COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zujiang Liu,Xuehua Yuan,Tianhao Chen,Chongqing Yu,Luyan Xiong,Zhixuan Zeng,Zeyu Pan,Gnanasekar Sathishkumar,Jing Li,Jin Ye,En-Tang Kang,Liqun Xu,Xi Rao
The escalating levels of indoor bacterial contamination and air pollution considerably threaten public health. In this work, we synthesized a three-dimensional flower-like TiO 2 /g-C 3 N 4 nano-powder with a Z-scheme heterojunction structure, which demonstrated superior photocatalytic performance and efficient free radical generation capability, enabling effective mitigation of bacterial pathogens and indoor volatile organic compounds under low-power light irradiation. The material achieved 100% degradation of formaldehyde within 40 minutes under 420 nm LED irradiation. Antibacterial tests showed a 100% inactivation rate for S. aureus within 60 minutes and complete elimination of E. coli within 40 minutes. Characterizations and DFT calculations had confirmed the establishment of the Z-scheme heterojunction, which significantly decreased the band gap and improves the absorption of visible light. Concurrently, the efficient separation of charge carriers and the transfer of electrons facilitated the production of reactive oxygen species. In conclusion, this research presents a novel and environmentally sustainable approach to developing high-performance photocatalysts for applications in indoor environment improvement.
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2019
·Vol. 103
·期 3
·1798-1808
·
IF 3.094
Nan Zhou,Longhai Liu,Zhipeng Zhou,Ye Zhang,Minghui Li,Cheng Zhou,Mao Xia,Zhi Zhou
In the recent years, Mn 4+ -doped phosphors for indoor plant cultivation have received extensive concern owing to the far-red emission that can match well with the absorption spectra of plant pigments. Whereas, many Mn 4+ -doped phosphors still face some challenges such as poor light efficiency and low thermal stability. It is an effective way to resolve these problems via cation vacancies engineering. Herein, the Ca 14− x Al 10 Zn 6− y O 35 : Mn 4+ phosphors are successfully synthesized by combustion method. The luminescence intensity of Ca 14− x Al 10 Zn 6− y O 35 : Mn 4+ phosphor is enhanced through engineering Ca 2+ and Zn 2+ vacancies according to the charge compensation mechanism. The optimal content of each Ca 2+ and Zn 2+ vacancy is equal to be 0.3. Furthermore, the defect formation is accompanied with lattice distortion, which plays a vital role in driving the excited phonon traps to reduce the energy loss by non-radiation transitions. Therefore, the thermal stability of Ca 14− x Al 10 Zn 6− y O 35 : Mn 4+ phosphor is also improved via engineering cation vacancies. In addition, the Ca 14− x Al 10 Zn 6− y O 35 : Mn 4+ phosphors can be effectively excited by blue light and it exhibits far-red emission due to the Mn 4+ spin-forbidden 2 E → 4 A 2 transition. The results suggest that the Ca 14− x Al 10 Zn 6− y O 35 : Mn 4+ phosphors can have a tremendous potential in indoor plant cultivation.
研究领域:
材料科学
·
光学材料
·
园艺照明
·
固态化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhenyu Cheng,Shunan Wang,Jintang Zhou,Jing Yan,Yijie Liu,Jiaqi Tao,Zhenglin Liu,Lvtong Duan,Yi Yan,Junru Yao,Yucheng Wang,Weize Wang,Zhengjun Yao,Yao Ma
With the rapid popularization of the new generation of wearable flexible electronic products, to enhance the comfort and curved surface fit of the device, while reducing the impact of electromagnetic waves (EMW) emitted from each electronic component on the normal operation of the device, the design of high-performance flexible wave-absorbing composite materials is the key to solve the problem. In this paper, a carbon-fiber-dominated interface modification strategy is proposed based on the in-situ growth of ZIF-CoNi on the surface of carbon fiber as a carrier, and the generation of carbon nanotube arrays on the surface of the carbon fiber (CF) through high-temperature pyrolysis and metal atom-assisted catalytic generation to build up rich heterogeneous interfaces, which induces the generation of interfacial polarization and enhances the attenuation of electromagnetic waves. Melt extrusion was used to make the modified carbon fibers oriented inside the thermoplastic polyurethane (TPU) matrix, and the charge density and volume loss of the oriented and random distribution of carbon fibers in TPU were analyzed based on Comsol simulations. The effective absorption bandwidth of the CF/CoNi@C/TPU thermoplastic composite obtained by the 3D printing technique is 4.81 GHz at 2.14 mm thickness. It realizes the combination of microscopic interface modification design and modern processing engineering of 3d printing, which provides a new idea for the research and development of flexible wave-absorbing composites, and helps to promote the development of the new generation of wearable flexible electronic packaging field in the direction of multi-functional and high-performance.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2019
·
IF 10.159
Chun Sun,Zhiyuan Gao,Hanxin Liu,Le Wang,Yuchen Deng,Peng Li,Huanrong Li,Zi-Hui Zhang,Chao Fan,Wengang Bi
Blue-emitting perovskite nanocrystals (NCs) are known to exhibit low photoluminescence (PL) quantum yield (QY) compared to green- and red-emitting counterparts, which is due to the presence of localized trap states on the surface. Here, we demonstrate a new method to synthesize high-efficiency blue-emitting perovskite NCs by anion exchange of 0D and 3D perovskite NCs. The remarkable enhancement of the PL QY is caused by surface reconstruction and subsequent suppression of nonradiative recombination centers of 3D perovskite NCs during the anion exchange. Remarkably, these high-efficiency NCs have two appealing applications. First, they can be applied in backlight display, where the GaN light-emitting diode is usually used as the blue emission source. We found that the as-prepared NCs were facile to tune their emission peaks and possessed narrow linewidths. As a downconverter, the NCs realize an ultrapure blue light for backlight display. Second, benefiting from the existence of 0D perovskite, anticounterfeiting inks can also be achieved based on these blue-emitting perovskite NCs. The encoding/reading strategy relies on the conversion of 0D perovskites. These findings provide new opportunities for blue-emitting perovskite NCs and broaden their application.
研究领域:
材料科学
·
光学工程
·
纳米技术
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DOI
高影响因子
VACUUM
·
2023
·
IF 4
Yuanqing Zhou,Zunxian Yang,Qiaocan Huang,Yuliang Ye,Bingqing Ye,Zihong Shen,Wenbo Wu,Zhiwei Zeng,Zongyi Meng,Hongyi Hong,Songwei Ye,Zhiming Cheng,Qianting Lan,Jiaxiang Wang,Ye Chen,Hui Zhang,Tailiang Guo,Fushan Li,Yongyi Chen,Zhenzhen Weng
Metal halide perovskite quantum dots (QDs) have significant potential for application in light-emitting diodes (LED) owing to their superior optical properties . However, the dynamic instability of traditional oleic acid/amine ligands has a considerable impact on the optical and chemical properties of the surface. Additionally, one of its insulating qualities restricts the practical application of electroluminescent devices. In this case, the dual-function ligand DDA-MeS can passivate surface defects while also stabilizing chelation on QDs surface. As a result, the electrical performance of green QDs-LED devices is greatly enhanced, the external quantum efficiency is raised to 10.18%, the maximum brightness is also boosted to 8025 cd/m 2 , and the turn-on voltage is decreased to 2.5 V. This work also provides a novel strategy for the development of green LED devices with dual-function ligands that can be highly effective and bright.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
OPTICS EXPRESS
·
2023
·Vol. 31
·期 15
·24914-24925
·
IF 3.8
Zitong Liu,Le Zhang,Le Zhang,Le Zhang,Le Zhang,Jian Kang,Jian Kang,Tianyuan Zhou,Tianyuan Zhou,Shiwei Chen,Shiwei Chen,Peng Yang,Bingheng Sun,Yang Li,Hao Chen,Hao Chen,Hao Chen
Ceramic phosphors are widely considered the next-generation phosphor material for white LED/LD lighting, and a wide spectrum is a key factor in improving the CRI of lighting sources. In this paper, a novel, to our knowledge, barcode-structured YAG:Ce/YAG:Ce,Mn ceramic phosphor was designed and fabricated. The lighting sources with the CRI value of 73.5 and 68.9 were obtained under the excitation of blue LEDs and blue LDs, respectively. Simultaneously, thanks to the effective supplementary emission from a red LD, the CRI of the ceramic-based lighting source reached 81.8 under blue LD excitation. Specifically, the microstructure and luminescent property of ceramic phosphors with different thicknesses and ion doping concentrations were systematically studied. Besides, by changing the blue power from 0.52 W to 2.60 W, the CCT of the laser lighting source with the encapsulation of optimized YAG:Ce/YAG:Ce,Mn ceramic phosphors ranged from 3928 K to 5895 K, while the CRI always maintained above 80. The above results indicate that barcode-structured Ce:YAG/Ce,MnYAG ceramic phosphor is a candidate to achieve a high CRI and ican be applied to various lighting occasions.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhiwei Xia,Yuhan Wang,Rujun Yang,Mengdi Xu,Cunjian Lin,Zhongyuan Li,Ying Lv,Xiaopeng Chi,Shihai You
The interstitial site engineering that purposely creates interstitial luminescent centers in suitable hosts has become an intriguing strategy in designing novel inorganic phosphors. However, effectively tuning the photoluminescence of interstitial activators remains tough challenging at this stage. Here, we demonstrate the effective modulation of interstitial luminescence in inorganic phosphor. In detail, the blue emission band ( λ em = 446 nm) of interstitial Eu 2+ doped α -cristobalite (SiO 2 :Eu 2+ ) is largely enhanced and broadened via a partial, aliovalent substitution of Si 4+ by Al 3+ . After introducing Al 3+ ions into SiO 2 lattice, the full width at half maximum of the blue emission band increase from 59 to 76 nm with a triple growth in quantum efficiency (10.82% → 35.56%). Moreover, the thermal stability improves significantly with a high emission retention of 60% at 325 °C (SiO 2 :0.06Al 3+ ,0.005Eu 2+ ), far higher than that of the parent SiO 2 :0.005Eu 2+ (30%). Encapsulating blue-emitting SiO 2 :Al 3+ ,Eu 2+ along with two commercial green and red phosphors on an ultraviolet LED chip ( λ em = 375 nm), a white LED device with high color rendering index (Ra > 90) was successful fabricated, showing the great potential of this phosphor for achieving high-quality white LED lighting. This study not only provides a promising bule emitter but also sheds light on modulating interstitial luminescence properties in inorganic phosphors.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
Applied Materials Today
·
2024
·
IF 7.2
Huajiang Hu,Jiurong Li,Xiao Gong
Due to their unique fluorescence properties and wide range of applications, carbon dots (CDs) have emerged as a prominent research subject. Acid reagents have traditionally been regarded as versatile means to facilitate the carbonization and polymerization of CDs, resulting in increased carbonization and polymerization levels, which in turn cause a redshift in the luminescence of CDs. However, there has been limited investigation into the impact of excess acid reagents on CDs luminescence. In this study, we discovered that the addition of excess acid reagent, in the presence of oxygen-containing functional groups, does not enhance the graphitization of CDs, but rather, it has the opposite effect. Excess acid reagents prevent CDs polymerization and reduce the content of graphite-N in the CDs. Simultaneously, excess acid reagent leads to an increase in oxygen-containing functional groups on the surface of the CDs, resulting in a blueshift in luminescence. Building upon these findings, we have devised a synthesis scheme for full-color CDs that cover nearly the entire visible light spectrum. Furthermore, leveraging the diverse color range, we have also employed these CDs for anti-counterfeiting encryption and LEDs applications.
研究领域:
材料科学
·
光学
·
化学
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DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2021
·Vol. 10
·期 5
·055011
·
IF 2.07
Jian Zhang,Ming Wang,Zhiyong Fang,Xiaohui Lai,Zhiqiang Zhong,Rui Zhang
Bi3+-activated luminescence materials have gained growing attentions for optoelectronic applications. In this work, a novel BaLu2MgGa2Si2O12: Bi3+ garnet phosphor was synthesized through a traditional high-temperature solid phase reaction method. The crystal structure was ascertained through X-ray diffraction analysis and Rietveld structural refinement. The particle morphology and constituent elements distributions were investigated through scanning electron microscope and element mapping. Excited at 330 or 370 nm, the phosphors exhibit two emission peaks located at 413 and 495 nm, which is ascribed to the allowed transitions of Bi3+: 3P1 → 1S0. The luminescence intensity reaches the maximum at the 4 mol% Bi3+ doping content, and the emission color is easily manipulated by tuning the excitation wavelength. Besides, the luminescence intensity at 150 ℃ remains 80% of that at room temperature. These results suggest that the novel phosphors have promising application in the near-UV excited white LEDs.
研究领域:
材料科学
·
光学
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DOI
高影响因子
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES
·
2023
·Vol. 78
·期 10
·921-926
·
IF 1.8
Cong Liu,Junshen Xing,Zheng Liu,Wenlin Feng
BaSr 2 (PO 4 ) 2 : 4 %Eu 3+ , 4 % A ( A = Li + , Na + , K + ) phosphors were prepared by high-temperature solid-phase method. The crystal structure, photoluminescence properties, thermal stability, chromaticity coordinates, and fluorescence lifetime of the samples were investigated. The excitation and emission spectra of the samples are broadbands and the maximum peak of the emission spectrum is located at 619 nm. Among three charge compensators, the luminescence intensity is optimal for Li + co-doping case, and the quenching temperature of the typical sample is about 500 K. the fluorescence lifetime
τ
is 1469.6 ns, and the chromaticity coordinates exhibit a strong red emission. The present phosphor has a potential application for white light-emitting diodes (LEDs) under the near-ultra violet (n-UV) light excitation.
研究领域:
材料科学
·
光学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 28
·期 13
·9464-9470
·
IF 2.019
Xing Yangyang,Zhu Yingchun,Chang Chengkang,Wang Yunli,Wang Yang
Eu 2+ -doped β-Sialon phosphors with a composition of Eu
x
Si 5 Al 1− x
O z+ x
N 8−z− x
( x = 0.05, 0.06, 0.07) were synthesized in a new synthetic route using novel raw materials, such as nano-silicon dioxide (SiO 2 ), nano-carbon (C), and aluminum (Al). This is different from the prevailing method using Si 3 N 4 , AlN, and Al 2 O 3 to obtain β-Sialon phosphors. Compared with the conventional method, lower cost raw materials, simpler pretreatment and a relatively shorter reaction time are achieved. The phosphors show a high purity. All the phosphors exhibit green emission under ultra violet (UV) radiation. A broad band of excitation spectra implies the promising application in UV ray based green light-emitting diode (LED). Chromaticity coordinates of the β-Sialon: Eu 2+ phosphors demonstrate that it is accessible to obtain different green emissions from single phase of Eu 2+ -doped β-Sialon through adjusting Eu 2 O 3 concentration. Furthermore, the Eu
x
Si 5 Al 1− x
O 1 + x
N 7 − x
( x = 0.05) shows a better thermal stability than the commercial green-emitting silicate phosphor. These results indicate a promising prospect for this efficient and economic route in preparing β-Sialon: Eu 2+ phosphors, and the phosphors are a highly promising candidate for LED applications.
研究领域:
材料科学
·
光学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Xiaoshuang Li,Chengjue Guo,Hongwei Wang,Yeqing Chen,Jiangcong Zhou,Jun Lin,Qingguang Zeng
By hetero-valence substituting Ba 2+ -Si 4+ for Lu 3+ -Al 3+ pair in Lu 3 Al 5 O 12 : Ce 3+ , a new green phosphor Ba 1.5 Lu 1.5 Al 3.5 Si 1.5 O 12 : Ce 3+ (BLAS: Ce 3+ ) has been obtained. It crystallizes in garnet structure with space group Ia -3 d (230). In the structure, Ba 2+ ions are incorporated into both dodecahedral Lu 3+ and octahedral Al 3+ sites while Si 4+ ions only occupy tetrahedral Al 3+ sites. Under the blue light irradiation of 450 nm, an intense green light peaking at 520 nm was observed and the PL spectrum can be fitted in two Gaussian components, due to the crystal field splitting of Ce 3+ 5 d states under D 2 symmetry constrains. The optical doping concentration of BLAS: Ce 3+ is 6% mol, of which the IQE and EQE are 89.1% and 51.8%, respectively. Furthermore, this sample exhibits an extremely good thermal stability, i.e. the integrated emission intensity is still more than 90% of the initial intensity at 480 K. Then, a w-LED device was fabricated from this new green phosphor BLAS: Ce 3+ and commercial red phosphor (Ca,Sr)AlSiN 3 : Eu 2+ , which shows a quite high color rendering (Ra = 88.2) and a relatively low color temperature 4772 K. Besides, the phosphor exhibits a stable chromaticity under different acceleration voltages. The phosphor may be promising material for the development of solid-state lighting and display systems.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）