Multifunctional property exploration: Bi4O5I2 with high visible light photocatalytic performance and a large nonlinear optical effect

Yin, Ruonan; Li, Yang; Zhong, Kangdi; Yao, Hang; Zhang, Yamin; Lai, Kangrong

doi:10.1039/c8ra08984a

Cited by 24 publications

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“…The Kubelka–Munk transformation and Tauc method were introduced to estimate the energy gap of Sb 5 O 7 I. The result suggests a direct energy gap of 3.22 eV, compatible with the crystals’ transparent color (Figure a), which is far higher than the energy gaps of other metal oxyhalides, like CuSb 2 O 3 Cl (2.74 eV), CuSb 2 O 3 Cl (2.64 eV), Sb 3 O 4 I (2.16 eV), Sb 8 O 11 I 2 (2.74 eV), BiOI (1.83 eV), and Bi 4 O 5 I 2 (2.39 eV) . To our knowledge, Sb 5 O 7 I has the largest energy gap of all reported ternary oxyiodides (Table S6).…”

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confidence: 83%

“…It can be noted that most of these oxyhalides are fluorides, chlorides, and bromides, while iodides are very rare because of their synthetic difficulties. In addition, oxyhalides containing lone-pair cations − or d 0 transition-metal cations − may increase the possibility for obtaining noncentrosymmetric (NCS) structures because of their second-order Jahn–Teller effects. However, most metal oxyhalides are crystallized with centrosymmetric (CS) structures because of the antiparallel arrangement of their asymmetric units .…”

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confidence: 99%

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Sb₅O₇I: Exploration of Ternary Antimony-Based Oxyhalide as a Nonlinear-Optical Material

2022

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Metal oxyhalides are attracting extensive interest for their enchanting structures and diverse properties. Herein, a ternary antimony oxyiodide, Sb 5 O 7 I with the new hexagonal noncentrosymmetric P6 3 structure is systematically surveyed by focusing on its nonlinear-optical (NLO) behavior. Its two-dimensional structure is constructed by {Sb 2 [Sb 3 O 7 ]} ∞ + layers separated by charge-balanced I − anions. The second-harmonic-generation measurement result suggests that Sb 5 O 7 I is NLO-active, and the effect is assigned to the [SbO 3 ] 3− triangular pyramids' contribution. Sb 5 O 7 I shows a direct optical energy gap of 3.22 eV, which is the largest among all reported ternary oxyiodides. This work is the first investigation of ternary NLO Sb-based oxyhalides and enriches the study of metal oxyhalides as promising NLO materials. S econd-order nonlinear-optical (NLO) crystals could realize frequency conversion to extend laser wavelengths and are extensively employed in many fields. 1−9 NLO materials have made significant progress in the visible and UV regions. 10−15 In contrast, famous NLO materials (AgGaS 2 , AgGaSe 2 , 16,17 and ZnGeP 2 18 ) in the IR region cannot meet the market requirements because of their low laser-induced damage thresholds (LIDTs) or double-photon absorption. Hence, it is a continuous challenge to obtain novel IR NLO crystals with balanced comprehensive performances.Recently, NLO materials containing mixed anions have been considered as promising candidates with optimized comprehensive properties. 19−23 Notably, metal oxyhalides, a branch of enormously relevant mixed-anion compounds that have diverse structural features and physical properties, have received rapidly increasing interest.

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confidence: 83%

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Sb₅O₇I: Exploration of Ternary Antimony-Based Oxyhalide as a Nonlinear-Optical Material

2022

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“…35 Yin et al, Hou et al and Xiao et al have reported nanostructured Bi 4 O 5 I 2 successively including nano-akes and nano-roses fabricated via a complicated organic solvent method. [36][37][38] To the best of our knowledge, there has been no report on the synthesis and application of porous Bi 4 O 5 I 2 nanosheets. Herein, we prepared novel mesoporous Bi 4 O 5 I 2 single-crystal nanosheets using a simple one-step method.…”

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Novel mesoporous bismuth oxyiodide single-crystal nanosheets with enhanced catalytic activity

et al. 2020

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“…Pure Bi 4 O 5 I 2 nanosheets were prepared by a solvothermal method, based on the previous report [ 32 ]. Typically, 5 mmol Bi(NO 3 ) 3 ∙5H 2 O and 10 mmol KI powders were dissolved into 80-mL ethylene glycol under continuous stirring for 30 min.…”

Section: Methodsmentioning

confidence: 99%

Boosting Piezo/Photo-Induced Charge Transfer of CNT/Bi4O5I2 Catalyst for Efficient Ultrasound-Assisted Degradation of Rhodamine B

Wang

Liu

et al. 2021

Materials

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Strain-induced internal electric fields present a significant path to boosting the separation of photoinduced electrons and holes. In addition, piezo-induced positive/negative pairs could be released smoothly, taking advantage of the excellent electroconductibility of some conductors. Herein, the hybrid piezo-photocatalysis is constructed by combining debut piezoelectric nanosheets (Bi4O5I2) and typical conductor multiwalled carbon nanotubes (CNT). The photocatalytic degradation efficiency that the hybrid CNT/Bi4O5I2 exhibits was remarkably increased by more than 2.3 times under ultrasonic vibration, due to the piezo-generated internal electric field. In addition, the transient photocurrent spectroscopy and electrochemical impedance measurement reveal that the CNT coating on Bi4O5I2 enhances the piezo-induced positive/negative migration. Therefore, the piezocatalytic activity of CNT/Bi4O5I2 could be improved by three times, compared with pure Bi4O5I2 nanosheets. Our results may offer promising approaches to sketching efficient piezo-photocatalysis for the full utilization of solar energy or mechanical vibration.

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Multifunctional property exploration: Bi₄O₅I₂ with high visible light photocatalytic performance and a large nonlinear optical effect

Abstract: Bi4O5I2 exhibits an extremely high second harmonic generation response and enhanced photocatalytic activity. The multifunction of Bi4O5I2 is mainly resulting from the dipole moment of the stereochemical activity of Bi 6s lone pairs.

Cited by 24 publications

References 50 publications

Sb₅O₇I: Exploration of Ternary Antimony-Based Oxyhalide as a Nonlinear-Optical Material

Sb₅O₇I: Exploration of Ternary Antimony-Based Oxyhalide as a Nonlinear-Optical Material

Novel mesoporous bismuth oxyiodide single-crystal nanosheets with enhanced catalytic activity

Boosting Piezo/Photo-Induced Charge Transfer of CNT/Bi4O5I2 Catalyst for Efficient Ultrasound-Assisted Degradation of Rhodamine B

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Multifunctional property exploration: Bi4O5I2 with high visible light photocatalytic performance and a large nonlinear optical effect

Abstract: Bi4O5I2 exhibits an extremely high second harmonic generation response and enhanced photocatalytic activity. The multifunction of Bi4O5I2 is mainly resulting from the dipole moment of the stereochemical activity of Bi 6s lone pairs.

Cited by 24 publications

References 50 publications

Sb5O7I: Exploration of Ternary Antimony-Based Oxyhalide as a Nonlinear-Optical Material

Sb5O7I: Exploration of Ternary Antimony-Based Oxyhalide as a Nonlinear-Optical Material

Novel mesoporous bismuth oxyiodide single-crystal nanosheets with enhanced catalytic activity

Boosting Piezo/Photo-Induced Charge Transfer of CNT/Bi4O5I2 Catalyst for Efficient Ultrasound-Assisted Degradation of Rhodamine B

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Multifunctional property exploration: Bi₄O₅I₂ with high visible light photocatalytic performance and a large nonlinear optical effect

Sb₅O₇I: Exploration of Ternary Antimony-Based Oxyhalide as a Nonlinear-Optical Material

Sb₅O₇I: Exploration of Ternary Antimony-Based Oxyhalide as a Nonlinear-Optical Material