Article
Multidisciplinary Sciences
Alexandra Tavasoli, Abdelaziz Gouda, Till Zahringer, Young Feng Li, Humayra Quaid, Camilo Viasus J. Perez, Rui Song, Mohini Sain, Geoffrey Ozin
Summary: This study demonstrates improved photocatalytic dry reforming performance by selectively phosphating the surface of a CeO2 nanorod support to modulate the surface basicity of a Ni-CeO2 photocatalyst. An optimum phosphate content is found, leading to little activity loss and carbon deposition over a 50-hour reaction period. The enhanced performance is attributed to the Lewis basic properties of the PO43- groups, which improve CO2 adsorption, facilitate the formation of small nickel metal clusters, and provide mechanical stability. A hybrid photochemical-photothermal reaction mechanism is also demonstrated.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Suresh Kumar Pandey, Manish Kumar Tripathi, V Ramanathan, Pradeep Kumar Mishra, Dhanesh Tiwary
Summary: This article characterizes the photocatalytic performance of the heterostructure g-C3N4/NiO for the mineralization of malachite green (MG) dye under UV light exposure in an aqueous medium. The synthesized catalyst exhibits superior optical band gap matching and regulates internal charge transfer of excitons within the heterojunction. The degradation of MG using the nanocomposite g-C3N4/NiO is achieved by the existence of superoxide radicals as the main active species, showing one of the highest turn over frequencies to date.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Milad Sabzehparvar, Fatemeh Kiani, Nooshin Salman Tabrizi
Summary: This study presents a magnetically-recyclable TiO2-NiO-Ag p-n/Schottky heterojunction photocatalyst with enhanced photocatalytic activity, showcasing its potential for practical application in environmental remediation and other photocatalytic applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Huai Qin Fu, Junxian Liu, Nicholas M. Bedford, Yun Wang, Ji Wei Sun, Yu Zou, Mengyang Dong, Joshua Wright, Hui Diao, Porun Liu, Hua Gui Yang, Huijun Zhao
Summary: In this study, an in operando electrochemically synthesized Cr2O3-Ag heterostructure electrocatalyst was reported for efficient electrocatalytic reduction of CO2 to CO. The obtained Cr2O3@Ag showed excellent electrocatalytic performance and operational stability, with the enhanced performance attributed to the stabilization effect of CO2 intermediates induced by the Cr2O3-Ag heterostructure.
ADVANCED MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Jiahe Song, Jingjing Zhang, Kezhen Qi, Claudio Imparato, Shu-yuan Liu
Summary: The AIS-QDs/GCN nanocomposite, obtained by modifying nonmetallic polymer g-C3N4 with Ag-In sulfide quantum dots (AIS QDs), exhibits higher photocatalytic activity compared to pure g-C3N4, with significantly improved tetracycline degradation and hydrogen generation. The enhanced photocatalytic activity of AIS-QDs/GCN is attributed to the broadening of the light absorption range, acceleration of charge transfer, and reduction of the carrier pair recombination rate. This study provides an important step towards enhancing the catalytic performance of g-C3N4 and has potential applications in water pollutant degradation and hydrogen production.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Olavo M. Perrone, Antonio C. Roveda Jr, Daniel A. de Moraes, Diogo P. Volanti
Summary: Monitoring VOCs is crucial for human health, and semiconductor gas sensors are a promising strategy for detection. This study synthesized NiO/In2O3 heterostructure using innovative methods and investigated its performance as a gas sensor for detecting VOCs. NiO/In2O3 showed superior selectivity, stability, and sensitivity in detecting n-butanol due to the p-n heterojunction and increased adsorption sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Shahid Iqbal, Ali Bahadur, Mohsin Javed, Othman Hakami, Rana Muhammad Irfan, Zahoor Ahmad, Abeer AlObaid, Murefah Mana Al-Anazy, Hanadi B. Baghdadi, Hisham S. M. Abd-Rabboh, Tahani Al-Muhimeed, Guocong Liu, Muhammad Nawaz
Summary: The highly efficient Ag-ZnO/S-g-C3N4 photocatalyst synthesized via a two-step hydrothermal route successfully degraded methylene blue dye, with the photo corrosion of ZnO inhibited by doping with Ag and coupling with S-g-C3N4.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Ying Meng, Wen Wang, Chunqiu Zhang, Jixin Yao, Changzheng Xie, Zhenfa Zi, Changcheng Lin, Shibin Lu, Guang Li
Summary: An improved synthesis method was reported for the preparation of NiO/Fe2O3@NC composite as the counter electrode in dye-sensitized solar cells. The composite exhibited superior electrochemical properties, achieving a power conversion efficiency of 8.69%, higher than that of NiO@NC (6.51%), Fe2O3@NC (6.22%), and commercial Pt counterparts (7.52%). This study is of great significance for the development of efficient electrocatalysts.
Article
Environmental Sciences
Fatima Zahra Janani, Habiba Khiar, Nawal Taoufik, Alaaeddine Elhalil, M'hamed Sadiq, Said Mansouri, Noureddine Barka
Summary: In this study, ZnO-Zn2TiO4 (ZTM) material was synthesized using a novel method and its physical features were analyzed. The results showed that ZTM-600, synthesized through calcination at 600 degrees C, exhibited the highest degradation efficiency (99%). This study demonstrates a promising photocatalyst and provides new insights for enhancing photocatalytic performance and effective wastewater treatment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Lalitha Gnanasekaran, Wei-Hsin Chen, Matias Soto-Moscoso
Summary: This study synthesized nanosized NiO and ZnO materials, as well as NiO/ZnO composites, and evaluated their properties and photocatalytic degradation efficiency. The NiO/ZnO (70:30) composite showed the highest efficiency, attributed to the higher NiO content and surface area.
Article
Materials Science, Ceramics
H. Ferhati, A. Bendjerad, F. Djeffal, A. Benhaya, A. Saidi
Summary: A high-performance multispectral photodetector based on p-NiO/Ag/n-ITO heterostructure was fabricated using RF magnetron sputtering technique at room temperature. The device showed high absorbance and enhanced performance under UV, visible, and NIR lights, indicating potential for various optoelectronic applications. The broadband photodetection property enabled by the optimized NiO/Ag/ITO heterostructure opens new possibilities for low-cost devices with multiple sensing purposes.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Environmental
Sheng-Zhe Zhao, Yun Lu, Ran Lu, Yong-Da Hu, Raul D. Rodriguez, Jin-Ju Chen
Summary: BiOBr/TiO2 nanotubes were fabricated to enhance the removal of organic pollutants from water through the synergy of adsorption and photocatalysis. The nanotubes showed significantly improved separation efficiency of photo-generated carriers, synergistic adsorption, and photocatalytic decomposition compared to pure TiO2 nanotubes. The work provides a promising strategy for combining the advantages of adsorption and photocatalytic technologies for environmental remediation, which is of significant interest to researchers in environmental science, materials science, and chemical engineering.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
S. Chaoudhary, A. Dewasi, V Rastogi, R. N. Pereira, A. Sinopoli, B. Aissa, A. Mitra
Summary: This work compares the self-powered broadband photodetection properties of p-NiO/n-Si and p-NiO/Ag-NPs/n-Si heterojunction diodes. The results show that the Ag-NPs mediated heterostructure exhibits better photoresponse in the self-powered broadband range.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
Jingru Di, Yuping Duan, Huifang Pang, Xinran Ma, Jia Liu
Summary: In this study, a novel two-dimensional basalt@NiO heterostructure was designed and synthesized, with microwave absorption performance controlled by sintering temperature to enhance polarization loss. The composite shows good environmental stability.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Haoming Sun, Meng Cao, Pinhua Zhang, Xiaojing Tian, Manli Lu, Lulu Du, Kaifeng Xue, Guangliang Cui
Summary: This study demonstrates the enhancement of gas sensitivity in Cu2O/NiO heterostructured nanoarrays for H2S gas detection using a magnetic field. The results show that the response rate of the nanoarrays is significantly improved by the magnetic field, especially at low concentrations.
Article
Materials Science, Multidisciplinary
Tuhin S. Mondal, Swarupananda Bhattacharjee, Anirban Roychowdhury, Santanab Majumder, Dipankar Das, Manoj K. Mitra, Chandan K. Ghosh
MATERIALS RESEARCH EXPRESS
(2015)
Article
Engineering, Electrical & Electronic
Milan Sasmal, Santanab Majumder, Tarun Kanti Bhattacharyya
IEEE SENSORS JOURNAL
(2018)
Article
Engineering, Electrical & Electronic
Avik Sett, Santanab Majumder, Tarun Kanti Bhattacharyya
Summary: The flexible room temperature ammonia gas sensor fabricated on a transparent sheet using reduced graphene oxide nanosheets shows high response and selectivity. It exhibited a very high response of 930% toward 400-ppm ammonia at 25 degrees C and 45% relative humidity level, and was found to be humidity resistant. Additionally, the sensor demonstrated quick response time, full recovery, and flexibility during bending tests.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Engineering, Electrical & Electronic
Santanab Majumder, Avik Sett, Dipak Kumar Goswami, Tarun Kanti Bhattacharyya
Summary: In this study, 2H MoS2 nanoflakes were exfoliated and modified with amine groups to create a humidity sensitive layer. The enhanced response to humidity levels was explained by a novel pseudo electron injection model, which resulted in improved sensor performance. The study demonstrated good stability and low hysteresis in the devices, with extinction coefficients supporting the obtained results.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Engineering, Electrical & Electronic
Santanab Majumder, Avik Sett, Dipak Kumar Goswami, Tarun Kanti Bhattacharyya
Summary: This work demonstrates the implementation of thioglycolic acid (TGA) functionalized water-soluble NH2-molybdenum disulfide (MoS2) nanosheets as sensitive layers for toxic heavy metal ion sensing in drinking water. The sensor device was tested for several ions commonly found in drinking water, and it showed that Cd had a higher response compared to Hg. The possible reason for this competitive dominance of Hg (II) adsorption may be the affinity of thiol groups present in the TGA molecules for Hg (II) over Cd (II) ions.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)