CRYSTENGCOMM
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2022
·Vol. 24
·期 9
·1789-1794
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IF 3.756
Yanan Zhang,Shujie Jiao,Junhua Zhang,Shuo Liu,Dongbo Wang,Shiyong Gao,Jinzhong Wang
A GaOOH/Ga2O3 heterojunction was obtained by a one-step annealing treatment at a certain temperature. The solar blind photoresponse performance of the GaOOH/Ga2O3 heterojunction was characterized through photoelectrochemical detectors, providing a simple and effective method for pure solar-blind ultraviolet detection. The results showed that the maximum responsivity of the α-GaOOH/α-Ga2O3 heterojunction detector is 0.29 mA W−1 at 250 nm, which is 370% and 145% higher than that of the α-GaOOH and α-Ga2O3 detectors, respectively. The calculated solar-blind/visible detection ratio and light-to-dark current ratio of the detector are also significantly improved compared with the α-Ga2O3 and α-GaOOH detectors, reflecting better pure solar-blind ultraviolet detection performance. The photoresponse mechanism has been studied systemically.
研究领域:
材料科学
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 8
·4286-4292
·
IF 3.119
Panqi Huang,Jingfei Luan
In this work, a GaOOH/ZnBiTaO5 heterojunction photocatalyst was synthesized innovatively and characterization techniques including XRD, SEM-EDS, XPS, FT-IR, PL and UV-Vis DRS were carried out to analyse the structural and morphological properties of the GaOOH/ZnBiTaO5 heterojunction photocatalyst. The GaOOH is dispersed on the surface of ZnBiTaO5 to form a heterojunction structure according to the SEM image. The band gaps of 10 wt%, 25 wt% and 50 wt% GaOOH/ZnBiTaO5 heterojunction photocatalysts were calculated to be 3.21 eV, 3.22 eV and 3.23 eV, respectively, which were between the band gaps of pure ZnBiTaO5 (3.19 eV) and pure GaOOH (4.76 eV). The photocatalytic performance of the GaOOH/ZnBiTaO5 heterojunction photocatalyst was investigated by degrading enrofloxacin under ultraviolet light. The results showed that the as-prepared 25 wt% GaOOH/ZnBiTaO5 presented optimal photocatalytic performance and could remove 58.27% of enrofloxacin in 60 min, which was higher than that of pure ZnBiTaO5 (53.7%) and pure GaOOH (35.4%). In addition, it was confirmed that ˙O2−, h+ and ˙OH were all the active radicals during the degradation process. Finally, the possible degradation mechanism of enrofloxacin was discussed in detail. This work provided a viable strategy for improving the photocatalytic performance of wide band gap semiconductors.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 55
·32027-32033
·
IF 3.049
Panqi Huang,Jingfei Luan
A GaOOH/ZnBiNbO5 composite was constructed by loading dispersed GaOOH rods on the surface of ZnBiNbO5 particles and characterizations, including SEM-EDS, XRD, FT-IR spectroscopy, XPS, and UV-Vis DRS, were performed to analyze the morphology, structure and optical properties of the GaOOH/ZnBiNbO5 composite. The characterization results showed that ZnBiNbO5 was not destroyed by a high temperature and high pressure in the solvothermal process and that GaOOH was successfully dispersed on the surface of ZnBiNbO5. Simultaneously, there was a red-shift of the absorbance edge for GaOOH/ZnBiNbO5 compared with those of pure ZnBiNbO5 and pure GaOOH. The band gaps of ZnBiNbO5, GaOOH and GaOOH/ZnBiNbO5 were calculated to be 2.96 eV, 4.76 eV and 2.93 eV, respectively. The photocatalytic activity of GaOOH/ZnBiNbO5 was explored by degrading enrofloxacin under illumination. After ultraviolet light irradiation for 60 min, the removal rate of enrofloxacin with GaOOH/ZnBiNbO5 as a photocatalyst was 15.11% higher than that of pure ZnBiNbO5 and was 29.29% higher than that of pure GaOOH. In addition, the contribution of the free radicals in the photocatalytic process was confirmed to be ·O2− > ·OH > h+. The construction of the GaOOH/ZnBiNbO5 composite improved the performance of the single ZnBiNbO5 photocatalyst and single GaOOH photocatalyst, thereby increasing their practical application potential.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2020
·Vol. 44
·期 6
·2414-2422
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IF 3.288
Panqi Huang,Jingfei Luan
A highly efficient Ag3PO4/GaOOH composite was innovatively prepared and its photocatalytic performance was evaluated through degrading rhodamine B (RhB) under illumination, in this paper. Characterizations including XRD, SEM-EDS, TEM, FT-IR, XPS, UV-Vis DRS, PL and EPR were performed to analyze the properties of the Ag3PO4/GaOOH composite. The SEM-EDS results indicated that Ag3PO4 particles were dispersed on the surface of GaOOH sticks. The (210) plane of Ag3PO4 particles and the (200) plane of GaOOH sticks were simultaneously observed in the TEM results. UV-Vis DRS analysis indicated that the spectrum of the Ag3PO4/GaOOH composite showed a significant red shift compared to that of pure GaOOH. PL spectra also indicated that the construction of the Ag3PO4/GaOOH composite significantly declined the recombination rate of photogenerated electrons-hole pairs. The photocatalytic degradation experiments showed that the 30 wt% Ag3PO4/GaOOH composite demonstrated excellent performance under illumination. After a reaction time of 60 min, the decolorization rate of RhB was up to 97.83% using the 30 wt% Ag3PO4/GaOOH composite. Further studies confirmed that the 30 wt% Ag3PO4/GaOOH composite had good stability and the contribution of active species during degradation was of the order h+ > ˙O2− > ˙OH. The results of this study would provide a new perspective for improving the applications of wide band gap semiconductors, particularly for light-induced degradation.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2021
·
IF 6.057
Jing Ru,Xuemei Wang,Xinglan Cui,Fangbing Wang,Hong Ji,Xinzhen Du,Xiaoquan Lu
Heavy metal pollution in the environment poses a serious threat to the ecosystem and human health, which has attracted widespread attention. In this study, an octahedral structure composite composed of UiO-66-NH 2 MOFs and semiconductor GaOOH materials has been prepared and used as electrode materials successfully. These composites can be used for the real-time and online determination of Cd 2+ , Cu 2+ , Hg 2+ , and Pb 2+ in real water samples simultaneously or alone via an electrochemical method. Zr-MOF has a large and unique surface area that is beneficial to the adsorption and preconcentration of heavy metal ions . The experiment parameters such as pH, deposition potential, and deposition time were optimized. Under the optimized conditions, the electrochemical performances and practical applications of Zr-MOF composites modified electrode have been investigated, which shows excellent wider linear range and lower detection limit (LOD). The results demonstrated excellent selectivity, reproducibility, stability and applicability for the detection of four metal ions. These superior features stem from the synergistic reaction mechanism of UiO-66-NH 2 and GaOOH. In addition, it has been established a new detection strategy for heavy metal ions through the form of metal-organic framework (MOF) composite in this work. It may provide a novel platform for the quantitative determination of heavy metal ions in various environmental samples.
研究领域:
环境科学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
·
IF 4.1
Ting Yu,Ying Liang,Zejun Zhou,Fengjie Chen,Yingjun Wang,Yunjun Mei,Mengxi Cao,Bolei Chen,Pu Wang,Yawei Wang
The photocatalytic generation of hydrogen peroxide (H 2 O 2 ) using artificial synthetic methods is promising. However, the sluggish hole-induced water oxidation half-reaction that hinders charge separation severely limits H 2 O 2 generation efficiency. This study used the oxidation half-reaction of tetracycline (C 22 H 24 N 2 O 8 , TC) to accelerate charge separation over GaOOH/In(OH) 3 composites with Type II heterojunctions under sunlight irradiation to increase the H 2 O 2 generation efficiency. The results demonstrated that the H 2 O 2 generation efficiency significantly increased from 74.7 to 389.8 µmol L −1 h −1 as the TC degradation efficiency increased from 0.02 to 0.37 mg L −1 h −1 . Radical quenching experiments further indicated that TC degradation consumed holes, increasing the electron formation rate and enhancing H 2 O 2 generation. A comparison with density functional theory calculations revealed that H 2 O 2 generation was a one-step 2-electron route (O 2 + 2e − + 2H + → H 2 O 2 ). These findings are expected to provide new strategies for promoting photocatalytic synthesis of H 2 O 2 .
研究领域:
环境科学
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化学
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材料科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2022
·
IF 4.132
Xiaofei Li,Xin Ding,Yuhang Du,Chao Xiao,Kang Zheng,Xianglan Liu,Xingyou Tian,Xian Zhang
Liquid metals (LMs) are playing an increasingly important role in the fields of flexible devices, electronics, and thermal management due to their low melting point and excellent thermal and electrical conductivity, and the transformation of LMs in deionized water has recently received much attention. In this paper, we investigate the transformation process of EGaIn microspheres in deionized water and propose a two-step process of microspherical transformation, whereby the microspheres are first deformed into a spindle shape and then into lamellar nanorods. It is also shown that the growth of GaOOH crystals drives the transformation. Based on this result, EGaIn microspheres with controllable transformation could be prepared, such as spindle or lamellar rod shapes, extending the application area of LMs.
研究领域:
材料科学
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纳米技术
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 35
·19930-19939
·
IF 3.049
Panqi Huang,Jingfei Luan
The effects of Ba-doping on the structure and photocatalytic performance of GaOOH were investigated for the first time in this paper. XRD, SEM, TEM, XPS, UPS, FT-IR, UV-Vis DRS, PL, BET and EPR characterizations were carried out to analyze the properties of Ba-doped GaOOH. The results showed that GaOOH crystallized well with the orthorhombic crystal system with space group Pbnm. The lattice parameters of GaOOH were found to be a = 4.509526 Å, b = 9.771034 Å and c = 2.969284 Å. The transition in the structural morphology of GaOOH before and after Ba-doping was observed in SEM pictures in which the morphology of GaOOH varied from wood-like to rice husk-like. At the same time, the specific surface area of 4 wt% Ba-doped GaOOH (21.5854 m2 g−1) was 3.42 times that of pure GaOOH (6.3047 m2 g−1). Ba-doping caused a red shift of the band gap according to UV-Vis DRS results. The enhanced defect states caused by Ba-doping was confirmed by PL results, which decreased the recombination rate of photogenerated electrons and photogenerated holes. Compared with pure GaOOH, when GaOOH with different Ba content was used as photocatalyst, the removal rate of enrofloxacin was increased by more than 20% only by illumination for 60 min. In addition, Ba-doped GaOOH had excellent stability and could be reused, which could reduce costs and increase the potential of its practical application.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）