Enhanced photoeletrochemical biosensing performance from rutile nanorod/anatase nanowire junction array

Yan, Bingdong; Zhuang, Yi; Jiang, Yulin; Xu, Wei; Chen, Yongjun; Tu, Jinchun; Wang, Xiaohong; Wu, Qiang

doi:10.1016/j.apsusc.2018.07.088

Cited by 26 publications

(14 citation statements)

References 29 publications

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“…RQ-120 shows the highest photocurrent response and the minimum arc radius in the EIS Nyquist plot, indicating its enhanced separation and transfer efficiency of photogenerated charges carriers compared to other samples. 50 Light Absorption and Band Structures. The light absorption abilities of sg-673, RQ-120, SN-120, and sg-1073 are characterized in Figure 9a.…”

Section: Effects Of Several Factors On the Photocatalyticsupporting

confidence: 91%

“…Figure c,d shows the transient photocurrent response and the electrochemical impedance spectra (EIS) of sg-673, sg-1073, SN-120, and RQ-120. RQ-120 shows the highest photocurrent response and the minimum arc radius in the EIS Nyquist plot, indicating its enhanced separation and transfer efficiency of photogenerated charges carriers compared to other samples …”

Section: Resultsmentioning

confidence: 95%

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Construction of the Rutile/Anatase Micro-Heterophase Junction Photocatalyst from Anatase by Liquid Nitrogen Quenching Method

Qiu

Shen

Lin

et al. 2021

ACS Appl. Energy Mater.

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Heterophase junction composite semiconductors have been documented to exhibit better photocatalytic activity than the corresponding single-phase semiconductors for chemical reactions such as the hydrogen evolution and the degradation of pollutants. However, how to further improve the photocatalytic activity of these materials is a great challenge from the perspective of theory and practice. Herein, we report the synthesis of the rutile/anatase micro-heterophase junction from nanoscale anatase TiO 2 by a rapid thermal treatment followed by liquid nitrogen quenching (RQ). The RQ micro-heterophase junction sample showed excellent photocatalytic hydrogen evolution activity, which has 4−5 times higher hydrogen production rate than that of nude anatase and P25-TiO 2 , and 2 times better hydrogen production rate than the anatase/rutile TiO 2 heterophase sample with comparable Brunauer−Emmett−Teller (BET) surface area and phase composition obtained through slow thermal treatment and natural cooling (SN) process. The enhanced photocatalytic capacity of the RQ sample is attributed to the formation of a rutile/anatase micro-heterophase junction and its modification of the heterophase interface in the treatment process. Especially, the RQ-TiO 2 sample shows a stronger electron paramagnetic resonance (EPR) signal of Ti 3+ than the pristine anatase, rutile TiO 2 , and SN-TiO 2 , implying the formation of Ti 3+ ions at the interface between anatase and rutile components. This results in moving down the Fermi level of the rutile phase by 330 meV. This increases the Fermi level difference between anatase and rutile, increases the build-in electric field (BIEF) of the anatase/rutile heterophase junction, and the separation as well as the transfer of photogenerated charge carriers more effective through the rutile/anatase heterophase interface. This work provides not only a facile method for the preparation of the rutile/anatase micro-heterophase junction from anatase but also finds a pathway to regulate the BIEF with a self-doped low-valence metal ion.

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Section: Effects Of Several Factors On the Photocatalyticsupporting

confidence: 91%

Section: Resultsmentioning

confidence: 95%

Construction of the Rutile/Anatase Micro-Heterophase Junction Photocatalyst from Anatase by Liquid Nitrogen Quenching Method

Qiu

Shen

Lin

et al. 2021

ACS Appl. Energy Mater.

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“…Nanorod arrays were grown referring to the previous report. 21 In a typical process, the transparent precursor solution containing 13 mL of hydrochloric acid (38 wt%), 15 mL of deionized water and 440 mL of tetrabutyl titanate was transferred into a Teon-lined autoclave with a volume of 50 mL and the FTO substrate was introduced in the solution. The autoclave was kept in an oven at 150 C for 10 h. Aer cooling to room temperature, the FTO glass was rinsed with deionized water and ethanol several times.…”

Section: Fabrication Of Tio 2 Nanorod Arraysmentioning

confidence: 99%

Constructing a TiO₂/PDA core/shell nanorod array electrode as a highly sensitive and stable photoelectrochemical glucose biosensor

Yang

Guo

et al. 2020

RSC Adv.

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“…In another example, GOx was successfully entrapped in Nafion and deposited a on a rutile nanorod/anatase nanowire TiO 2 /FTO photoelectrode [51]. The use of these TiO 2 phases (rutile and anatase) improved the PEC glucose biosensor performance as this structure facilitated the loading of the enzyme and favored the transport of electrons from the conduction band on anatase TiO 2 to that of rutile TiO 2 .…”

Section: Glucose Detectionmentioning

confidence: 99%

Enhancement of Biosensors by Implementing Photoelectrochemical Processes

Barrio

Luna-López

Pita

2020

Sensors

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Research on biosensors is growing in relevance, taking benefit from groundbreaking knowledge that allows for new biosensing strategies. Electrochemical biosensors can benefit from research on semiconducting materials for energy applications. This research seeks the optimization of the semiconductor-electrode interfaces including light-harvesting materials, among other improvements. Once that knowledge is acquired, it can be implemented with biological recognition elements, which are able to transfer a chemical signal to the photoelectrochemical system, yielding photo-biosensors. This has been a matter of research as it allows both a superior suppression of background electrochemical signals and the switching ON and OFF upon illumination. Effective electrode-semiconductor interfaces and their coupling with biorecognition units are reviewed in this work.

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Enhanced photoeletrochemical biosensing performance from rutile nanorod/anatase nanowire junction array

Cited by 26 publications

References 29 publications

Construction of the Rutile/Anatase Micro-Heterophase Junction Photocatalyst from Anatase by Liquid Nitrogen Quenching Method

Construction of the Rutile/Anatase Micro-Heterophase Junction Photocatalyst from Anatase by Liquid Nitrogen Quenching Method

Constructing a TiO₂/PDA core/shell nanorod array electrode as a highly sensitive and stable photoelectrochemical glucose biosensor

Enhancement of Biosensors by Implementing Photoelectrochemical Processes

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Enhanced photoeletrochemical biosensing performance from rutile nanorod/anatase nanowire junction array

Cited by 26 publications

References 29 publications

Construction of the Rutile/Anatase Micro-Heterophase Junction Photocatalyst from Anatase by Liquid Nitrogen Quenching Method

Construction of the Rutile/Anatase Micro-Heterophase Junction Photocatalyst from Anatase by Liquid Nitrogen Quenching Method

Constructing a TiO2/PDA core/shell nanorod array electrode as a highly sensitive and stable photoelectrochemical glucose biosensor

Enhancement of Biosensors by Implementing Photoelectrochemical Processes

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Constructing a TiO₂/PDA core/shell nanorod array electrode as a highly sensitive and stable photoelectrochemical glucose biosensor