JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Dekun Shi,Zhaojun Shi,Lixin Zhang,Yaan Cao
This study presents a novel fluorine and iodine co-doped Bi 2 MoO 6 (Bi 2 MoO 6 –F–I) photocatalyst prepared using a solvothermal method . The photocatalytic performance of Bi 2 MoO 6 –F–I in N 2 photocatalytic reduction to NH 3 is considerably enhanced compared to that of pristine Bi 2 MoO 6 . The experimental findings and theoretical calculations reveal that F − substitute lattice O 2− in Bi 2 MoO 6 , creating a -Mo-F-Mo- configuration, while I − modifies the surface, forming -Bi-I species in Bi 2 MoO 6 –F–I, which serve as high-adsorption centres and active surface sites, facilitating N 2 and H 2 O molecule adsorption and activation on the surface. The synergistic effect of F − doping and -Bi-I surface species optimizes the band structure of Bi 2 MoO 6 –F–I, aligning more effectively with the redox potential of N 2 photoreduction, which consequently promotes photogenerated carrier separation and redox capability. The remarkable improvement in the photocatalytic performance of Bi 2 MoO 6 –F–I in N 2 photoreduction to NH 3 lays foundation for designing and fabricating high-performance Bi 2 MoO 6 -based photocatalysts.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
CRYSTAL RESEARCH AND TECHNOLOGY
·
2021
·Vol. 56
·期 8
·2100004
·
IF 1.639
Rui Sun,Haixia Li,Yimin Guan,Yong Du,Hui Shen,Jiayue Xu
Lead halide perovskites display remarkable optoelectronic properties, like large absorption coefficients, high photoluminescence quantum efficiencies, and long lifetime and diffusion length of photocarriers. This system is easily fabricated using solution processes and inkjet printing is an effective way to prepare halide perovskite films and complex patterns. In this work, the crystallization behaviors of inkjet printing CH 3 NH 3 PbBr 3 crystals are systematically investigated with varied I − doping, printing times, and solvents. Using N , N -dimethylformamide (DMF) solvent, CH 3 NH 3 PbBr 3− x I x ( x = 0, 0.14, 0.29, 0.45, 0.59) are printed on the glass and the crystalline grains are developed from the (001) oriented tetragonal in side length of 10–50 µm to dendrite with increasing I − concentrations. The crystalline grains are kept tetragonal, while the average crystal size changes from 22 to 89 µm by increasing the number of printing from 10 to 1000 times. DMF and dimethyl sulfoxide (DMSO) are used as solvents for printing CH 3 NH 3 PbBr 3 , and more regular grains are obtained from DMF solvent. Several patterns are printed on glass and papers, and fluorescent two-dimensional (2D) patterns are observed under the 480 nm excitation. The as-printed patterns show excellent homogeneity and high reproducibility, indicating that the inkjet printing shows broad application prospects in flexible electronics.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Beibei Wang,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jinghui He,Jianmei Lu
We report an unique 2D/2D Iodine doped BiOIO 3 /g-C 3 N 4 heterojunction was successfully prepared. The iodine doped BiOIO 3 was prepared by a simple solvent exchange method and combined with g-C 3 N 4 by solvothermal method . The prepared photocatalyst has potential application value in the future due to its excellent stable cycle property. BiOIO 3 nanoplates and g-C 3 N 4 nanosheets form a close interfacial contact directly, so the catalyst has higher charge transport efficiency and wide visible range due to the introduction of iodide ions. Synergistic heterojunction exhibits strong photocatalytic activity for degradation of NO at ppb-level under visible light , of which 30% Iodine doped BiOIO 3 /g-C 3 N 4 can achieve a maximum removal rate of 57% for NO. According to the experimental results of ESR and other experiments, a more complex Z-scheme photocatalytic mechanism is proposed, which has stronger redox ability than the traditional mechanism.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2022
·
IF 3.475
Fulong Chen,Lijiang Tian,Bingkun Liu,Yue Sun,Sijie Ge,Jing Hou
A new type of photocatalysts, nanocrystalline titanium dioxide (TiO2) doped with Co and I, were synthesized and modified via the sol-gel method to enhance the utilization of visible light. Herein, mono- and co-doped TiO2 (i.e. Co-TiO2, I-TiO2, Co-I-TiO2) were employed as the photocatalysts to investigate the photocatalytic performance on gaseous benzene removal. The prepared photocatalysts were characterized by X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET)-specific surface areas, Raman spectroscopy, UV-visible diffuse reflectance spectroscopy (UV-vis-DRS), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL), and electrochemical impedance spectroscopy (EIS). Results indicated that both particle sizes and band gaps of TiO2 were significantly reduced by doping with Co/I. Also, the lattice defects and the specific surface areas of TiO2 were substantially augmented by adding Co/I because of the increase of oxygen vacancies, especially for Co-I-TiO2. Meanwhile, Co and I were distributed on the titanium base with the existence of multivalent states. The benzene treatment capacity of Co-I-TiO2, Co-TiO2, I-TiO2 and Pure TiO2 is 441.46, 424.36, 388.06, and 51.25 μgC6H6/(g·h), respectively. To sum up, photocatalytic degradation of gaseous benzene could be improved by doping with Co/I because of the extension of catalyst lifetime and light response range covering visible light.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2022
·Vol. 28
·期 68
·e202202004
·
IF 5.02
Conghui Zhao,Liwei Sun,Yang Xu,Beibei Dong,Yuhong Luo,Jingde Li,Jianxin Chen,Zisheng Zhang
Graphical Iodine-doped Bi 2 GdO 4 Cl with a significantly promoted visible-light-responsive O 2 -evolving performance of 154.8 μmol ⋅ h −1 and an apparent quantum efficiency of ∼1.1 % at 420 nm is reported. The incorporation of I − ions causes the extended light absorption and promoted charge separation. Visible-light-responsive bismuth-based oxyhalide has recently attracted extensive attention, however, the promotion of its charge separation is still challenging. Herein, we introduce iodine into Bi 2 GdO 4 Cl to synthetize I-doped Bi 2 GdO 4 Cl (denoted as yI−Bi 2 GdO 4 Cl, 0≤y≤2). The incorporation of I − ions is found to enhance light absorption and to accelerate charge separation by combining various characterizations such as density functional theory calculation, photoelectrochemical test, electrochemical impedance spectroscopy, photoluminescence spectrum, and open-circuit voltage decay. The O 2 -evolving performances of 1I−Bi 2 GdO 4 Cl with optimized dopant concentration of I − ion and IrO 2 loaded 1I−Bi 2 GdO 4 Cl are tremendously enhanced by ca. 4 and 45 times compared to pristine Bi 2 GdO 4 Cl. Notably, The O 2 evolution rate reaches as high as 154.8 μmol ⋅ h −1 with an apparent quantum efficiency of ∼1.1 % at 420 nm. The synthetic iodine-doped photocatalyst remains stable after long-term photoreaction, demonstrating its potential in the field of photocatalysis.
研究领域:
材料科学
·
光催化
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2012
·
IF 2.921
Zhiqiao He,Tianmi Hong,Jianmeng Chen,Shuang Song
A series of iodine-doped titanium dioxide (I-TiO 2 ) photocatalysts was synthesized by using silica-coated Fe 3 O 4 (SF) as the magnetic core (abbreviated here as ITSF), in order to facilitate the efficient recovery of these photocatalysts. Transmission electron microscopy and X-ray diffraction results indicated that the ITSF nanoparticles had a ternary structure with a core of Fe 3 O 4 , a SiO 2 mesosphere and an I-TiO 2 crust with a mixture of anatase and rutile phases. Magnetic measurements with a vibrating sample magnetometer showed that the ITSF core–shell structures exhibited favorable superparamagnetic behaviors and the magnetic saturation value decreased after coating with the non-magnetic I-TiO 2 layer. The photocatalytic activity of the particles was tested by degrading an aqueous phenol solution under visible-light illumination. The photocatalytic activity of the multi-functional hybrid magnetite nanoparticles was enhanced with increasing content of TiO 2 , while the magnetism of the composite particles decreased. Moreover, an optimum molar ratio of 1:10 I/TiO 2 was determined for the efficient degradation of phenol. The study showed that the presence of SF magnetic core would be helpful in the separation and recovery of I-TiO 2 photocatalysts.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL ENGINEERING SCIENCE
·
2022
·Vol. 39
·期 3
·259-267
·
IF 2.172
Yue Sun,Lijiang Tian,Bingkun Liu,Fulong Chen,Sijie Ge
In this article, Mn/I-TiO2 nanocatalyst was prepared by sol-gel method and used as the photocatalyst to discompose the gaseous benzene in the visible light. The crystal phase composition and grain size of the photocatalyst were investigated by X-ray diffraction and Raman, respectively. X-ray photoelectron spectroscopy and ultraviolet-visible diffuse reflectance spectroscope were used to study the surface elements and bandgap width of the photocatalyst. The research findings suggested that the crystal type of all catalysts was anatase. TiO2 nanoparticle doped by Mn/I could reduce its crystallite size and augment lattice distortion because of the formation of oxygen vacancies. The generation rate, migration rate, and disintegration rate of electron-hole pairs were increased by modification of TiO2. Meanwhile, the Mn-TiO2 was recognized with the smallest bandgap among four kinds of catalyst. Mn-TiO2 catalyst exhibited the highest efficiency on gaseous benzene removal (37.86%) among pure-TiO2 (3.33%), I-TiO2 (30.21%), and Mn-I-TiO2 (31.56%) under visible light. Correspondingly, the photocatalytic ability of pure-TiO2, I-TiO2, Mn-I-TiO2, and Mn-TiO2 was 51.25 μg C6H6/(g·h), 424.36 μg C6H6/(g·h), 493.61 μg C6H6/(g·h), and 245.43 μg C6H6/(g·h), respectively.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yili Zhang,Yongchun Zhao,Zhuo Xiong,Rihong Xiao,Tian Gao,Pengfei Liu,Jing Liu,Junying Zhang
The application of photocatalytic Hg 0 oxidation under visible light is an up-and-coming method to solve the problem of energy shortage and environmental pollution. In this work, iodine doped Bi 2 MoO 6 nanomaterials were prepared by one-step solvothermal method . The photocatalytic oxidation efficiency was greatly improved by iodine doping from 35.5% to 95.2% in the N 2 + 4% O 2 atmosphere under visible light. The main reason was that iodine doping decreased the band gap of the catalyst, expanded the optical response range and intensity, sped up the separation rate of photoinduced carriers and reduced the recombination rate. In addition, the flue gas components of SO 2 and NO played a promoting role in mercury removal. Iodine doped Bi 2 MoO 6 had good stability and still maintained high mercury removal efficiency after 5 cycles. Density functional theory (DFT) calculations and experiments demonstrated that iodine doping changed the valence band and conduction band of the catalyst, making superoxide ions, hydroxyl radicals and photoinduced hole become the active species of the catalytic reaction .
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2020
·
IF 1.943
Tongtong Liu,Yawen Wang
Platinum loaded BiOBr with iodine doping photocatalyst (Pt/I-BiOBr) was synthesized to further improve the photocatalytic activity of BiOBr. The photocatalytic test showed the bisphenol A degradation efficiency of Pt/I-BiOBr under visible light was about 93% within 20 min, about 5.8, 1.5 and 1.3 times that of BiOBr, iodine doped BiOBr and platinum loaded BiOBr, respectively. The composition, morphology, optical property and dominant active radical were investigated. Based on the results, a possible mechanism was proposed. Iodine doping and platinum loading played a synergetic effect on broadening the visible light absorption range and increasing the photo-induced carrier separation efficiency of BiOBr.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Shuai Liu,Kaiying Hu,Lili Yao,Yu Mao,Hao Qu,Baolei Dong,Lei Zheng
Organic peroxides in foodstuffs like lipid hydroperoxides and benzoyl peroxide (BPO) have risks to human health, which need rapid and on-site determination. This study prepared hydrophobic and reductive fluorescent iodine-doping carbon dots (I-CDs) via a solvothermal strategy using oleylammonium iodide as the precursor. The I-CDs can be used as nanoprobes to rapidly and sensitively determine organic peroxides. Organic peroxides can oxidize the I-CDs to produce I 2 , which can efficiently quench their fluorescence through the inner filter effect. Furthermore, hydrophobic aerogels were prepared to incorporate the I-CDs, constructing a fluorescent sensor. When combined with a smartphone and portable detection equipment, the developed sensor enables rapid on-site testing of peroxide values (PVs) in edible oils, as well as BPO in flour. The fluorescent sensor has a detection limit of 1.2 mmol/kg for PVs and 0.10 mmol/kg for BPO. Our study provides an efficient tool for monitoring organic peroxides in foodstuffs.
研究领域:
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2020
·
IF 3.784
Jinhuan Hu,Guo Jiang
Passive anti-icing and active deicing have been combined to improve the anti-icing performance of substrate surface in recent years. Some researchers have prepared active deicing coatings by inducing particles with photothermal or magnetic thermal properties. However, the thermogenesis of these coatings can weaken due to loss of particles. In this work, we first take advantage of the photothermal properties of iodine in deicing process, using polymer substrate doped with iodine by heating to endow the substrate with a photothermal property. Superhydrophobic SiO 2 /SiC coatings with passive anti-icing properties were fabricated on the iodine-doped substrate by a simple spray coating method. The prepared surface of samples can warm up to melt the ice under the irradiation of near infrared light and possesses excellent water repellency with a contact angle up to 162°. The results of 3D profile and microstructure observed via scanning electron microscopy demonstrate that the coatings combined with microscale SiC and nanoscale SiO 2 form voids that can capture air pockets. The photothermal effect of substrate-iodine was demonstrated as the surface temperature of the coatings rapidly increased to about 200 °C upon 10 s of irradiation. The concept of harnessing the iodine doping substrate to achieve superior photothermal performances in deicing might shed new light on the development of anti-icing materials for various applications.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 28
·23134-23140
·
IF 3.289
Zhiqiao He,Yan Yu,Da Wang,Juntao Tang,Jianmeng Chen,Shuang Song
Iodine-doped titanium dioxide nanosheets with high exposed {001} facets (IFTO) were synthesized by a two-step hydrothermal treatment followed by calcination at 350 °C. The photocatalyst samples were characterized by X-ray diffractometry, transmission electron microscopy, field emission scanning electron microscopy, ultraviolet-visible diffuse reflectance spectra, Brunauer–Emmett–Teller measurements and X-ray photoelectron spectroscopy. The IFTO were more active than surface-fluorinated TiO2 nanosheets or iodine-doped TiO2 nanoparticles in the gaseous reduction of CO2 with water vapor. The IFTO photocatalytic activity was repeatable over five successive cycles. Coexisting I–O–Ti and I–O–I structures in the IFTO TiO2 lattice contributed to visible light absorption and a high percentage of exposed {001} facets that enhance H2O oxidation. Surface fluorination promoted the formation of unsaturated Ti atoms, which helped reduce CO2 to CO2− and retard the recombination of photogenerated electron–hole pairs.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
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