Ultrasensitive V doped WO3 1D nanorods heterojunction photodetector with pronounced photosensing activities

Ikram, Muhammad; Rasheed, Sufian; Afzal, Amir Muhammad; Shad, Naveed Akhtar; Javed, Yasir; Mohyuddin, Abrar; Alomayri, Thamer; Sajid, Muhammad Munir; Almahri, Albandary; Hussain, Dilshad

doi:10.1016/j.jallcom.2022.164753

Cited by 8 publications

(3 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Fourier transform infrared spectroscopy (FT‐IR) is recorded to illustrate surface characteristics of PDA, WO 3 and PDA‐coated WO 3 materials (Figure 1c). Pristine WO 3 presents the main absorption band at 707 cm −1 , which could be assigned to the stretching vibration of O−W−O, [20] the peaks at 3473 cm −1 and 1603 cm −1 that correspond to hydroxyl groups (−OH) were detected, indicating that the sample was partially hydrated during the hydrothermal process. For the spectrum of PDA, the peaks at 1603 and 1510 cm −1 are the stretching vibrations of the aromatic ring and indole structure of PDA, and the broad peaks at 3414 cm −1 is assigned to the amino (=NH or −NH 2 ) [33] .…”

Section: Resultsmentioning

confidence: 99%

“…[11] Resulting from wide light absorption, [12] low band gap (2.3-2.8 ev), [13] better mechanical property and stability, [14] low cost and non-toxicity, [15] it has been concerned in catalysis and optoelectronic fields including photocatalysis, [16] energy storage [17] and gas sensitivity. [18] However, the low conduction band edge (∼ 0.8 eV vs NHE (Normal Hydrogen Electrode)), rapid carrier recombination, [19] low electron transport capacity and limited light response range [20,21] of WO 3 make its photocatalytic ability be hindered. To solve the above problems, several strategies have been proposed, such as constructing heterojunctions with other types of semiconductors, [22] or metal/nonmetal doping.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Construction of yolk‐shell structural polydopamine@WO₃ micro/nanospheres for enhanced photocatalytic degradation

et al. 2023

View full text Add to dashboard Cite

Polydopamine‐coated tungsten oxide (PDA@WO3) nanomaterial is synthesized by the polymerization of dopamine around the surface of WO3 to form the perfect yolk‐shell structures, and the optoelectronic properties and photocatalytic performance in the wide pH range are studied. After coating of PDA around the WO3 surface, as‐obtained PDA@WO3 possesses better light absorption, lower band gap, stronger photocurrent response, and lower resistance than pristine WO3. As a result, the improved photocatalytic ability of PDA@WO3 nanocomposites, by optimizing the amount of dopamine, is achieved. Compared with pristine WO3, PDA@WO3 exhibits better photocatalytic activity, and the degradation rate of methyl blue reaches 80.2 % (pH=5.4) and 94.5 % (pH=7.2) after 150 min. Combined band energy with trapping experiments of the active substance, photocatalytic activity and degradation mechanism are discussed. Originated from the π electron conjugation system of PDA and yolk‐shell structure of PDA@WO3, the mobility of photogenerated electrons increase and the recombination of electrons‐holes reduce that result in improvement of the photocatalytic performance of pristine WO3, implying surface‐modified metal oxide with yolk‐shell is a potential photocatalytic material for degradation in wide pH range.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Construction of yolk‐shell structural polydopamine@WO₃ micro/nanospheres for enhanced photocatalytic degradation

et al. 2023

View full text Add to dashboard Cite

show abstract

“…This finding is in agreement with previous reports in the journals. 44 Surface analysis using AFM.-The topographical and morphologies of V-WO 3 films were studied using Atomic Force Microscope (AFM) tapping mode. The 3D images are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Flake-Like WO₃-Based Thin Films for Enhanced Ethanol Sensing Applications

Sriram

Nagaraju²,

Parne

et al. 2023

ECS J. Solid State Sci. Technol.

View full text Add to dashboard Cite

Undoped and vanadium-doped tungsten trioxide (V–WO3) nanocrystalline thin films were prepared on glass substrates with the spray pyrolysis method. The synthesized films were characterized using X-ray diffraction (XRD), Raman spectroscopy, atomic force microscopy (AFM), field-emission scanning electron microscopy (FESEM), UV-visible spectroscopy, and X-ray photoelectron spectroscopy for micro-structural, topographical, optical, and chemical properties, respectively. XRD analysis confirmed that WO3-based thin films were hexagonal phases. The FESEM images showed the interconnected nanoflake-like morphology of the undoped and V-WO3 thin films. AFM investigation confirmed that the average surface roughness of the thin films ranged from 3.36 to 14.2 nm. The optical energy bandgap of the films was estimated from the optical spectrum of absorption. The static liquid distribution method was utilized to examine the gas-sensing characteristics of deposited films. The results show that the 4wt% vanadium-doped WO3 sensor responds to ethanol vapour at room temperature. The response and recovery times towards 50 ppm of ethanol gas were determined as 32 and 21 seconds, respectively. The 4wt.% V-WO3 film has shown an increased response from 1.3 to 2.8, which is 2.15 times more than the undoped WO3.

show abstract

Recent Advances in Low‐Dimensional Nanomaterials for Photodetectors

Kim

Lee

et al. 2023

Small Methods

View full text Add to dashboard Cite

New emerging low‐dimensional such as 0D, 1D, and 2D nanomaterials have attracted tremendous research interests in various fields of state‐of‐the‐art electronics, optoelectronics, and photonic applications due to their unique structural features and associated electronic, mechanical, and optical properties as well as high‐throughput fabrication for large‐area and low‐cost production and integration. Particularly, photodetectors which transform light to electrical signals are one of the key components in modern optical communication and developed imaging technologies for whole application spectrum in the daily lives, including X‐rays and ultraviolet biomedical imaging, visible light camera, and infrared night vision and spectroscopy. Today, diverse photodetector technologies are growing in terms of functionality and performance beyond the conventional silicon semiconductor, and low‐dimensional nanomaterials have been demonstrated as promising potential platforms. In this review, the current states of progress on the development of these nanomaterials and their applications in the field of photodetectors are summarized. From the elemental combination for material design and lattice structure to the essential investigations of hybrid device architectures, various devices and recent developments including wearable photodetectors and neuromorphic applications are fully introduced. Finally, the future perspectives and challenges of the low‐dimensional nanomaterials based photodetectors are also discussed.

show abstract

Ultrasensitive V doped WO3 1D nanorods heterojunction photodetector with pronounced photosensing activities

Cited by 8 publications

References 56 publications

Construction of yolk‐shell structural polydopamine@WO₃ micro/nanospheres for enhanced photocatalytic degradation

Construction of yolk‐shell structural polydopamine@WO₃ micro/nanospheres for enhanced photocatalytic degradation

Flake-Like WO₃-Based Thin Films for Enhanced Ethanol Sensing Applications

Recent Advances in Low‐Dimensional Nanomaterials for Photodetectors

Contact Info

Product

Resources

About

Ultrasensitive V doped WO3 1D nanorods heterojunction photodetector with pronounced photosensing activities

Cited by 8 publications

References 56 publications

Construction of yolk‐shell structural polydopamine@WO3 micro/nanospheres for enhanced photocatalytic degradation

Construction of yolk‐shell structural polydopamine@WO3 micro/nanospheres for enhanced photocatalytic degradation

Flake-Like WO3-Based Thin Films for Enhanced Ethanol Sensing Applications

Recent Advances in Low‐Dimensional Nanomaterials for Photodetectors

Contact Info

Product

Resources

About

Construction of yolk‐shell structural polydopamine@WO₃ micro/nanospheres for enhanced photocatalytic degradation

Construction of yolk‐shell structural polydopamine@WO₃ micro/nanospheres for enhanced photocatalytic degradation

Flake-Like WO₃-Based Thin Films for Enhanced Ethanol Sensing Applications