INORGANIC CHEMISTRY COMMUNICATIONS
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2019
·
IF 1.795
Dongfang Hou,Fan Tang,Bingbing Ma,Min Deng,Xiu-qing Qiao,Dong-Sheng Li
A series of BiYO 3 and rare earth doped BiYO 3 nanotubes have been fabricated through a simple and economical electrospinning technique with subsequent calcination for the first time. The average diameter of the nanotube was approximately 200 nm. It is found that the Nd-doped BiYO 3 nanotubes exhibit an excellent multi-functionality of catalytic and visible-light-driven photocatalytic activities , thus the reduction of 4-Nitrophenol and degradation of Congo red can be rapidly achieved. The enhanced activity was attributed to the one-dimensional tube-like architecture, relatively appropriate band gap and Nd doping, which could be favorable for light harvesting, matter diffusion, and carrier transfer. This work may raise more detail research of BiYO 3 and also broaden its application in many fields.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Nanoscale Research Letters
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2019
·Vol. 14
·期 1
·1-13
·
IF 3.159
Liu Jun,Wu Zhaohui,He Quanguo,Tian Qingyong,Wu Wei,Xiao Xiangheng,Jiang Changzhong
Abstract For an economical use of solar energy, photocatalysts that are sufficiently efficient, stable, and capable of harvesting light are required. Composite heterostructures composed of noble metals and semiconductors exhibited the excellent in catalytic application. Here, 1D Ag/Au/AgCl hollow heterostructures are synthesized by galvanic replacement reaction (GRR) from Ag nanowires (NWs). The catalytic properties of these as-obtained Ag/Au/AgCl hollow heterostructures with different ratios are investigated by reducing 4-nitrophenol (Nip) into 4-aminophenol (Amp) in the presence of NaBH 4 , and the influence of AgCl semiconductor to the catalytic performances of Ag/Au bimetals is also investigated. These hollow heterostructures show the higher catalytic properties than pure Ag NWs, and the AgCl not only act as supporting materials, but the excess AgCl is also the obstacle for contact of Ag/Au bimetals with reactive species. Moreover, the photocatalytic performances of these hollow heterostructures are carried out by degradation of acid orange 7 (AO7) under UV and visible light. These Ag/Au/AgCl hollow heterostructures present the higher photocatalytic activities than pure Ag NWs and commercial TiO 2 (P25), and the Ag/Au bimetals enhance the photocatalytic activity of AgCl semiconductor via the localized surface plasmon resonance (LSPR) and plasmon resonance energy transfer (PRET) mechanisms. The as-synthesized 1D Ag/Au/AgCl hollow heterostructures with multifunction could apply in practical environmental remedy by catalytic manners. Graphical abstract
研究领域:
材料科学
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催化化学
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DOI
PubMed
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 16
·e202500510
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IF 2
Junfei Fang,Hang Yang,Lei Liu,Yuchun Gou,Jianping Deng
Graphical The catalytic and photocatalytic performance of the Copper sulfide (CuS) products prepared by using different copper sources are respectively studied. The catalytic performance of the CuS sample prepared via CuCl 2 as copper source is the best, and when H 2 O 2 is added to form a photo-Fenton catalytic system, it has excellent degradation ability for MB in both dark and light irradiation environments. Copper sulfide (CuS) is a p-type semiconductor material with narrow band gap and easy to be excited by visible light, which makes it has broad application prospect in the field of organic pollutant treatment. This work provides some significant insights into the photo-Fenton catalytic performance of the CuS materials in the degradation of organic dye MB. Via changing the copper source, the catalytic and photocatalytic performances of the CuS products prepared by using different copper sources such as CuSO 4 , Cu(NO 3 ) 2 , CuCl 2 , Cu(C 2 H 3 O 2 ) 2 were studied. The results indicated that due to the difference of copper sources, the catalytic performance of the obtained CuS samples varied greatly. For example, the catalytic properties of the CuS specimens prepared via CuCl 2 and CuSO 4 were significantly better than those of the products prepared using Cu(C 2 H 3 O 2 ) 2 and Cu(NO 3 ) 2 . Meanwhile, the degradation performance of MB by the same CuS specimen is better in a light irradiation condition than in a dark environment. Specifically, the catalytic performance of the CuS sample prepared via CuCl 2 as copper source was the best, and when H 2 O 2 was added to form a photo-Fenton catalytic system, it has excellent degradation ability for MB in both dark and light irradiation environments.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Xiaohua Zheng,Mengnan Xu,Chenbin Cai,Yanhaohan Yuan,Feng Lin,Wei Chen,Fanger Yang
Photocatalysis is a green approach to solving energy and environmental problems, and researchers are still pursuing high-performance photocatalysts . Although BiOX (X = Cl or Br) has a suitable bandgap and good stability, its photoresponse is mostly concentrated in the UV region. Conversely, SnS 2 has a wide photoresponse range but exhibits perceptible photocorrosion and poor stability. To exploit the advantages of both BiOX and SnS 2 , this study hydrothermally synthesized and introduced superfine SnS 2 (∼30 nm in size) into a BiOCl/BiOBr binary system to fabricate BiOCl/BiOBr/SnS 2 composites. Subsequently, the degradation performance of these composites in a Rhodamine B solution under visible light was investigated. Results show that the BiOCl/BiOBr/SnS 2 heterojunctions were successfully prepared and the composites exhibited the best photocatalytic performance with 6% mass fraction of SnS 2 (BiOCl-to-BiOBr mol ratio = 1:1). The formation of a double S-schedule heterojunction between BiOCl/BiOBr and SnS 2 not only accelerated charge separation and transfer but also broadened the photoresponse range and reduced photoelectron–hole recombination under full-spectrum irradiation. Loading a small narrow-bandgap photocatalyst onto a large photocatalyst provides an effective way to construct heterojunctions with excellent photocatalytic performance. The ternary photocatalyst presents a favorable photocatalytic stability, and its photodegradation rate is 4.6, 4.5 and 220.5 times that of BiOCl, BiOBr and SnS 2 , respectively.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
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2012
·Vol. 108
·期 4
·961-965
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IF 1.63
Shao Hao,Zhang Xuebin,Chen Fanyan,Liu Shasha,Ji Yi,Zhu Yajun,Feng Yi
In this paper, smooth α -Fe 2 O 3 nanotubes have been successfully synthesized by electrospinning of ferric nitrate–polyvinyl alcohol solution followed by calcination in air. The morphologies and structures of the samples were characterized by transmission electron microscopy, scanning electron microscopy and X-ray diffraction. The catalytic properties were studied by differential thermal analysis and thermogravimetric analysis. The results indicated that the as-prepared α -Fe 2 O 3 nanotubes showed a continuous morphology and an extremely high degree of crystallization. The average inner and outer diameters of the obtained α -Fe 2 O 3 nanotubes were about 60 nm and 100 nm, respectively. The obtained α -Fe 2 O 3 nanotubes were able to lower the temperature of the high-temperature thermal decomposition of ammonium perchlorate, while they had little effect on the crystallographic phase transformation and the low-temperature thermal decomposition.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2018
·
IF 4.439
Zhongwei Zou,Haiming Xu,Dongya Li,Jingyu Sun,Dongsheng Xia
The 2D BiOCl nanosheets with excellent photocatalytic activity were synthesized via the facile hydrothermal method by regulating the pH value of the precursor solution and using dulcitol (C 6 H 14 O 6 ) as the surfactant. The photocatalysts were characterized by XRD, FT-IR, SEM, TEM, BET, XPS, ESR, O 2 -TPD, EIS, DRS and PL. The results of morphological and structural characterization indicate that the pH has a large effect on the thickness of the nanosheets and the exposure ratio of {0 0 1} facets. The photocatalytic property of the sample prepared at pH 4 showed excellent visible-light photocatalytic performance to degrade RhB owing to the small thickness, the exposed {0 0 1} facets and the optimum concentration of oxygen vacancy. Moreover, the reasonable photocatalytic mechanism was revealed by the active species trapping experiments and ESR characterization, which suggested O 2 − and h + are the main active species in the present system.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Qingyong Tian,Wei Wu,Lingling Sun,Shuanglei Yang,Mei Lei,Juan Zhou,Ying Liu,Xiangheng Xiao,Feng Ren,Changzhong Jiang,Vellaisamy A. L. Roy
Heterogeneous photocatalysis is of great interest for environmental remediation applications. However, fast recombination of photogenerated electron–hole pair and a low utilization rate of sunlight hinder the commercialization of currently available semiconductor photocatalysts. In this regard, we developed a unique ternary single core-double shell heterostructure that consists of α-Fe2O3@SnO2@Cu2O. This heterostructure exhibits a tube-like morphology possessing broad spectral response for the sunlight due to the combination of narrow bandgap and wide bandgap semiconductors forming a p–n heterojunction. To fabricate such a short nanotube (SNT), we used an anion-assisted hydrothermal route for deposition of α-Fe2O3, a seed-mediated deposition strategy for SnO2, and finally an aging process to deposit a Cu2O layer to complete the tube-like ternary α-Fe2O3@SnO2@Cu2O single core-double shell heterostructures. The morphology, composition, and photocatalytic properties of those ternary core–shell–shell heterostructures were characterized by various analytical techniques. These ternary heterostructures exhibited enhanced photocatalytic properties on the photodegradation of the organic dye of Rhodamine B (RhB) under simulated sunlight irradiation. The origin of enhanced photocatalytic activity is due to the synergistic effect of broad spectral response by combining narrow bandgap and wide bandgap semiconductors and, hence, an efficient charge separation of photogenerated electron–hole pairs facilitated through the p–n heterojunction. Furthermore, our unique structure provides an insight on the fabrication and controlled preparation of multilayer heterostructural photocatalysts that have intriguing properties.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Mengyao Xue,Jingwei Han,Xing Dai,Yucai Ge,Yunhua Zhang,Zibin Hai
Cu 2 O–SiC/g-C 3 N 4 composite photocatalysts with excellent photocatalytic performance under visible light were synthesized for the first time via a facile approach combining calcination with hydrothermal reaction. Comprehensive characterization of the synthesized samples encompassing composition, morphology, structure and photoelectric properties was conducted utilizing techniques such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), diffuse reflectance spectroscopy (DRS), photoluminescence spectroscopy (PL), and electrochemical impedance spectroscopy (EIS). Results unequivocally demonstrate successful preparation of the ternary composite through Cu 2 O loading onto SiC/g-C 3 N 4 , evincing markedly elevated activity compared to individual counterparts and binary composites. Notably, in the presence of the prepared Cu 2 O–SiC/g-C 3 N 4 , the degradation rate of methyl orange reached 93.70 % under illumination with a visible LED light rated at 5 W. The notable enhancement in photocatalytic performance of the ternary composites is primarily ascribed to the synergistic effects stemming from the formation of p-n junctions between Cu 2 O and g-C 3 N 4 , alongside the Z-scheme configuration established between Cu 2 O and SiC. Free radical quenching experiments corroborated •O 2 − and h + as the principal redox species mediating the visible light quenching process. This study not only presents a feasible strategy for the fabrication of Cu 2 O-based ternary composites with significantly augmented photocatalytic performance but also delineates a novel avenue for the design and construction of composite photocatalysts facilitating enhanced charge-carrier generation and separation concomitantly.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
·
IF 3.375
Hao Zhang,Hanxiao Zheng,Ying Wang,Runhua Yan,Dingyuan Luo,Wei Jiang
Petal bismuth salt semiconductors are promising as visible-light-driven photocatalysts, but their short service times due to strong oxidation limit their application. In this research, the in situ construction of a p–n heterojunction, by growing BiOX on a KBiO3 surface, is used as a strategy to improve the performance and stability. Evaluation of the photocatalytic degradation of crystal violet and phenol shows that the KBiO3/BiOX (X = Cl, Br, I) heterostructures exhibit significant improvement in photocatalytic performance and stability compared to KBiO3. The best one, KBiO3/(5.85%) BiOI, shows 98% degradation of crystal violet within 20 min, and of phenol within 1.5 h. No significant performance decay can be detected after repeated use. The development of KBiO3/BiOX heterostructure improves the applicability of KBiO3 as an efficient visible-light-driven photocatalyst.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 30
·10046-10056
·
IF 4.099
Xiang Li,Mengyuan Su,Guifen Zhu,Kaige Zhang,Xia Zhang,Jing Fan
In this study, a novel few-layer WS2/Bi2MoO6 heterojunction with greatly enhanced visible light photocatalytic performance was synthesized via a facile hydrothermal method. The results indicated that Bi2MoO6 nanosheets were directly grown on the surface of few-layer WS2 and form plate-on-plate heterojunctions. The synthesized nanocomposites exhibited excellent photocatalytic activity under visible-light irradiation. The optimal composite with 5 wt% WS2 showed the highest photocatalytic activity, whose degradation efficiencies and TOC removal were 99.5% and 91.7% for rhodamine B (RhB), 98.9% and 89.8% for ciprofloxacin (CIP), 76.0% and 67.8% for methylene blue (MB), and 69.3% and 58.6% for methimazole (MMI), respectively. Their excellent photocatalytic performance was predominantly ascribed to the construction of a plate-on-plate heterojunction structure between WS2 and Bi2MoO6, which could promote charge separation efficiency and enhance light harvesting efficiency. The present work provides a new understanding for extending the application of transition-metal dichalcogenides in the field of photocatalysis.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yuanyuan An,Guoxiu Hao,Xinyue Wang,Li Zhou,Mengyao Wu,Jialong Ma,Lien-Yang Chou
In this study, we synthesized CeO2 possessing an open pore structure and verified its structural differences compared to CeO2 lacking such an open pore structure. Using these two CeO2 samples as catalyst supports and loading them with Pd metals, a series of characterizations were carried out on the resultant catalysts to analyze their structures and properties meticulously. We have elucidated the influence of the open pore structure on the loading position of Pd. Hydrogenation reactions involving alkynes and alkenes were employed to confirm the existence of steric hindrance effects caused by the pore structure differences. Furthermore, we applied these catalysts to more valuable industrial reaction systems, demonstrating that the unique pore structures of directly synthesized CeO2 can also exhibit excellent performance in practical applications.
研究领域:
材料科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
·
IF 4.175
Zijie Zhang,Qiao Yin,Linlin Xu,Jiaming Zhai,Chun Guo,Yongqiang Niu,Liwei Zhang,Mingliang Li,Hailong Wang,Li Guan,Rui Zhang,Hongxia Lu
The construction of new semiconductor photocatalysts toward the enhancement of photocatalytic activity under visible-light is crucial for a sustainable and clean future. In this paper, cation doping and heterojunction construction were synergistically used to synthesize g-C 3 N 4 matrix composite with a narrow band gap and low recombination rate of photogenerated electron-hole pairs. Potassium-doped-C 3 N 4 (KCN) was used as the matrix to construct semiconductor heterojunction with Cd 0.5 Zn 0.5 S (CZS) by hydrothermal method . The resulting composites were characterized through X-ray diffraction, infrared radiation, X-ray photoelectron spectroscopy, field-emission scanning electron microscopy, and ultraviolet–visible diffuse reflectance spectroscopy techniques to examine its phase structure, morphological, valance state and optical properties respectively. The photocatalytic performance of the samples evaluated by H 2 evolution and degrading the Rhodamine B (RhB) aqueous solution. After 12 h hydrothermal reaction at 140 °C, CZS particles uniformly distributed on the KCN matrix. The photocatalytic hydrogen production rate (HPR) of the sample loaded 24 wt% CZS (KCN/CZS 24 wt%) reaches 1.83 mmol/g·h which is 5.6 times of pristine g-C 3 N 4 . The degradation rate constant on RhB of KCN/CZS 24 wt% is ( k = 0.041 min −1 ) 7.9 times higher than g-C 3 N 4 . The enhanced photocatalytic activity can be attributed to the well-matched energy level of KCN and CZS as well as the extended light absorption of the composites.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
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