MATERIALS LETTERS
·
2011
·
IF 2.12
Peisong Tang,Haifeng Chen,Feng Cao
Bismuth Tungstate (Bi 2 WO 6 ) nanodisks were synthesized using Bi (NO 3 ) 3 ·5H 2 O and Na 2 WO 4 ·2H 2 O as starting materials by a one-step hydrothermal process in the presence of ethylene glycol. The prepared sample was characterized by powder X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), Brunauer–Emmett–Teller (BET) measurement, Fourier transform infrared spectroscopy (FTIR) and UV–visible diffuse reflectance spectrum (DRS). The prepared Bi 2 WO 6 nanodisks consist of fine particles and possess an optical band gap of 2.76 eV. The photocatalytic experiment demonstrates that the prepared Bi 2 WO 6 nanodisks exhibit high photocatalytic activity for decomposition of Rhodamine B under visible-light, which is ascribed to the unique shaped structures as well as narrow optical band gap.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Semiconductors
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2016
·Vol. 37
·期 8
·083004
·
IF 0
Ying Wu,Jing Wang,Yunfang Huang,Yuelin Wei,Zhixian Sun,Xuanqing Zheng,Chengkun Zhang,Ningling Zhou,Leqing Fan,Jihuai Wu
Novel, three-dimensional, flower-like Bi2O3/BiVO4 heterojunction photocatalysts have been prepared by the combination of homogeneous precipitation and two-step solvothermal method followed by thermal solution of NaOH etching process. The as-obtained samples were fully characterized by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, Brunauer-Emmett-Teller surface area, and UV—vis diffuse-reflectance spectroscopy in detail. The crystallinity, microstructure, specific surface area, optical property and photocatalytic activity of samples greatly changed depending on solvothermal reaction time. The photocatalytic activities of samples were evaluated on the degradation of methyl orange (MO) under visible-light irradiation. The Bi2O3/BiVO4 exhibited much higher photocatalytic activities than pure BiVO4 and conventional TiO2 (P25). The result revealed that the three-dimensional heterojunction played a critical role in the separation of the electron and hole pairs and enhancement of the interfacial charge transfer efficiency, which was responsible for the enhanced photocatalytic activity.
研究领域:
材料科学
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环境科学
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DOI
ChemPhotoChem
·
2016
·Vol. 1
·期 2
·60-69
·
IF 0
Erwei Huang,Xiaolong Yao,Weichao Wang,Guangjun Wu,Naijia Guan,Landong Li
Graphical The sides face off : SnS 2 nanoplates dominated by {101} or {100} exposed facets are successfully prepared through a simple hydrothermal method and their facet-dependent band-energy diagrams are confirmed by combining spectroscopic analysis and theoretical calculations. Accordingly, SnS 2 nanoplates dominated by different exposed facets exhibit quite different photo-catalytic behaviours in target reactions. A facile hydrothermal strategy is developed for the synthesis of SnS 2 nanoplates with specific exposed facets. The crystallographic structure and the specific exposed facets of as-prepared SnS 2 are confirmed by X-ray diffraction, Raman spectroscopy and TEM analysis, and the surface electronic state and the chemical composition of samples are investigated by X-ray photoelectron spectroscopy (XPS). The band gaps of SnS 2 nanoplates are directly measured from UV/Vis absorption spectra, and their detailed band alignments are determined by Mott–Schottky plots and ultraviolet photoelectron spectroscopy (UPS) analysis, which are well supported by DFT calculations. Significant transient photocurrent responses under visible-light irradiation from photoelectrochemical analysis reveal that SnS 2 samples are active and stable visible-light-driven photocatalysts and that SnS 2 nanoplates dominated by {101} exposed facets should be better photocatalysts than those dominated by {100} exposed facets. The photocatalytic activities of SnS 2 nanoplates are examined in two typical reactions, that is, rhodamine B (RhB) degradation and hydrogen production from water splitting. As expected, SnS 2 nanoplates dominated by {101} exposed facets exhibit distinctly higher activity than those dominated by {100} exposed facets in the photocatalytic RhB degradation. For hydrogen production from water splitting, SnS 2 nanoplates dominated by {101} exposed facets exhibit significant photocatalytic activity resulting from their suitable band edges to realize the photocatalytic redox reaction, in great contrast to the inactive SnS 2 nanoplates dominated by {100} exposed facets.
研究领域:
材料科学
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化学
✓ 已验证
DOI
MATERIALS LETTERS
·
2015
·
IF 2.489
Dongdong Lv,Dafeng Zhang,Xipeng Pu,Meichao Gao,Huiyan Ma,Huaiyong Li,Tongtong Zhang
Li 8 Bi 2 (MoO 4 ) 7 was synthesized by a one-step combustion method. The structure, morphology, adsorbance, optical and photocatalytic properties of as-obtained sample were studied by X-ray powder diffraction, scanning electron microscopy, ultraviolet–visible spectrophotometry. The experimental results show that the formation of tetragonal Li 8 Bi 2 (MoO 4 ) 7 was one-pot achieved. The sample exhibits a irregular particle morphology with an average size of ~0.6 μm. The direct energy band gap calculated from the diffuse reflectance spectrum is 3.25 eV. Compared with TiO 2 (P25), as-synthesized Li 8 Bi 2 (MoO 4 ) 7 shows better visible light photodegradation performance for MB, which can be attributed to its excellent adsorbability.
研究领域:
材料科学
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光催化
·
化学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 6
·427
·
IF 3.504
Meiyin Wang,Hui Wang,Yuanhang Ren,Cheng Wang,Zhewei Weng,Bin Yue,Heyong He
A series of composites consisting of g-C3N4sheet and mesoporous Nb2O5(mNb2O5) microsphere were fabricated by in situ hydrolysis deposition of NbCl5onto g-C3N4sheet followed by solvothermal treatment. The samples were characterized using powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), N2adsorption-desorption, X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS) and photoluminescence spectroscopy (PL). The photocatalytic activity of the composites was studied by degradation of rhodamine B (RhB) and tetracycline hydrochloride (TC-HCl) in aqueous solution under visible light irradiation (λ> 420 nm). Compared with g-C3N4and mNb2O5, g-C3N4-mNb2O5composites have higher photocatalytic activity due to synergistic effect between g-C3N4and mNb2O5. Among these composites, 4% g-C3N4-mNb2O5has the highest efficiency and good recyclability for degradation of both RhB and TC-HCl.Keywords:photocatalytic degradation;g-C3N4;mesoporous Nb2O5;organic pollutant
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2025
·
IF 4.6
Rahman I. Mahdi,Mohammed A. Ibrahem,Amar Al-Keisy,Shihab A. Zaidan,W.H. Abd Majid
Bismuth heterojunction nanocomposites of BiTaO 4 nanoplates and BiVO 4 nanostructures were successfully prepared to enhance the photocatalytic performance of two cationic dyes: methylene blue (MB) and rhodamine B (RhB). The heterostructured nanocomposite of BiTaO 4 /BiVO 4 demonstrates a specific surface area of 15.32 m 2 /g, achieving a two-fold increase over the 6.4 m 2 /g surface area of pure BiTaO 4 nanoplates. Mott-Schottky and UV–Vis measurements reveal the narrowing of the optical band gap of the newly fabricated heterostructure nanocomposites to 2.5 eV, enabling efficient charge generation and separation capabilities. The heterostructure nanocomposite of BiTaO 4 /BiVO 4 exhibits an enhanced degradation time constant of 0.098 min −1 for MB, which is 97 % faster than that of pure BiTaO 4 nanoplates at 0.002 min −1 . For RhB dye, a 57 % enhancement in the photodegradation time constants was recorded for BiTaO 4 /BiVO 4 with 0.045 min −1 compared to 0.019 min −1 for the pure BiTaO 4 nanoplates. The improved photocatalytic performance is attributed to efficient visible light absorption and effective charge generation and separation at the heterojunction active sites formed on the surface of BiTaO 4 nanoplates, as revealed by temporal response measurements. The transient photoresponse of BiTaO 4 /BiVO 4 nanocomposite shows faster time constants, with rise and decay times of τ R = 0.42 s and τ D 1 = 0.41 s, τ D 2 = 49.5 s, respectively. In comparison, the pure BiTaO 4 nanoplates exhibit rise times of τ R 1 = 0.46 s and τ R 2 = 6.36 s, while their decay times are τ D 1 = 0.72 s and τ D 2 = 15.73 s, where τ R and τ D are the rise and decay time constants, respectively. The heterostructure nanocomposites exhibit a higher photocurrent density of 0.65 µA/cm 2 , compared to 0.35 µA/cm 2 for pure BiTaO 4 . This study provides valuable insights into photocatalysis reaction enabled by a novel heterojunction formation between BiTaO 4 and BiVO 4 .
研究领域:
材料科学
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光催化
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环境功能材料
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纳米材料
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物理化学
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表面科学
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能源与环境技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Lu Han,Yufeng Luo,Rongfeng Zhang,Yunxia Chan,Qianling Cui,Lidong Li
Herein, we reported the fabrication of a core-shell-structured iron oxyhydroxide ( β -FeOOH) nanocomposite, which possessed good near-infrared (NIR) light-triggered photothermal conversion capacity for efficient antibacterial application. The nanocomposite was composed of a shuttle-shaped β -FeOOH nanocrystal core protected by the surrounding carboxyl maltodextrin (CMD) shell modified with green-emissive naphthalic anhydride (NA) dyes, thus named as FeOOH@CMD-NA. The inner β -FeOOH core possessed an average length of 19.0 ± 2.5 nm and a diameter of 6.4 ± 1.6 nm, while the mean size of FeOOH@CMD-NA was 35 ± 8.5 nm. Under an 808 nm laser irradiation, the nanocomposite displayed a good photothermal conversion performance with an efficiency of 40.9 %. The fluorescence experiment proved the effective binding behavior of nanocomposites with Escherichia coli ( E. coli ). Subsequently, the exposure to 808 nm light can efficiently inhibit the growth rate of E. coli via the photothermal effect generated by β -FeOOH nanocrystals. Therefore, we provided a low-cost and efficient photothermal agent for fluorescence imaging-guided elimination of microbial infections.
研究领域:
纳米医学
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生物材料学
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微生物学
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光热治疗
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分子影像学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2025
·
IF 5.6
Zipeng Wu,Haofeng Luo,Zhongliang Zou,Maodan Yuan,Yan Chen,Xuanrong Ji
PZT-8 ceramics exhibit outstanding performance in sensor applications owing to their superior piezoelectric properties. Nevertheless, conventional dense PZT-8 ceramics are subject to certain limitations, including high acoustic impedance and relatively low energy conversion efficiency, which restrict their broader application potential. Porous architectures offer a viable solution by enabling controlled porosity, thereby improving acoustic matching and enhancing energy harvesting efficiency. Although 3D printing presents a cost-effective method for fabricating complex ceramic geometries, ultraviolet (UV) light-based photopolymerization techniques have encountered challenges in processing PZT-8 ceramics due to their strong UV absorption characteristics. To address this limitation, this study introduces a novel strategy by incorporating non-absorbent polymethyl methacrylate (PMMA) into the formulation of high-performance porous PZT-8 piezoelectric ceramics tailored for digital light processing (DLP)-based 3D printing. Systematic investigations demonstrate that increasing PMMA content (5 wt% to 25 wt%) positively influences curing depth while simultaneously affecting microstructure and electrical properties. The experimental results show d 33 values ranging from 176 to 272 pC/N, k t values from 35.84% to 46.55%, Z values from 18.13 to 22.22 MRayls, FOM values from 8.92 to 10.55 × 10 -12 m 2 /N, and HFOM values from 3.47 to 4.40 × 10 -12 m 2 /N.
✓ 已验证
产品关联
DOI
高影响因子
Sustainability
·
2025
·Vol. 17
·期 22
·
IF 3.3
Jingfei Luan,Zhe Li,Ye Yao,Jian Wang,Liang Hao
This study presented the successful synthesis of a visible light responsive Z-scheme BiTmDySbO7/BiEuO3heterojunction photocatalyst (BBHP) via the hydrothermal method, exhibiting outstanding removal efficiency for degrading the metronidazole (MNZ) in wastewater. The BBHP exhibited exceptional photocatalytic activity during the degradation process of the MNZ which was a widely detected pharmaceutical pollutant in aquatic environments. The key to the high photocatalytic activity of the BBHP was the formation of a Z-scheme photogenerated carrier transport channel which existed between BiTmDySbO7and BiEuO3within the heterojunction structure. This innovative structural design was experimentally confirmed for enhancing the separation efficiency of the photogenerated charge carriers significantly, thereby, the efficient photocatalytic activity of the BBHP was promoted. After visible light irradiation for 130 min, the BBHP achieved a removal efficiency of 99.56% for degrading MNZ and a mineralization rate of 98.11% for removing the total organic carbon (TOC) concentration. In contrast to a single photocatalyst, the removal rate of the MNZ by using the BBHP was 1.14 times that by using the BiEuO3, 1.26 times that by using the BiTmDySbO7, and 2.65 times that by using the nitrogen-doped TiO2(N-T) under visible light irradiation. The mineralization rate for removing the TOC concentration during the degradation process of the MNZ by using the BBHP was 1.17 times that by using the BiEuO3, 1.29 times that by using the BiTmDySbO7, and 2.86 times that by using the N-T under visible light irradiation. The photocatalytic degradation process of the MNZ by using the BBHP followed first-order kinetics model, concurrently, a dynamics rate constant of 0.0345 min−1was obtained. Furthermore, the BBHP demonstrated excellent stability and durability in accordance with multiple cyclic degradation experiments. According to the capturing radicals experiments and the electron paramagnetic resonance test experiments, it was determined that the hydroxyl radicals (•OH) and the superoxide anions (•O2−) played key role during the photocatalytic degradation process of the MNZ by using the BBHP under visible light irradiation. Finally, the intermediate products that were produced during the degradation process of the MNZ were analyzed by using liquid chromatography-mass spectrometer, as a result, a potential degradation pathway for the MNZ was proposed. Overall, this study could provide valuable references for future research on composite photocatalysts and effectively maintain the safety and sustainable utilization of water resource.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Zhiguo Cheng,Kui Cheng,Wenjian Weng
Light-induced cell detachment shows much potential in in vitro cell culture and calls for high-performance light-responsive films. In this study, a smooth and dense SiO2/TiO2 nanocomposite thin film with thickness of around 250 nm was first fabricated on H2O2 treated polystyrene (PS) substrate via a low-temperature sol–gel method. It was observed that the film could well-adhere on the PS surface and the bonding strength became increasingly high with the increase of SiO2 content. The peeling strength and shear strength reached 3.05 and 30.02 MPa, respectively. It was observed the surface of the film could transform into superhydrophilic upon 20 min illumination of ultraviolet with a wavelength of 365 nm (UV365). In cell culture, cells, i.e., NIH3T3 and MC3T3-E1 cells, cultured on SiO2/TiO2 nanocomposite film were easily detached after 10 min of UV365 illumination; the detachment rates reached 90.8% and 88.6%, respectively. Correspondingly, continuous cell sheets with good viability were also easily obtained through the same way. The present work shows that SiO2/TiO2 nanocomposite thin film could be easily prepared on polymeric surface at low temperature. The corresponding film exhibits excellent biocompatibility, high bonding strength, and good light responses. It could be a good candidate for the surface of cell culture utensils with light-induced cell detachment property.
研究领域:
材料科学
·
生物医学工程
·
细胞生物学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Guangyao Cheng,Kuan-Ting Lin,Yinghua Ye,Hang Jiang,To Ngai,Yi-Ping Ho
The past decade has witnessed a significant development of droplet microfluidics for applications such as directed evolution and single-cell analysis. While the stability and manipulation of droplets are part of the prerequisites to further their applications, most of the currently available surfactants serve solely as stabilizers between the interfaces of water and oil. In this study, we present a novel type of photo-responsive fluorosurfactant based on fluorinated plasmonic nanoparticles (NPs). The demonstration by fluorinated gold–silica core–shell NPs (f-Au@SiO2) has been shown to be effective in stabilizing the water-in-fluorocarbon oil droplets. More importantly, the photothermal response enabled by the f-Au@SiO2 has been shown to be promising for the movement of droplets as well as the alteration of interfacial stability. The unique photo-responsiveness provided by the plasmonic NPs is expected to gear up the droplet microfluidics with an “active” surfactant for reconfigurable optical manipulation.
研究领域:
材料科学
·
化学工程
·
微流控技术
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2022
·
IF 4.889
Kun Wang,Xun Zhu,Rong Chen,Dingding Ye,Yang Yang,Qiang Liao
In this work, Ag nanoparticles as surface plasmon catalysts were prepared on polydopamine microspheres via in-situ reduction for catalytic 4-nitrophenol to 4-aminophenol in the presence of sodium borohydride. The kinetics of catalytic reaction under light and dark conditions was compared. It was found that the reaction rate constant under light condition was increased by 53.6% due to the surface plasmon resonance effect. The transition state theory was used to reveal the enhanced mechanism of catalytic conversion of 4-nitrophenol under light condition. It is demonstrated that the light-excited high-energy electrons are responsible for the shift of the adsorbed reactants to the excited state with higher potential energy, lowering the apparent activation energy from 47.2 kJ/mol to 32.6 kJ/mol and thereby enhancing the conversion of 4-nitrophenol to 4-aminophenol. This study offers a deep insight into the contribution of surface plasmon resonance to catalytic conversion of 4-nitrophenol by surface plasmon catalysts.
研究领域:
化学
·
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）