Journal of Physical Chemistry C
·
2025
·
IF 3.2
Minghao Zhou,Yanlai Wang
CuGaS2 quantum dots (QDs) with uniform size distribution and monodispersion were successfully synthesized by using the hot injection method. Their microstructure, energy band structure, optical properties, and photocatalytic degradation activity were systematically studied. When the reaction temperature was between 180 and 260 °C, the prepared CuGaS2 QDs exhibited a single chalcopyrite structure. The diameter increased from 5 to 18 nm, while the optical band gap decreased from 3.11 to 2.64 eV. Notably, CuGaS2 QDs synthesized at an optimal temperature of 220 °C, with a mean particle size of 8 nm, demonstrated remarkable photocatalytic activity. Under 60 min of UV-LED irradiation at 365 nm, degradation rates of 93.76% for tetracycline hydrochloride (TCH) and 22.45% for methyl orange (MO) were achieved. These results indicate the tremendous potential of CuGaS2 for water pollution remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Cai-Wu Luo,Liang Jiang,Chao Xie,Deng-Gao Huang,Tian-Jiao Jiang
The copper-based materials were considered as promising catalysts for the activation of peroxydisulfate (PDS), but the study on the Cu 2 S-activated PDS under LED illumination and alkaline condition was little reported. In this work, Cu 2 S, a simple and readily available heterogeneous catalyst, was employed to enhance the activation of PDS under alkaline condition through LED illumination. The results indicated that under LED illumination, the degradation rate of tetracycline (TC) during the first 15 min was 3.55 times higher than that of the darkness. A series of important influencing factors were optimized, including anions, humic acid and complex water matrices. The results showed that the Cu 2 S/PDS/LED system exhibited excellent adaptability. Besides, the Cu 2 S maintained a good stability. The quenching experiments and electron spin resonance analysis demonstrated that the electron transfer and 1 O 2 were two primary pathways for the degradation of TC, and also other species such as SO 4 •- and •OH played important roles. Furthermore, X-ray photoelectron spectroscopy characterization and a series of experiments confirmed that the Cu + was the primary catalytic active site, while the S 2- could directly activate PDS and accelerate the cycles of Cu 2+ /Cu + . The toxicity test proved that the toxicity of TC decreased after the degradation. This study not only highlighted the potential of the Cu 2 S/PDS/LED system for efficient TC degradation under alkaline condition but also provided new insights for the development of Cu-based catalytic technologies.
研究领域:
环境科学
·
催化材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2020
·
IF 3.721
Ahui Xue,Wenjing Liang,Shide Wen,Yuanyuan Gao,Xueyong Huang,Yuzhen Tong,Yingbin Hao,Liping Luo
Broccoli sprouts are rich in secondary metabolites, especially glucosinolates (GLs). The synthesis of GLs can be modified by light. In this study, extractive electrospray ionization-mass spectrometry (EESI-MS) was used to analyze the broccoli sprouts extracts (BSE) under different light quality treatments. Multivariable statistical methods were used to analyze the difference of different light quality treatments. Quantitative real-time polymerase chain reaction (qRT-PCR) was used to analyze the gene expression of key enzymes in the aliphatic-GLs biosynthesis pathway. Nineteen compounds, including 7 GLs, 3 phenolic acids, 6 amino acids and 3 organic acids were simultaneously detected in one minute by EESI-MS. Relative expression of MYB28 , BCAT4 , CYP79F1 , CYP83A1 and AOP3 were mostly upregulated in R5B5 (light ratios of red/blue 5:5) treatment. These findings suggest that blue light improving the accumulation of secondary metabolites in broccoli sprouts, and the R5B5 treatment was most beneficial. Furthermore, we established EESI-MS method to simultaneous and rapid detection of secondary metabolites in broccoli sprouts, especially GLs. This study could provide a reference for selecting proper LED lighting conditions to produce broccoli sprouts with high content of bioactive components, and provides light regulation technology and theoretical basis for the industrialized production of sprouts.
研究领域:
植物学
·
代谢组学
·
农业科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Diya Wen,Daoyi Chen,Yuelu Jiang
Unwanted proliferation of and adhesion by microalgae, as involved in fouling and species invasion, are important problems across many maritime operations and coastal industrial activities. The algicidal mechanisms of ultraviolet light-emitting diodes (UV-LEDs) and the synergistic algicidal effects between UV-LEDs and chlorine treatments in seawater were investigated in this study. Tetraselmis sp. was employed as the challenge organism. Five UV wavelengths (265, 280, 285, 300 and 315 nm) and three chlorine dosages (0.6, 0.8 and 1 mg L −1 ) were examined in a factorial experiment to optimize the disinfection performance achieved by combined UV-LED/chlorine treatments in seawater. Overall, the combined treatments showed a more effective inactivation of the microalgae than did the single treatments. Treatment with UV 285 combined with 0.8 mg L −1 chlorine resulted in 3.12-log inactivation at 100 mJ cm −2 (i.e. 2.34 Einsteins L -1 , 67 s). This optimal combination showed a higher inactivation rate constant and lower energy consumption (E E,2 ) than did the other treatments. The contribution of UV-LEDs, chlorine and hydroxyl radical (·OH) in the inactivation of Tetraselmis sp. by the combined UV-LED/chlorine disinfection process was investigated to illustrate the mechanism of this synergistic process, the results indicated that ·OH generated by photolysis were not the only contributors to the inactivation of the microalgae. Although a UV 300 /chlorine treatment demonstrated the highest chlorine photolysis rate, the inactivation constant of this treatment was lower than that of UV 285 /chlorine. These results demonstrated a synergistic algicidal effect of the combined disinfection system caused by exposure to the 285 nm UV-LED and low dosages of chlorine, which could provide an important basis for further developments and possibly industrial applications in the future.
研究领域:
海洋生物学
·
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qi-Hua Yang,Gui-Hua Li,Yu-Chen Ao,Shu-Juan Zhao,Han-Qi Wei,Le Fu,Zhi-Wei Luo,Tian-Liang Zhou,Chu-Jie Wang,Ge-Mei Cai
As a new generation of environmentally friendly halide materials, Cs 3 Cu 2 I 5 shows up the promising application in scintillation, LED, and photoelectric detection fields. However, liquid phase methods cannot produce Cs 3 Cu 2 I 5 on a large scale, and the preparation process is accompanied by serious pollution. Although the ball milling method can solve the problems caused by the liquid phase synthesis method, the Cs 3 Cu 2 I 5 obtained has many surface defects and low luminescence efficiency. In this work, a strategy of doping-assisted ball-milling synthesis using ZnI 2 is proposed. Similar to the chemical preparation of Cs 3 Cu 2 I 5 , the iodine-rich environment during the modified ball milling process can also play a role in repairing surface defects. And it has been demonstrated through experiments and first principles calculations that the distortion of [Cu 2 I 5 ] 3- under ground/excited state can be adjusted through doping Zn into the Cu1 site, the formation barrier of self-trapped excitons is reduced, and the luminous efficiency of Cs 3 Cu 2 I 5 is significantly improved. Subsequently, using the simple hot-pressing method, the representative Cs 3 Cu 2 I 5 :1.0Zn sample was combined with commercially available polypropylene to fabricate Cs 3 Cu 2 I 5 :1.0Zn@PP film. Finally, the potential applications of the newly-developed film in portable and customizable WLED and scintillation fields were explored.
研究领域:
材料科学
·
光学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 16
·9244-9252
·
IF 3.049
Mao Xia,Simin Gu,Cheng Zhou,Longhai Liu,Yuan Zhong,Yongli Zhang,Zhi Zhou
Plant growth LEDs have attracted broad attention in modern society, desperate for specific phosphors with a characteristic emission band. A novel Mn4+ and Dy3+ co-doped Y3Al4GaO12 phosphor were successfully prepared through a conventional high-temperature solid-state reaction. A three band emission including red (625–700 nm), orange (550–607 nm) and blue (462–490 nm) is observed in these phosphors when excited under a near-UV lamp, which is ascribed to 2E → 4A2 of Mn4+, 4F9/2 → 6H15/2 and 4F9/2 → 6H13/2 of Dy3+, respectively. The three emissions match the absorption spectra of chlorophyll A and chlorophyll B well. Meanwhile, the energy transfer from Dy3+ to Mn4+ was confirmed by the luminescence spectra and lifetime analysis. Finally, an LED device was fabricated that consisted of a 365 nm ultraviolet chip and the Y3Al4GaO12:Mn4+,Dy3+ phosphor. The excellent properties indicate that the synthesized phosphor has a promising application in the optical agricultural industry.
研究领域:
材料科学
·
农业光学
·
植物生理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Jinze Lan,Liang Luo,Maomao Wang,Fan Li,Xiaoxia Wu,Fu Wang
CsPbX 3 (X = Cl, Br, I) perovskite colloids have attracted considerable attention because of their excellent optical properties , low-threshold lasing, and multicolor electroluminescence . Much work on synthesis and application of CsPbX 3 have been performed in the past several years. In this study, a novel robust one-pot synthesis method of CsPbBr 3 nanocrystals (NCs) was developed, in which all the precursors are heated together in a flask. Gram-scale CsPbBX 3 NCs with a fluorescence quantum yield of around 77% was achieved in a few minutes. A green light-emitting diode (LED) was fabricated by coasting CsPbBr 3 NCs on the surface of an industrially available blue chip. The fabricated LED emitted bright-green light with high color purity. This method provides a simple and efficient method for the large-scale preparation of high-quality CsPbBr 3 NCs, and might pave the way for their practical applications in green LEDs.
研究领域:
材料科学
·
纳米技术
·
光电
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Xin Xiao,Chunxia Zheng,Mingli Lu,Ling Zhang,Fei Liu,Xiaoxi Zuo,Junmin Nan
The selective oxidation of benzyl alcohol (BA) into benzaldehyde (BAD) is an attractive model reaction for organic synthesis. Using a microwave-calcination route, a novel flower-like Bi 24 O 31 Br 10 with surface oxygen vacancies and bromine vacancies was successfully synthesized. In the construction of Bi 24 O 31 Br 10 , glucose acts as a complexing, reducing, and structure-directing agent. The as-synthesized Bi 24 O 31 Br 10 exhibits excellent activity for the photocatalytic aerobic oxidation of BA into BAD, with >99% conversion and >99% selectivity under blue LED irradiation at ambient conditions, which is 3.3-, 4.7-, and 27.8-fold higher than that of TiO 2 , Bi 4 O 5 Br 2 , and Bi 12 O 17 Cl 2 , respectively. The high selectivity is due to the suitable energy band of the as-synthesized Bi 24 O 31 Br 10 (E g = 2.51 eV, valence band potential = +2.38 V), while the high conversion rate is largely due to the efficient separation of photogenerated carriers, surface defects, positively charge surface, and 3D micro/nano-architecture. The primary active species, including h + , e − , O 2 − , and OH, are all involved in the photoreaction. On the basis of experimental results and quantum-chemistry calculations, a direct hole oxidative mechanism with two-step dehydrogenation pathway was suggested. In addition, the as-synthesized Bi 24 O 31 Br 10 catalyst remains stable during the photocatalytic process, indicating its potential for practical applications.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 79
·50396-50402
·
IF 3.108
Shijie Qiu,Hengwei Wei,Mengmeng Wang,Shuai Zhang,Yang Zhou,Ling Xu,Xiaoming Wang,Huan Jiao
A novel ternary-alkaline red emitting fluoride phosphor K2NaGaF6:Mn4+ was successfully synthesized through co-precipitation method. The crystal structure, morphology, electronic band structure and luminescence properties of K2NaGaF6:Mn4+ phosphors were investigated in details by using Rietveld refinement of X-ray diffraction data, scanning electron microscopy (SEM), density functional theory (DFT) calculation and different reaction parameters. The K2NaGaF6 host has a cubic unit cell with the space group Fmm and lattice parameters of a = 8.2577 (4) Å, Z = 4, Vcell = 563.08 (8) Å3. Under blue light excitation, Mn4+ activated K2NaGaF6 exhibits a bright narrow-band red emission. The PL properties of the K2NaGaF6:Mn4+ red phosphors were optimized with different Mn4+ concentrations and aging times. A warm-white LED device was fabricated using a blue LED chip combined with commercial yellow YAG:Ce3+ phosphor and synthesized K2NaGaF6:Mn4+ red phosphor. The color rendering index (CRI, Ra = 81.6) and corresponding color temperature (CCT = 3643 K) easily reached the commercial warm white light LED standards (Ra > 80 and CCT < 4000 K). All these results indicate that K2NaGaF6:Mn4+ phosphor would be a suitable red phosphor candidate for warm-white LED applications.
研究领域:
材料科学
·
光学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xin Tong,Hongquan Yu,Xiangping Li,Sai Xu,Baojiu Chen
Owing to their environmental friendliness, structural tunability, and ability to emit self-trapped excitons, lead-free halide double perovskites (DPs) have demonstrated significant potential for applications in light-emitting diodes (LEDs) and photodetectors. However, their chemical and thermal stability is generally insufficient. These limitations hinder their practical application in LEDs, as these devices typically generate considerable heat under high operating currents and prolonged usage, particularly in the case of infrared LEDs. In this work, Er 3+ -doped double perovskites (Cs 2 NaYCl 6 and the Cs 2 NaYCl 6 @0.6 KBr composite) were synthesized via a hydrothermal method. The emission intensity of Cs 2 NaYCl 6 :2 % Er 3+ @0.6 KBr is five times greater than that of Cs 2 NaYCl 6 :2 % Er 3+ within the wavelength range of 1400–1600 nm. In the Cs 2 NaYCl 6 :Er 3+ @0.6 KBr composite, the surface defects of Cs 2 NaYCl 6 :Er 3+ were modified by the introduction of KBr, leading to an increase in the external quantum efficiency (EQE) of Cs 2 NaYCl 6 :Er 3+ from 9.5 % to 30.0 %. Under a 150 mA working current, the operating temperatures of the near-infrared (NIR) LED devices based on the Cs 2 NaYCl 6 :2 %Er 3+ and Cs 2 NaYCl 6 :2 %Er 3+ @0.6 KBr composite are 53.2 and 47.4 °C, respectively. After working for 2 h, the temperatures of the NIR LEDs based on Cs 2 NaYCl 6 :2 %Er 3+ and Cs 2 NaYCl 6 :2 %Er 3+ @0.6 KBr were 60.3 °C and 46.0 °C, respectively, under a 100 mA operating current.
研究领域:
材料科学
·
光学工程
·
固态照明技术
·
稀土发光材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Kaiyuan Deng,Yahong Jin,Lifang Yuan,Haoyi Wu,Yihua Hu
Phosphor-converted light-emitting diode (pc-LED) technology, as artificial lighting source, is the most promising option for providing power for plant growth in future smart agricultural factories. However, developing red phosphors with the desired emission spectral range and good thermal stability is still experimental. In this study, an Mn 4+ -doped BaZrGe 3 O 9 red-emitting phosphor with remarkable thermal stability is reported. The red emission, spanning the wavelength range of 600–800 nm, matches the absorption range of chlorophyll a, b and phytochrome (P r ). Its good thermal stability at 150 °C is in addition to its emission intensity, which is 81.7 % of its room-temperature intensity. Co-doping with Ca 2+ contributes to a 1.7-fold increase in the red emission intensity at room temperature. The encapsulation of the present phosphor onto UV LED chips produces red emitting LED devices, which can be used for garlic and corn cultivation. The implementation reveals that the six-hour artificial red light illumination supplement is the most effective and significant means to promote garlic and corn growth. The as-obtained red-emitting phosphor may be a promising candidate for pc-LEDs promotion of crop growth in agricultural factories.
研究领域:
农业工程
·
植物生理学
·
材料科学
·
光电技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Sheng Guo,Zhixiong Yang,Huali Zhang,Wei Yang,Jun Li,Kun Zhou
A simple sol-gel approach is proposed herein to fabricate CaFe 2 O 4 for the degradation of various organic pollutants (rhodamine B (RhB), tetracycline hydrochloride, humic acid, and methylene orange) under LED light irradiation mediated by peroxymonosulfate (PMS). The results indicate that the calcination temperature can significantly influence the performance of CaFe 2 O 4 for PMS activation, and the CaFe 2 O 4 sample obtained at 800 °C (CaFe 2 O 4 -800) exhibits the best efficiency in degrading RhB, which is much higher than that of Fe 2 O 3 -800. This can be attributed to the efficient separation of photogenerated electrons (e − ) and holes (h + ) by PMS, which is validated by transient photocurrent response and photoluminescence measurements. Results from density functional theory calculations indicate that the valence band of CaFe 2 O 4 -800 exhibits a high concentration of carriers and weak localization of electrons, which are favorable for PMS activation. Radical scavenging results confirm that h + and O 2 • − are the dominant reactive species. Moreover, CaFe 2 O 4 -800 not only demonstrated a stable performance during eight cycling runs with negligible iron leaching but also exhibited excellent degradation efficiency under natural water and sunlight. Finally, the mechanism and pathway of RhB degradation by the CaFe 2 O 4 -800/PMS/LED system are also proposed. This work presents the enormous prospect of CaFe 2 O 4 as an environmentally benign photocatalyst for PMS activation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）