,

ZTO can exhibits relatively good sensing properties to some gases

[6,8,20,21]. Chen et al. synthesized the nanorods-assembled ZTO mi-

croﬂower via a one-pot hydrothermal route, and found that such a

hierarchical ZTO nanostructure showed good sensitivity to ethanol [6].

Zhao et al. reported the synthesis of ZTO polyhedrons via a facile hy-

drothermal method. Gas sensing test revealed that the prepared ZTO

polyhedrons gave a response of 37–100 ppm triethylamine [20].

Tharsika et al. prepared ZTO nanowires via a carbon assisted thermal

evaporation process with the help of a gold catalyst. The prepared ZTO

nanowires exhibited good ethanol sensing performance [21]. Although,

diﬀerent morphological ZTO nanomaterials have been synthesized and

applied as gas sensing materials in previous reports, it is still a chal-

lenge to further improve the gas-sensing properties of ZTO, and hence

https://doi.org/10.1016/j.ceramint.2018.01.107

Received 8 December 2017; Received in revised form 14 January 2018; Accepted 14 January 2018

⁎

Corresponding authors.

E-mail addresses: mcsunguang@163.com (G. Sun), yanwang@hpu.edu.cn (Y. Wang).

Ceramics International 44 (2018) 6836–6842

Available online 19 January 2018

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