Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Weirui Chen,Weijie Chen,Yimin Luo,Yanqi Feng,Xukai Li,Jing Wang,Ping Li,Liying Bin,Bing Tang,Laisheng Li
g-C 3 N 4 (CN) based catalysts were effective for photocatalytic ozonation (PCO), but their stability during reaction remained a mystery. This study investigated the change on PCO activity and stability of CN induced by F or I doping. Compared with CN, F-CN had the greater VB potential while I-CN had a greater CB position, which both led to their better O 3 activation. F-CN and I-CN PCO showed the greater oxalic acid (OA) degradation than that of CN PCO process. Though the enhanced activity, both F-CN and I-CN demonstrated the lower stability compared with that of CN. Because of the existing of reactive oxygen species (ROS) like •OH, •O 2 - and h vb + , CN, F-CN and I-CN were partially oxidized, generating NO 3 - and organic molecules such as cyanuric acid. h vb + and •OH mainly accounted for the decomposition of three CN. Triazine ring oxidation resulted in internal tearing and edge fracture as well as the formation of O-containing groups on all CN-based catalysts. O contents in catalysts initially increased and then decreased with reaction time, indicating that surface O-containing groups were unstable. The structural destroy could be eased with the present of organic pollutants. This study deepened the understanding of fate of CN based catalysts during PCO application.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Photonics Research
·
2021
·Vol. 2
·期 9
·2100066
·
IF 0
Jia-Li Yao,Zi-Xu Zhang,Xiao-Qi Sun,Tong Chang,Jing-Fu Guo,Ke-Ke Huang,Hai-Bo Zeng,Da-Yang Wang,Wen-Sheng Yang,Ruo-Sheng Zeng,Xiao-Ming Li,Ren-Guo Xie
Radioluminescence materials (scintillators) are widely investigated because of their potential application in many fields, such as medical imaging, security-related techniques, and nondestructive inspection. However, the fabrication of scintillator materials with simultaneously fast response time, high absorption coefficient, and high light yield, as well as low toxicity is still a challenge. Herein, the synthesis of Cu(I)-doped Cs 2 AgI 3 single crystals (SCs) with a 1D crystal structure is presented. A bright blue-green photoluminescence (PL) is observed after incorporating Cu + into the Cs 2 AgI 3 SCs under UV irradiation at room temperature. The PL quantum yield of the doped samples can reach up to 73% at a Cu + concentration of 0.66%. Experimental and theoretical studies show that the blue-green emission may originate from self-trapped excitons, which is further verified by photophysical results from control experiments on pure Cs 2 AgI 3 SCs. Upon X-ray excitation, Cu-doped SCs exhibit fast scintillation decay time (288 ns), high light yield (27 000 photons per MeV), and high absorption coefficient compared with the commercial product (CsI: Tl). These results suggest that Cu-doped Cs 2 AgI 3 is an ideal scintillator, which will be a promising candidate for potential application in dynamic real-time imaging and radiation detection.
研究领域:
材料科学
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医学成像
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辐射检测
✓ 已验证
产品关联
DOI
ACS Applied Materials & Interfaces
·
2017
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IF 7.504
Jiale Liu,Zhennan Wu,Ye Tian,Yanchun Li,Lin Ai,Tingting Li,Haoyang Zou,Yi Liu,Xindong Zhang,Hao Zhang,Bai Yang
Aggregation-induced emission (AIE) and self-assembly induced emission (SAIE) effects have been employed to tune the emission properties of metal nanoclusters (NCs). However, it is still not possible to further enhance the photoluminescence quantum yields (PLQYs) and control the emission colors of the NCs using AIE and SAIE. On the basis of our recent work studying the contribution of Cu(I) defects in the SAIE of Cu NCs, in this article, Au(I) was doped into Cu NC self-assembled nanosheets (NSASs) to construct a more stable Au(I)-centered state. As a result, the PLQYs, emission stability, and tunability of emission colors of the Cu NSASs were significantly improved. Detailed studies reveal that the doped Au(I) induces a Au(I)–Cu(I) metallophilic interaction, which leads to a ligand-to-Cu–Au charge transfer, which facilitates the relaxation of excited electrons via a radiative pathway, thereby enhancing the emission intensity. The charge transfer from Cu to Au lowers the energy, thus leading to the red-shift of PL emission. Au(I) is likely doped into the Cu NSASs rather than in individual NCs, because 0.3% Au doping is enough to alter the emission properties. By mixing Au(I)-doped Cu NSASs with different emission colors (due to different Au doping percentages) as color conversion materials on commercially available 365 nm GaN chips, a white light-emitting diode prototype is fabricated.
研究领域:
材料科学
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纳米技术
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光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 44
·10632-10639
·
IF 7
Lijia Yao,Bingquan Chen,Hailong Wu,Yuanjing Cui,Guodong Qian
Combination therapies are an increasingly important part of the antitumor medicine armamentarium. However, developing desirable nanomaterials for combination therapies is still a great challenge. Herein, a biocompatible Cu(I)-doped metal–organic framework (MOF) (denoted as CuZn-ZIF) is designed as a novel dual-functional nanocarrier. Doxorubicin molecules are covalently bound to the surface of the CuZn-ZIF and released by the cleavage of chemical bonds in an acidic environment, demonstrating the capacity of controlled drug release. More importantly, CuZn-ZIF nanocarriers can simultaneously play the role of nanocatalysts, capable of catalyzing H2O2 into a highly reactive intracellular toxic hydroxyl radical (˙OH). An in vivo study reveals that nanoparticles exhibit high antitumor efficacy through the combined performance of DOX and Cu(I), proving the great potential of this copper(I)-based MOF for combined chemo-chemotherapy to improve therapeutic efficacy.
研究领域:
纳米技术
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癌症治疗
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材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Wenxuan Deng,Xin Xiang,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jianmei Lu
Oily wastewater discharge from industrial activities and oil spills constitutes a crucial environmental issue exacerbated by the presence of water-soluble organic pollutants . Developing efficient superwetting membrane materials capable of separating oil and water while degrading water-soluble organic pollutants is therefore highly desirable. In this study, we prepared I-doped Bi 2 O 2 CO 3 /g-C 3 N 4 heterojunction structures using a hydrothermal method utilizing graphitic carbon nitride (g-C 3 N 4 ) as the carbon source, which were uniformly distributed on the mesh of Co 3 O 4 nanowire clusters to obtain the heterojunction membrane. The heterojunction membrane demonstrates superhydrophilicity and underwater superoleophobicity, with excellent separation efficiency and outstanding permeability for oil-in-water emulsions. Additionally, the membrane exhibits good stability, superior anti-corrosive property, remarkable reusability, and near-complete degradation of several water-soluble organic dyes under visible-light irradiation. Therefore, this study provides a novel design strategy for multifunctional membranes that achieve effective treatment of complex oil-containing wastewater.
研究领域:
环境科学
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材料科学
·
化学工程
·
水处理
✓ 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）