CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Peng Zhang,Feiming Li,Shujuan Lin,Wen-Jie Chen,Dejian Chen
Lead halide perovskite nanocrystals (PNCs) have emerged as promising materials for photocatalysis due to their exceptional optoelectronic properties, yet achieving efficient charge separation and selective oxidation reactions remains a significant challenge. In this study, we report the synthesis of Fe 3+ -doped CsPbBr 3 /SiO 2 nanocomposites (Fe-PNCs/SNPs) with gradient energy levels, designed to enhance photocatalytic performance. Our results demonstrate that Fe 3+ doping introduces mid-gap states, promotes photoinduced charge separation, and generates reactive oxygen species (ROS) such as O 2 − and OH radicals under sunlight-simulating light irradiation from a 300 W Xe arc lamp. The Fe 20 -PNCs/SNPs catalyst achieved over 99 % conversion of benzyl alcohol to benzaldehyde with high selectivity and stability in the ethanol under ambient conditions. Additionally, the catalyst exhibited excellent recyclability and broad substrate tolerance. These findings highlight the innovative design of gradient energy levels in perovskite nanocomposites, offering a new strategy for enhancing photocatalytic efficiency in selective organic transformations.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2018
·
IF 5.106
Qiaoqi Li,Lili Zhang,Pu Su Zhao,Jingzhou Yin,Jun Xia,Zhen-Huan Sheng,Fei Wang,Zhigang Wang,Chengzhu Yin,Jianhua Lin
Gallium borates semiconductors have been developed as effective photocatalysts for water splitting driven by UV light irradiation, but there is no relevant study for the CO2 photoreduction application. Herein, we report the first systematic investigation of open-framework gallium borate—Ga9B18O33(OH)15•H3B3O6•H3BO3 (Ga-PKU-1) applying to photocatalytic CO2 reduction under visible light irradiation by doping Fe3+ ion doping onto the framework. Using hydrothermal method, a series of Fe3+-incorporated Ga-PKU-1 have been successfully obtained, and a high Fe3+-to-Ga3+ substitution content (~10 atom %) can be achieved. The Ga-PKU-1:xFe3+ (x = 0.02 ~ 0.10) photocatalysts are characterized completely by diverse tests (e.g., XRD, XPS, UV-Vis DRS, SEM, N2 sorption). The effective replacement of Ga3+ ion by Fe3+ ion could inhibit the degree of crystallinity of Ga-PKU-1, and also significantly expands the scope of spectral response from UV light to visible light. Compared with bare Ga-PKU-1, Ga-PKU-1:0.10Fe3+ exhibits remarkable CO formation rate of 3.2 μmol/h/g at 30 °C, and the selectivity for CO evolution exceeds 91.4 %. Besides, the CO formation rate increases to 8.3 μmol/h/g after thes loading of Ag as the co-catalyst. After four cycles of photocatalytic CO2 reduction reaction experiments, it still gives constant CO evolution rate and the catalyst is stable. Furthermore, the thermal behavior research indicates Ga-PKU-1:xFe3+ could maintain structural stability at 400 °C.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Fanbing Lai,Wei Shi,Shuyun Hu,Xiaohong Li,Qibing Chang,Yongqing Wang,Qikun Wang
In this work, SrMn 1- x Fe x O 3- δ ( x = 0–1) black ceramic pigments were synthesized by the solid-state method. The research explores the influence of calcination temperature and iron ion doping on the color properties of the pigments. Furthermore, the potential applications of SrMn 1- x Fe x O 3- δ pigments in ceramic glaze and heat-absorbing materials are also discussed. The findings reveal that the synthesized SrMnO 3 pigment exhibits the lowest L* -value (22.30) at 1100 °C, although it displays a slight blue hue. To optimize the color properties of the SrMnO 3 pigment, iron ion doping is employed. When the doping level of iron ions is 50 mol.% (i.e., x = 0.5), the L* -value of the SrMn 0.5 Fe 0.5 O 3- δ pigment calcined at 1000 °C significantly decreases to 19.77, while the a* - and b* -values approach 0, resulting in a pure black color. This is attributed to the high surface roughness , low band gap energy, and substantial oxygen vacancies present in the SrMn 0.5 Fe 0.5 O 3- δ pigment. The tinting mechanism of the SrMn 1- x Fe x O 3- δ pigment in the ceramic glaze is classified as "ion tinting", wherein the glaze color relies on the concentrations of Mn and Fe ions. When the pigment content reaches 36 wt%, the L* -value of the glaze drops to 4.94, showing a deep black shade. Additionally, the SrMn 0.5 Fe 0.5 O 3- δ pigment exhibits excellent sunlight absorption capabilities, with a near-infrared reflectance ( R *) of only 5.04%. This research presents a black ceramic pigment with various advantages, such as simplified processing, affordability, environmental friendliness, and exceptional color performance.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Li Jin,Renjie Huo,Runping Guo,Fei Li,Dawei Wang,Ye Tian,Qingyuan Hu,Xiaoyong Wei,Zhanbing He,Yan Yan,Gang Liu
The electrostrictive effect has some advantages over the piezoelectric effect, including temperature stability and hysteresis-free character. In the present work, we report the diffuse phase transitions and electrostrictive properties in lead-free Fe3+-doped 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 (BZT-0.5BCT) ferroelectric ceramics. The doping concentration was set from 0.25 to 2 mol %. It is found that by introducing Fe3+ ion into BZT-0.5BCT, the temperature corresponding to permittivity maximum Tm was shifted toward lower temperature monotonically by 37 °C per mol % Fe3+ ion. Simultaneously, the phase transitions gradually changed from classical ferroelectric-to-paraelectric phase transitions into diffuse phase transitions with a weak relaxor characteristic. Purely electrostrictive responses with giant electrostrictive coefficient Q33 between 0.04 and 0.05 m4/C2 are observed from 25 to 100 °C for the compositions doped with 1–2 mol % Fe3+ ion. The Q33 of Fe3+-doped BZT-0.5BCT ceramics is almost twice the Q33 of other ferroelectric ceramics. These observations suggest that the present system can be considered as a potential lead-free material for the applications in electrostrictive area and that BT-based ferroelectric ceramics would have giant electrostrictive coefficient over other ferroelectric systems.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2020
·Vol. 27
·期 22
·27849-27858
·
IF 3.056
Ou Qi,Xu Shuxia,Long Yuanli,Zhang Xinfeng
The development of efficient solar driven catalyst for the degradation of antibiotics has become increasingly important in environmental protection. However, the reported efficient photocatalysts for antibiotic degradation are limited. In this work, porous Fe 3+ -doped graphitic carbon nitride (g-C 3 N 4 ) with outstanding photocatalytic ability is synthesized and then used as the photocatalyst for the efficient degradation of sulfadiazine (SDZ) under visible light. A series of characterization results indicate that Fe 3+ is successfully doped into the interlayer of g-C 3 N 4 and is stabilized in g-C 3 N 4 by Fe-N coordination bond. The SEM, DRS and ESI and transient photocurrent results demonstrated that Fe 3+ -doped g-C 3 N 4 has a porous structure, a low band gap, improved separation efficiency of photogenerated electron and holes as well as a wider light absorption range. Such improved physical and chemical properties greatly enhanced the photocatalytic ability. Using Fe 3+ -doped g-C 3 N 4 for photocatalytic degradation of SDZ under white light, almost complete degradation of SDZ was achieved with a degradation efficiency as high as 99.8% (whereas only 52.1% for bulk g-C 3 N 4 ) within 90 min. The degradation was mainly ascribe to 1 O 2 during the irradiation, and also a small amount of •O 2 − , OHand h + are involved in the degradation process. The Fe 3+ -doped g-C 3 N 4 was applicable for the degradation of a wide range of antibiotic pollutants.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Nano Energy
·
2024
·
IF 16.8
Sijia Sun,Chaozheng Liu,Shuai Zhang,Qinglin Wu,Dan Tian,Changtong Mei,Mingzhu Pan
Regulating structural phase transitions of metal insulator transition (MIT) correlated materials is an ideal approach to modulate their properties. However, due to phase transition hysteresis, ultrasensitive electron transition is difficult to achieve. Here, we develop a convenient method via Fe ions surface doping-induced oxygen vacancies (OVs) at the Ti 3 O 5 surface to enable ultrasensitive electronic transitions. The Fe doping promotes the formation of free electrons , which is attributed to the reduced bandwidth, making it relatively easy for valence band electrons to leap to the conduction band . The formation of OVs increase the electron concentration and enhance the electronic conductivity (2.49×10 −4 S/cm) at low temperatures, resulting in an ultrasensitive sensing over a wide temperature range before metal insulator transition. This unique property facilitates its application in fire warning with ultrasensitive sensing (response time 0.63 s, and response temperature 150 °C) and good durability. Moreover, the as-obtained MIT correlated material with rich-OVs structure exhibits excellent oxygen sensing and photothermal conversion properties. These results offer a novel design for MIT correlated materials and provide an innovative insight for modulating their multifunctional properties.
研究领域:
材料科学
·
能源转换
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Hao Liang,Guang Yang,Meng Zhang,Daiqi Zhou,Fang Xia,Barbara E. Etschmann,Joël Brugger,Viktor Taktas,Yanfeng Gao
Windows are essential for advancing energy efficiency, yet fabricating window materials that simultaneously achieve high visible light transmission, exceptional and ultrabroadband near-infrared (NIR) shielding, neutral color appearance, excellent stability, and cost-effective, sustainable production remains a significant challenge. This study introduces ferrous ion-doped phosphosilicate glass (Fe 2+ -PSG), a material that meets all these criteria, establishing itself as a promising candidate for energy-efficient windows. Comprehensive characterization using Raman spectroscopy, synchrotron X-ray absorption near edge spectroscopy (XANES), UV–Vis-NIR transmission spectroscopy, and structural analysis reveals that the glass achieves superior visible light transmission performance (T lum = 84.1 ± 0.3 %) and a neutral color temperature of 6753 ± 45 K. These remarkable properties are primarily attributed to the formation of colorless ferrous [FeO 6 ] units, whose unique coordination environment is precisely controlled through phosphorus incorporation. Superior ultrabroadband NIR-shielding (750–2500 nm), with a high NIR-shielding figure of merit of 1.8 ± 0.1, is enabled by the incorporation of larger alkali ions such as K + and Cs + . Additionally, Fe 2+ -PSG demonstrates exceptional stability, maintaining its performance after 12 months under ambient conditions and 24 h in hot water at 80 °C and in air at 120 °C. These high-performance characteristics are attributed to structural modifications that alter the splitting energy of ferrous ions, enabling precise control over optical properties across the visible and NIR spectrum. Manufactured using the scalable and cost-effective melt-quench method, Fe 2+ -PSG offers a practical solution for sustainable window production, addressing limitations of current technologies and paving the way for real-world applications.
研究领域:
材料科学
·
光学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 13
·5147-5154
·
IF 8.067
Yanbin Chen,Hewei Yang,Jian Song,Bao Zhang
Doping metal ions into a perovskite lattice is an effective strategy for tailoring the intrinsic properties of perovskite nanocrystals (NCs). Herein, strong red-emitting and highly ambient and light stable Fe2+-doped CsPbBrI2 NCs with a maximum photoluminescence quantum yield (PLQY) of 92.1% were obtained. Systematic investigation of Fe2+ doping on the stability and the luminescence performance of CsPbBrI2 NCs was performed. Owing to the smaller ionic size compared to Pb2+, Fe2+ induced the lattice contraction and shortened the bond length of Pb–X, which suppressed the distortion of [PbX6]4− octahedra, thus improving the stability of CsPbBrI2 NCs. The champion sample could maintain up to 86% emission under the ambient conditions for 5 weeks. Besides, the incorporation of Fe2+ suppressed the formation of halide vacancies and optimized the relaxation process of CsPbBrI2, thereby contributing to the enhancement of PLQY. This facile Fe2+ doping method provides an effective strategy to synthesize stable and highly photoluminescent red perovskite materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Lin Xiang,Xianju Zhou,Yongjie Wang,Li Li,Sha Jiang,Guotao Xiang,Chuan Jing,Jingfang Li,Lu Yao
Near infrared (NIR) light emitting phosphors have attracted more and more attention with the development of science and technology . Herein, we report a series of environmentally-friendly low-cost Fe 3+ -activated ZnGa 2 O 4 phosphors which exhibit intense broadband NIR light emitting. According to density functional theory (DFT) calculations, ZnGa 2 O 4 host possesses an indirect wide bandgap. The emission of the Fe 3+ -doped phosphors demonstrates a wide band spanning from 650 to 850 nm, with the maximum at 720 nm and a full width at half maxima (FWHM) of 70 nm, showing a large overlap with the absorption of phytochromes (PR and PFR). The luminescence intensity remains at 71% when the temperature is raised to 423 K. The phosphors are fabricated into light emitting diodes (LEDs) which produces strong NIR emission with CIE color coordinates of (0.65, 0.31). All these results suggest that ZnGa 2 O 4 :Fe 3+ is a promising NIR luminescent material , which is expected to be a candidate for indoor plant culture LEDs.
研究领域:
材料科学
·
光电子学
·
农业生物技术
·
固体物理
·
无机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2024
·Vol. 22
·期 1
·1-23
·
IF 10.6
Li Haiqiu,Dou Yichen,Yang Hang,Xing Hanlin,Zhu Cheng,Wang Tao,Xuan Zhaopeng,Yang Mingxi
Background Despite the higher sensitivity of melanoma towards ferroptosis and photodynamic therapy (PDT), the lack of efficient ferroptosis inducers and the poor solubility of photosensitizers restrict their synergistic strategies. With unique advantages, carbon dots (CDs) are expected to serve as innovative building blocks for combination therapy of cancers. Results Herein, an ferroptosis/PDT integrated nanoplatform for melanoma therapy is constructed based on chlorin e6-modified Fe ions-doped carbon dots (Fe-CDs@Ce6). As a novel type of iron-carbon hybrid nanoparticles, the as-prepared Fe-CDs can selectively activate ferroptosis, prevent angiogenesis and inhibit the migration of mouse skin melanoma cells (B16), but have no toxicity to normal cells. The nano-conjugated structures facilitate not only the aqueous dispersibility of Ce6, but also the self-accumulation ability of Fe-CDs@Ce6 within melanoma area without requiring extra targets. Moreover, the therapeutic effects of Fe-CDs@Ce6 are synergistically enhanced due to the increased GSH depletion by PDT and the elevated singlet oxygen ( 1 O 2 ) production efficiency by Fe-CDs. When combined with laser irradiation, the tumor growth can be significantly suppressed by Fe-CDs@Ce6 through cyclic administration. The T 2 -weighted magnetic resonance imaging (MRI) capability of Fe-CDs@Ce6 also reveals their potentials for cancer diagnosis and navigation therapy. Conclusions Our findings indicate the multifunctionality of Fe-CDs@Ce6 in effectively combining ferroptosis/PDT therapy, tumor targeting and MRI imaging, which enables Fe-CDs@Ce6 to become promising biocompatible nanoplatform for the treatment of melanoma. Graphic Abstract
研究领域:
纳米技术
·
癌症治疗
·
生物医学工程
·
材料科学
·
分子生物学
✓ 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）