OPTICAL MATERIALS
·
2019
·
IF 2.687
Jiang Wu,Haowen Bai,Wenjie Qu,Guanying Cao,Yanjie Zhang,Jingjie Yu
CsPbBr 3 quantum-dot borosilicate microcrystals and Eu 3+ -doped CsPbBr 3 quantum-dot microcrystals with different concentrations of Eu 3+ are successfully prepared by high temperature melting. The particle morphology of the microcrystals is characterized by scanning electron microscopy (SEM). The fluorescence characteristics are analyzed by fluorescence spectroscopy and CIE chromaticity coordinates . In this research, CsPbBr 3 quantum dots are effectively coated with borosilicate microcrystals to improve the stability of CsPbBr 3 quantum dots while ensuring its strong green emission at 517 nm. The energy transfer from CsPbBr 3 quantum dots to Eu 3+ occurs after doping. When changing the concentration of Eu 3+ , the emission peaks of perovskite broaden and blue shift occurs (517 nm→474 nm). The CIE color coordinate moves from (0.0807, 0.7200) to (0.4537, 0.2724). Therefore, the continuous adjustment of solid perovskite materials from green light to blue light and then to red light region is realized.
研究领域:
材料科学
·
纳米光学
·
无机非金属材料
·
光电子学
·
发光材料
·
固态化学
✓ 已验证
DOI
高影响因子
KINETICS AND CATALYSIS
·
2025
·
IF 1.4
Jiang Xin,Zeng Zhenxing
Interfacing two semiconductors for heterojuctions construction has been considered as an effective way to facilitate electron-hole separation, thus improving the photocatalytic activity. In this paper, PCN-224/g-C 3 N 4 heterojunction was constructed by PCN-224 and g-C 3 N 4 using a solvothermal method. Transmission electron microscopy (TEM) images reveal a well-matched, smooth interface between PCN-224 and g-C 3 N 4 , demonstrating the successful formation of a tight junction. Photoelectric performance tests confirm that the heterojunction significantly enhances the light absorption capability within the visible range and improves the efficiency of electron-hole separation. Herein, the PCN-224/g-C 3 N 4 heterojunction exhibited excellent photocatalytic activity in both disinfection and organic pollutant degradation. Under visible light irradiation (λ > 420 nm) for 3 h, it completely degraded phenol and effectively inactivated E. coli . In the photocatalytic process, electrons migrate from the conduction band of g-C 3 N 4 to PCN-224, while holes transfer from the valence band of PCN-224 to the valence band of g-C 3 N 4 , thereby generating \({\text{O}}_{2}^{{\bullet - }}\) and h + radicals. These generated radicals effectively oxidize and degrade phenol.
研究领域:
材料科学
·
环境科学
·
化学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 53
·33373-33379
·
IF 3.361
Lejie Zhu,Jianmin Luo,Guohui Dong,Yun Lu,Yinlong Lai,Jun Liu,Guanmei Chen,Yi Zhang
As a kind of metal-free organic semiconductor photocatalyst, g-C3N4 has been widely explored for use in photocatalysis. However, the low quantum yield, small absorption range, and poor conductivity limit its large-scale application. Introducing another kind of semiconductor, particularly an oxide semiconductor, can result in some unexpected properties, such as an improved change transfer, enhanced light absorption, and better conductivity. In this work, CuO/g-C3N4 is successfully prepared through an impregnation and post-calcination method. A series of measurements support the formation of an organic-inorganic hybrid p–n heterojunction at the CuO (p-type) and g-C3N4 (n-type) interface. Furthermore, the photoactivity of the composite is evaluated via photocatalytic NO removal and the visible degradation of rhodamine B (RhB). Results show that the photocatalytic properties of CuO/g-C3N4 are almost twice as high as those of g-C3N4. In comparative tests, the photocatalytic degradation performance of Mix-CuO/g-C3N4 (the mixture of CuO and g-C3N4 nanosheets prepared by mechanically mixing) is even lower than that of pure g-C3N4. The degradation of RhB is only 19.7% under visible light after 30 min of irradiation. The improvement in the photoactivity of CuO/g-C3N4 results from the built-in electric field close to the formed p–n heterojunction, which switches the electron transfer mechanism from a double-charge transfer mechanism to a Z-scheme mechanism. In addition, the formed p–n heterojunction favors charge transfer, and thus the photocatalytic performance is significantly improved.
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
·
半导体物理
✓ 已验证
DOI
高影响因子
DRUG DELIVERY
·
2019
·
IF 3.829
Wenguang Gu,Tao Zhang,Junsheng Gao,Yi Wang,Dejian Li,Ziwen Zhao,Bo Jiang,Zhiwei Dong,Hui Liu
Protein-based nanocarriers with inherent biocompatibility have been widely served as building blocks to construct versatile therapeutic nanoplatforms. Herein, bovine serum albumin-iridium oxide nanoparticles (denoted BSA-IrO2 NPs) are successfully synthesized via one-step biomineralization approach. The BSA-IrO2 NPs exhibits uniform size (40 nm), superb biocompatibility and high drug loading capacity for doxorubicin (27.4 wt%). Under near-infrared (NIR) laser irradiation, the as-prepared BSA-IrO2 NPs exhibited high photothermal conversion ability (54.3%) and good photostability. The in vitro drug release experiments displayed pH and NIR laser -triggered DOX release profiles, which could enhance the therapeutic anticancer effect. By utilizing this DOX loaded nanoplatform, effective synergistic chemo-photothermal therapy against human osteosarcoma can be realized, which has been systematically verified both in vitro and in vivo. Notably, in vivo pharmacokinetics studies showed that BSA-IrO2@DOX had prolonged blood circulation time due to the BSA component can improve the stealthiness of the nanoparticles during the blood circulation. Meanwhile, in vitro and in vivo toxicity studies demonstrated that the BSA-IrO2 NPs can act as biocompatible agents for drug delivery and cancer therapy. Therefore, this work presents a biomineralized iridium-based NPs with remarkable features and be used as a very potential therapeutic nanoplatform for cancer treatment.
研究领域:
生物医学工程
·
肿瘤学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD AND AGRICULTURAL IMMUNOLOGY
·
2019
·
IF 2.398
Zexiang Wang,Song Hu,Ganggang Zhang,Jintao Liu,Jun Xia,Juan Peng,Weihua Lai
Sulfamethazine (SMZ), widely used for disease prevention of bees, is harmful to consumers when excess SMZ residues are present in honey. In this study, a novel competitive lateral flow immunoassay (LFIA) was established by using aggregation-induced emission fluorescent microsphere (AIEFM) as label for the detection of SMZ. Results indicated that the limit of detection (LOD) for the developed competitive AIEFM-LFIA in honey was 0.028 ng/mL, and the corresponding linear range was 0.05−5 ng/mL. Recovery experiments showed that the average recovery range was 75.6–95.1% with coefficient variations of 5.7–12.9% in honey. The developed competitive AIEFM-LFIA was compatible with HPLC-MS/MS in detecting SMZ in 15 real samples from honey. In general, the proposed AIEFM-LFIA is well suited for the competitive format and has great potential for the detection of other small targets with single antigenic site in practical application.
研究领域:
食品安全
·
分析化学
·
免疫学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 9
·2645-2652
·
IF 7
Ruonan Xi,Yilin Jiang,Yukong Li,Jinlin Yin,Honghan Fei
Layered organolead halides are an emerging class of self-trapped emitters, in which the unique corrugated structures are critical to afford out-of-plane distortions for self-trapping. However, the labile corner halide species are often more exposed in corrugated layers, posing the trade-off relationship between structural corrugation and chemical robustness. Herein, we report a layered architecture consisting of inorganic [Pb2Cl2]2+ slabs and interlamellar 4,5-imidazoledicarboxylate struts, exhibiting large Stokes-shifted broadband emission originating from self-trapped excitons. The coordination-assembly hybrid possesses both high structural integrity and heavily corrugated lead chloride layers, therefore affording ultrastable and efficient self-trapped photoluminescence. The broadband emission is well retained after a variety of chemical treatments and maintains the spectral profile for at least 168 h upon continuous UV irradiation under ambient conditions, superior to conventional ionic structures for halide perovskites. The photophysical carrier dynamics and the exciton self-trapping process of our layered material have been clarified by a variety of photophysical studies including ultrafast transient absorption spectroscopy.
研究领域:
材料科学
·
无机化学
·
光电子学
·
光物理
·
配位化学
·
固体化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Yifan Zhang,Jie Shi,Xiaoqing Ding,Jiaojiao Wu,Yan-Zhen Zheng,Xia Tao
Unary-organic-cation lead halide perovskites like MAPbI3 have been emerging as tremendous photocatalysts for H2 evolution recently. However, their photocatalytic performances are inferior without modification. Here, a series of mixed-organic -cation perovskites MA1–xFAxPbI3 (M1–xFxPI, x = 0, 0.2, 0.3, 0.4, 0.5) were synthesized by introducing FA+ into MAPbI3 precursor and then composited with MoS2 as photocatalysts for H2 evolution reaction (HER). We demonstrate that the fabricated MoS2/M0.6F0.4PI is highly efficient and ultrastable during the photocatalytic HER process. The optimal MoS2/M0.6F0.4PI composite, i.e., 20 wt % MoS2/M0.6F0.4PI exhibits a visible HER rate of 2131 μmol h–1 g–1, increasing by 88-fold in comparison with pure MAPbI3 (24 μmol h–1 g–1) and better than the optimized Pt/M0.6F0.4PI (1328 μmol h–1 g–1). No activity degradation of 20 wt % MoS2/M0.6F0.4PI occurs in repeated HER experiments. The (photo)electrochemical performances of the composite are studied to reveal the photoinduced charge transfer and consequent HER process.
研究领域:
材料科学
·
光催化
·
能源化学
·
纳米材料
·
半导体物理
·
太阳能转化
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2014
·Vol. 39
·期 3
·1892-1898
·
IF 3.159
Xuehua Yin,Jin Cai,Hongyan Feng,Zeming Wu,Jianmei Zou,Qingyun Cai
A novel ultrasensitive sensing system for rapid fluorescence detection of cytochrome c (cyt c) was proposed by combining aptamer-based bioassay with VS2 nanosheets. VS2 nanosheets with high fluorescence quenching ability were synthesized by the solution route. A cyt c-binding aptamer was tagged with the fluorescent dye carboxy fluorescein (FAM), acting as the probe. VS2 nanosheets can adsorb the probe and quench its fluorescence efficiently. However, the fluorescence of the probe was retained when it was incubated with cyt c and then mixed with VS2 nanosheet solution. The proposed sensing system shows high selectivity and sensitivity, giving a linear range of 0.75 nM to 50 μM, and a limit of detection of 0.50 nM.
研究领域:
纳米技术
·
生物传感器
·
分析化学
·
生物分析化学
✓ 已验证
DOI
高影响因子
Materials Horizons
·
2023
·Vol. 10
·期 12
·5684-5693
·
IF 13.3
Panqin Wang,Jiaren Du,Tengyue Wang,Shaoxing Lyu,Rik Van Deun,Dirk Poelman,Hengwei Lin
Despite the substantial progress made, the responsiveness of thermo-responsive materials upon various thermal fields is still restricted to monochromatic visualization with single-wavelength light emission. This stems from a poor understanding of the photophysical processes within the materials and the unvarying optical performance of luminescent centers’ response to various ambient temperatures. Conventional techniques to assess the inhomogeneities of thermal fields can be time-consuming, require specialized equipment and suffer from inaccuracy due to the inevitable interference from background signals, especially at high temperature. To this end, we overcome these limitations for the first time, to flexibly visualize temperature inhomogeneities by developing a thermochromic smart material, SrGa12−xAlxO19:Dy3+. Two distinct modes of thermochromic properties (steady-state temperature-dependent luminescence and thermally stimulated luminescence) are investigated. It is revealed that the abundant colors (from yellow, green to red) and amazing color-changing features are due to the superior optical integration of the host (SrGa12−xAlxO19) and dopant (Dy3+) emissions under specific thermal stimulations. We suggest that this thermo-responsive smart material can be used to realize highly efficient and simple visualization of invisible thermal distribution in industry and beyond.
研究领域:
材料科学
·
光学工程
·
热物理学
·
功能材料
·
工业检测
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2020
·Vol. 7
·期 7
·1902075
·
IF 4.948
Zhenyu Xu,Liang Hu,Jun Yuan,Yiyue Zhang,Yujie Guo,Zhengyuan Jin,Fangchao Long,Yaojia Long,Huawei Liang,Shuangchen Ruan,Yu-Jia Zeng
Fluorescence method for detecting metal ions has advantages of fast detection speed, simple operation, and low price over the conventional methods. Black phosphorus quantum dots (BP QDs) have high photoluminescence quantum yield and modifiable surface, which have great potential in the field of fluorescent probes. In this study, high quality BP QDs are prepared by pyrolysis method and are first time used as trace metal ion probes in both organic solutions and aqueous solutions. The detection limits of Hg 2+ and Cu 2+ in the aqueous solution are 5.3 × 10 −9 m and 1.6 × 10 −6 m , respectively. In addition, the detection limits of Cu 2+ in the organic solution are 16 × 10 −6 m . The fluorescence quenching mechanism based on the calculation of the electronic structure and adsorption energy of BP QDs after adsorption of metal ions is further explained. The results provide a new promising fluorescence probe for trace metal ions without the help of organic molecules.
研究领域:
分析化学
·
纳米生物技术
·
环境监测
·
分子探针
·
光子学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Naizhang Xu,Bowei Cai,Qi Li,Yubing Liu,Jie Tang,Kaiqiang Wang,Bolian Xu,Yining Fan
The covalent triazine frameworks (CTFs) have recently become a new generation of organic semiconductor for photocatalytic hydrogen production from water splitting because of their great application potentials. However, the CTFs need to be combined with noble-metal-cocatalysts to achieve photocatalytic water splitting. Herein, we reported the noble-metal-free Ni 2 P/CTF composites as an efficient catalyst for photocatalytic hydrogen evolution . With increasing the Ni 2 P alloy loading on the surface of CTF, the photocatalytic activity increases obviously and then decreases gradually, and the highest photocatalytic H 2 evolution rate is achieved for 2.8%Ni 2 P/CTF, which is almost the same as that of 3.0%Pt/CTF photocatalyst. It has been revealed that the Ni 2 P alloy act as a cocatalyst for effectively suppressing the recombination of photogenerated electrons and holes, promoting the separation and migration of the charge carriers, thereby improving the efficiency of photocatalytic H 2 evolution. This work provides a promising strategy for preparation of cheap and stable photocatalytic system based on CTF for efficient photocatalytic hydrogen evolution under visible-light irradiation.
研究领域:
材料化学
·
光催化
·
能源化学
·
半导体物理
·
可持续能源
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2024
·
IF 3.3
Cong Fu,Lingfang Liu,Cici Wang,Weixin Huang,Guofeng Zhao
Unraveling the effect of defects on the concentration of surface-available photoexcited charges is of great importance for semiconductors in photocatalysis. Herein, by using in situ diffuse-reflectance infrared (IR) spectroscopy, the concentration of surface-available photoholes on TiO2 nanoparticles with tunable bulk/surface defects was quantified by an adsorbate (methanol) surface elementary reaction kinetic analysis method. Reaction kinetics showed that the oxidation of the adsorbed methanol species under light irradiation was a first-order reaction. Therefore, the concentration of surface-available photoholes can be calculated from the rate constants of adsorbed methanol on the TiO2 surface. By carefully comparing the specific reaction rate constants on the TiO2 surface with various bulk/surface defect ratios, we demonstrated for the first time that increasing the bulk defect concentration relative to the surface defects decreases the concentration of surface-available photoholes. This trend implicates different effects of bulk and surface defects on band bending and subsequent interfacial hole transfer processes in TiO2 nanoparticles. These insights not only reveal the mechanistic role of surface and bulk defects in photocatalysis but also highlight that in situ IR spectroscopy combined with reaction kinetic analysis has enormous potential in elucidating photocatalytic mechanisms.
研究领域:
光催化
·
材料化学
·
表面科学
·
物理化学
·
纳米材料
·
分析化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）