Zinc Phthalocyanine Thin Film-Based Optical Waveguide H2S Gas Sensor

Wumaier, Kediliya; Mamtmin, Gulgina; Ma, Qingrong; Maimaiti, Asiya; Nizamidin, Patima; Yimit, Abliz

doi:10.1007/s13320-021-0623-8

Cited by 8 publications

(2 citation statements)

References 35 publications

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“…Thus, the gas level can be determined by detecting carbon monoxide. Various devices have been utilized for CO detection, including surface acoustic waves, optical gas sensors, electrochemical gas sensors, and metal oxide gas sensors . Among these, metal oxide semiconductor (MOS) sensors have gained widespread use for gas sensing due to their high sensitivity, excellent stability, and ease of fabrication …”

Section: Introductionmentioning

confidence: 99%

CeO₂/In₂O₃ Hollow Nanosphere Heterojunction for Real-Time CO Monitoring under High Humidity

Li,

Zhang,

Han

et al. 2024

ACS Appl. Nano Mater.

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Real-time monitoring of carbon monoxide (CO) is crucial for ensuring human safety. However, the accuracy of the CO detection is significantly diminished by high ambient humidity. This study focuses on synthesizing CeO 2 /In 2 O 3 hollow nanospheres with varying CeO 2 contents (0, 1, 2, 3 mol %) using a twostep method. Testing under different humidity conditions demonstrates that incorporating CeO 2 not only amplifies the response rate of pure In 2 O 3 sensors (from 1.4 to 1.65 at 100 ppm of CO) but also curtails the response and recovery times (from 11 s/27 s to 6 s/23 s) at 280 °C. Furthermore, CeO 2 /In 2 O 3 composite sensors exhibit improved selectivity, repeatability, and long-term stability. Notably, the robust CO detection performance under high humidity verifies that the fabricated CeO 2 /In 2 O 3 sensors can monitor CO in humid environments. The enhanced performance stems from the unique hollow structure, abundant mesopores on the surface, and the heterojunction between CeO 2 and In 2 O 3 .

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Section: Introductionmentioning

confidence: 99%

CeO₂/In₂O₃ Hollow Nanosphere Heterojunction for Real-Time CO Monitoring under High Humidity

Li,

Zhang,

Han

et al. 2024

ACS Appl. Nano Mater.

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“…Fiber optic applications are changing how we live, mainly how we produce and develop industry. Fiber optics can be used in various multipurpose sensors [1], from gas sensing [2,3], to displacement sensors, to pH and viscosity sensors in different configurations and optical principal effects [4][5][6][7][8][9]. In 1975, fiber optic sensing was introduced for various purposes, and within a few years, the technology was used in oil extraction and medical purposes.…”

Section: Introductionmentioning

confidence: 99%

Curcuma longa-Based Optical Sensor for Hydrochloric Acid and Ammonia Vapor Detection

Juárez

Carrión

et al. 2023

Sensors

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In this research, we present a prototype optical system that offers significant advances in detecting hydrochloric acid (HCl) and ammonia (NH3) vapors. The system utilizes a natural pigment sensor based on Curcuma longa that is securely attached to a glass surface support. Through extensive development and testing with HCl (37% aqueous solution) and NH3 (29% aqueous solution) solutions, we have successfully demonstrated the effectiveness of our sensor. To facilitate the detection process, we have developed an injection system that exposes C. longa pigment films to the targeted vapors. The interaction between the vapors and the pigment films triggers a distinct color change, which is then analyzed by the detection system. By capturing the transmission spectra of the pigment film, our system allows a precise comparison of these spectra at different concentrations of the vapors. Our proposed sensor exhibits remarkable sensitivity, allowing the detection of HCl at a concentration of 0.009 ppm using only 100 µL (2.3 mg) of pigment film. In addition, it can detect NH3 at a concentration of 0.03 ppm with a 400 µL (9.2 mg) pigment film. Integrating C. longa as a natural pigment sensor in an optical system opens up new possibilities for detecting hazardous gases. The simplicity and efficiency of our system, combined with its sensitivity, make it an attractive tool in environmental monitoring and industrial safety applications.

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Development of an Optical Switching BIPA‐TC‐HOF Film‐Based Optical Waveguide and Evaluation of Its ON‐OFF Gas Sensing Characteristics

Nizamidin,

Li,

et al. 2024

Advanced Optical Materials

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Optical switching materials that respond to external stimuli including acidity/alkalinity, redox conditions, temperature, and guest molecules are extremely desirable. This paper reports hydrogen‐bonded organic framework (HOF) films with structure‐dependent optical switching properties in the presence of acidic/alkaline gases. A series of TPPS‐[(bdc)2‐(BIPA‐TC)]n‐HOF films, constructed from terephthalic acid, benzoimidephenanthroline tetracarboxylic acid, and phenylporphyrin sulfonate, were prepared on the surface of a LiNbO3 film composite optical waveguide (COWG) substrate using the solgel method. Upon increasing the drying temperature from 90 to 160 °C, the BIPA‐TC‐HOF‐x film structure evolved from flatter porous to a birds‐nest, and subsequently to a granular structure. The hostguest interactions between the BIPA‐TC‐HOF and the analyte gases induced different degrees of switching in terms of the refractive index. Gas sensing selectivity of the HOF‐x film COWG progressed from EDA sensing to EDA and H2S co‐sensing, and finally to H2S without any interference from the other acid/base gases. This phenomenon was attributed to the variations in the acidity/alkalinity of the BIPA‐TC‐HOF caused by structural changes during the drying process. The gas adsorption kinetics were found to be consistent with Pseudo‐Second‐Order kinetic model. This work provides a novel approach for the development of optic switching sensors.

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Zinc Phthalocyanine Thin Film-Based Optical Waveguide H2S Gas Sensor

Cited by 8 publications

References 35 publications

CeO₂/In₂O₃ Hollow Nanosphere Heterojunction for Real-Time CO Monitoring under High Humidity

CeO₂/In₂O₃ Hollow Nanosphere Heterojunction for Real-Time CO Monitoring under High Humidity

Curcuma longa-Based Optical Sensor for Hydrochloric Acid and Ammonia Vapor Detection

Development of an Optical Switching BIPA‐TC‐HOF Film‐Based Optical Waveguide and Evaluation of Its ON‐OFF Gas Sensing Characteristics

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Zinc Phthalocyanine Thin Film-Based Optical Waveguide H2S Gas Sensor

Cited by 8 publications

References 35 publications

CeO2/In2O3 Hollow Nanosphere Heterojunction for Real-Time CO Monitoring under High Humidity

CeO2/In2O3 Hollow Nanosphere Heterojunction for Real-Time CO Monitoring under High Humidity

Curcuma longa-Based Optical Sensor for Hydrochloric Acid and Ammonia Vapor Detection

Development of an Optical Switching BIPA‐TC‐HOF Film‐Based Optical Waveguide and Evaluation of Its ON‐OFF Gas Sensing Characteristics

Contact Info

Product

Resources

About

CeO₂/In₂O₃ Hollow Nanosphere Heterojunction for Real-Time CO Monitoring under High Humidity

CeO₂/In₂O₃ Hollow Nanosphere Heterojunction for Real-Time CO Monitoring under High Humidity