RARE METALS
·
2024
·
IF 9.6
Hu Xiao-Jie,Sun Yu-Han,Liu Ling-Yue,Mao Dan-Jun,Zheng Shou-Rong
Monochloroacetic acid (MCAA) is identified as a highly carcinogenic disinfection by-product in chlorinated drinking water. In this study, a series of CeO 2 -supported Pd catalysts (Pd/MCeO 2 ) were synthesized through one-step calcination of Pd-loaded Ce-UiO-66-BDC (Ce-MOF), and the liquid-phase catalytic hydrodechlorination of MCAA was explored using these catalysts. For comparison, Pd/CeO 2 catalysts were additionally synthesized using the conventional impregnation method. The characterization results reveal that the catalysts exhibit strong metal–support interaction, leading to high Pd dispersion and Pd n + content. Additionally, the calcination temperature significantly influences catalytic performance, with the catalyst calcined at 500 °C (Pd/MCeO 2 -500) demonstrating the highest catalytic activity and achieving complete dechlorination of MCAA within 50 min. Furthermore, it is found that the catalytic MCAA hydrodechlorination using the catalysts adheres to the Langmuir–Hinshelwood model. Accordingly, low reaction pH is favorable for the catalytic hydrodechlorination of MCAA, enhancing MCAA adsorption on the catalyst surface due to the electrostatic interaction between MCAA and the catalyst surface. Theoretical results suggest that the presence of Pd n + efficiently facilitates MCAA adsorption and C–Cl cleavage, thus significantly enhancing the liquid-phase catalytic hydrodechlorination. Graphical abstract
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Feng Gao,Jingcun Shao,Yanting Tang,Yajie Tian,Lin Sun,Xin Yu
To address the escalating concerns related to organic pollutions in aquatic environments, there is an urgent demand for exploring an efficient and eco-friendly method for the removal of organic pollutants. In this work, porous Cl-C 3 N 4 (ClCN)and step-scheme (S-Scheme) Cl-C 3 N 4 /WO 3 (ClCN/WO 3 ) composites have been designed and fabricated through a facile calcination approach for tetracycline removal under visible-light irradiation. The synthesized S-Scheme ClCN/WO 3 composites exhibited porous structures, though their visible-light absorption was lower compared to the ClCN and C 3 N 4 samples. The surface areas of the ClCN/WO 3 composites can reach 81.43 m 2 g −1 , significantly higher than that of the ClCN and C 3 N 4 samples. These composites also demonstrated prolonged carrier lifetime and improved charge separation efficiency, primarily due to the formation of S-Scheme heterostructures. Among the prepared samples, the ClCN/WO 3 -2 composite demonstrated the highest photocatalytic activity with a rate constant reaching 0.0547 min −1 , approximately 4.56 times that of pristine C 3 N 4 . Additionally, when applied to tetracycline degradation in simulated seawater, the ClCN/WO 3 -2 composite achieved a rate constant of 0.047 min −1 , outperforming the C 3 N 4 and ClCN samples. Mechanistic studies showed that the S-Scheme heterostructures markedly promoted charge separation and tetracycline degradation. Furthermore, the ClCN/WO 3 composites contributed to a reduced the biological toxicity of the degraded intermediates. This study underscores the immense potential of ClCN/WO 3 composites as high-performance photocatalysts for the photodegradation of organic pollutants under visible-light irradiation.
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RSC Advances
·
2023
·Vol. 13
·期 9
·5993-6001
·
IF 3.9
Zhi Jiang,Hezhuang Liu,Jihua Zou,Yixuan Huang,Zhaoquan Xu,Denys Pustovyi,Svetlana Vitusevich
High-quality CsCu2X3 and Cs3Cu2X5 (X = Cl, Br, I) nanocrystals (NCs) exhibit excellent optoelectronic, physical, and chemical properties for detection of UV radiation due to large carrier mobility and lifetime, and heavy atoms. The nanocrystal materials can be prepared via a low-cost and simple solid-state synthesis. However, poor reproducibility and complex synthesis methods of obtaining perovskite NC thin films represent a drawback for the fabrication of the commercial photoelectric device. To address these issues, we develop highly stable CsCu2X3 and Cs3Cu2X5 NC materials using a facile solid-state reaction method for the scale-up production of halogen lead-free perovskites. We suggest a distinctive way to design a series of nanocrystalline perovskites using short-term synthesis and study the mechanism of perovskite formation using thermal solid-state synthesis. These all-inorganic and lead-free CsCu2X3 and Cs3Cu2X5 exhibit large photoluminescence quantum yields (PLQYs) up to 95.2%. Moreover, flexible paper photodetectors based on this series of lead-free perovskites show strong photoselectivity and bending stability at 254 nm, 365 nm, and 405 nm wavelengths. High-quality responses with a responsivity of 1.1 × 10−3 A W−1 and detectivity of 2.71 × 109 jones under UV illumination (10 μW cm−2) at a bias voltage of 5 mV are demonstrated. These results open prospects for designing photodetectors, LEDs, and other photosensitive devices.
研究领域:
材料科学
·
光电技术
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·
IF 7.2
Ning Gao,Yike Yao,Yunbo Wang,Mengjie Fan,Xiaoqian Peng,Yingwen Chen
In high-viscosity, metal salt-based deep eutectic solvents (DESs), strong hydrogen-bonding interactions frequently hinder mass transfer, limit ROS formation, and reduce synergistic catalytic activity. To address these challenges, a low-viscosity DES incorporating Brønsted-Lewis acidic sites was synthesized from FeCl₃·6H₂O and propionic acid. In this configuration, solid PMS acts as a slow-release oxidant, thereby preserving the DES’s functional integrity and sustaining its catalytic efficiency. Characterization and oxidative desulfurization evaluation revealed alternating Fe ion redox states within the DES, along with a dual cyclic reaction pathway involving the regeneration of Cl⁻ and Cl radicals. The electron-transfer activity of Cl radicals not only generates multiple reactive oxygen species (·ClO and ·O 2 ⁻) but also modulates the nucleophilic and electrophilic reactivity of organosulfur compounds. Under mild conditions at 40 °C, the catalytic system achieves over 99.7% desulfurization of model oil containing up to 1500 mg kg -1 sulfur within 20 minutes, while demonstrating excellent recyclability over seven consecutive cycles. DFT analyses indicate that radical oxidation serves as the dominant pathway for thiophene sulfone formation, with perpropionic acid playing an auxiliary role by extending the lifetime of reactive oxygen species and enhancing the oxidation process. Overall, the controlled release of solid PMS reduces impurity effects on the DES, while radicals and reactive oxygen species promote S-O bond formation and the removal of organosulfur compounds from the oil phase.
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Science China-Materials
·
2020
·Vol. 64
·期 1
·158-168
·
IF 6.098
Fang Cong,Li Ye,Cai Yuting,Zhou Tian-Liang,Tang Xueyuan,Xie Rong-Jun
Cesium lead halide perovskite nanocrystals (NCs) have attracted unprecedented attention owing to their compelling properties for optoelectronic applications. Compared with the classical hot-injection method, the room-temperature (RT) synthetic strategy is more facile and tender, but it is hard to obtain stable CsPbI 3 NCs and it usually uses polar solvents that sometimes reduce the stability and properties of NCs. Here, we reported a simple approach to synthesize highly efficient and stable CsPbI 3 as well as other color-tunable CsPbX 3 NCs with high quantum efficiency at room temperature via an anion exchange at the water-oil interface, in which the as-synthesized pristine CsPbBr 3 NCs in toluene were treated in aqueous solutions of HX (X=Cl, Br, and I) and protonated oleylamine (OAm) acted as a carrier. The synthesized CsPbI 3 NCs had an emission at 680 nm and even showed excellent colloidal stability after being stored for 32 d. The high efficiency and stability of the obtained CsPbX 3 NCs were ascribed to the facts that: (i) the polar reagents were almost removed from the surface of NCs; (ii) the defect-related nonradiative recombination was suppressed efficiently by surface passivation.
研究领域:
纳米材料
·
光电子学
·
钙钛矿化学
·
胶体合成
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高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 23
·7893-7905
·
IF 4
Lingjun Shu,Jingxuan Yin,Zhemin Gon,Chengwei Gao,Yongxing Liu,Xiaolong Zhou,Hongli Ma,Xianghua Zhang,Xiang Shen,Shixun Dai,Changgui Lin,Qing Jiao
The fabrication of all electrolytes from noncombustible ceramic materials offers a superior option for providing safer and higher-capacity batteries to fulfill future energy needs. To achieve a competitive performance with combustible liquid electrolytes used in commercial Li-ion batteries, the creation of ceramic material compositions with a high electrical conductivity is necessary. Here, we report that co-doping with W and halogens results in a superconductivity of 13.78 mS cm−1 in a cubic-phase Na3SbS4 glass ceramic electrolyte. After undergoing high-temperature heat treatments, the W ions in the electrolyte can facilitate the replacement of S atoms with halogens, introducing many Na vacancies. The samples also had a high degree of cycling stability. An excellent glass ceramic electrolyte for Na ion batteries will be constructed for Na3SbW0.25Cl0.25S4.
研究领域:
材料科学
·
电化学
·
固态离子学
·
能源存储
·
无机非金属材料
·
电池技术
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高影响因子
CHEMISTRY OF MATERIALS
·
2022
·
IF 10.508
Ruiwen Ji,Meng Lei,Cécile Genevois,Wenda Zhang,Xing Ming,Lunhua He,Mathieu Allix,Congling Yin,Xiaojun Kuang,Xianran Xing
Layered materials coupling a two-dimensional strong-bonding layered network with much weaker van der Waals (vdW) interaction between the layers are sought after for the development of nanoelectronics and energy conversion devices. It is important to elucidate the layer stacking rules in these vdW materials and control the thickness of the strong-bonding layers for tuning the nanosheet height during exfoliation and therefore tailor physical properties. Here, we show that the single Bi2O2Se ionic layer in the three-anion vdW semiconductor Bi4O4SeCl2 showing extremely low thermal conductivity can be expanded to higher-order layers forming a homologous series Bi2+2nO2+2nSenX2 (X = Cl, Br) with variable ionic layer thicknesses. Bi4O4SeX2 (n = 1) and Bi6O6Se2X2 (n = 2) were isolated as single-phase materials, while materials with larger layer thicknesses such as Bi8O8Se3Cl2 (n = 3) contain different defect-intergrowth structures at the crystallite scale. The anionic disorder of Se and X within the Bi2O2Se and Bi2O2X2 slabs is a critical factor in the stabilization of Bi2+2nO2+2nSenX2. The ∼50% Se substitution by X anions in the Bi2O2Se slab as related to the weak interlayer interaction can serve as a stabilization criterion of Bi2+2nO2+2nSenX2. All of these materials show similar optical indirect band gaps of ∼1.05 eV, originating from the electronic states in the Bi2O2Se slabs. Pellets prepared from these vdW materials possessed low bulk resistivities (100 Ω·cm) and exceptionally low and tunable thermal conductivities (0.66 W/mK and lower) parallel to the pressing axis of the pellets (heavier the halogen is, lower is the thermal conductivity). The results presented here provide important multiple anion chemistry for tailoring the ionic-bonding network into different thicknesses in the vdW layered structures and therefore their physical properties.
研究领域:
材料科学
·
化学
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高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Yan Yuxin,Zou Ailing,Wang Yiyan,Zhang Yanjie,Yu Jingjie,Xiao Zhiguo
CsPbX 3 (X = I, Br, Cl) perovskite quantum
dots (PQDs)
are promising for optoelectronic applications owing to their tunable
bandgap, high photoluminescence (PL) quantum yield, and narrow emission
bandwidth. However, CsPbBr 3 PQDs exhibit a large Stokes
shift (>155 nm) and are mainly excited by near-ultraviolet light
(∼365
nm), resulting in substantial energy loss and limiting their compatibility
with blue light-emitting diodes (LEDs) excitation. Herein, Sr 2+ /Cl – codoped CsPbBr 3 PQDs embedded
in zinc borosilicate (ZBS) glass powders were developed to regulate
the band structure. Sr 2+ incorporation significantly enhances
PL performance. Notably, CsPb 0.5 Sr 0.5 Br 3 PQDs exhibit ∼1.6 times higher PL intensity than undoped
samples with a slight red-shift (∼5 nm). Meanwhile, the bandgap
of CsPb 0.1 Sr 0.9 Br 3 PQDs is widened
to 3.12 eV compared to 2.36 eV for CsPbBr 3 . Totally different
with undoped PQDs, the excitation peak of CsPb 0.1 Sr 0.9 Br 3 PQDs covers the desired blue-violet region
in the range of 400–480 nm and the maximum peak is located
at 414 nm, which displays a narrow Stokes shift of 106 nm. Further,
Cl – ions substitution in Sr-doped host materials
enables the blueshift of the PL emission from 521 nm (green light)
to 448 nm (blue light) via bandgap engineering accompanied by ultranarrow
Stokes shift of ∼34 nm for CsPb 0.1 Sr 0.9 BrCl 2 sample. The Sr-doped PQDs embedded in ZBS glass
also demonstrate excellent water resistance, retaining ∼96%
of their initial PL intensity after immersion in deionized water for
more than 60 days. Thus, the ultrastable PQDs glass powders can be
effectively excited by the blue-violet light chip (410 nm-460 nm)
via bandgap engineering possess and demonstrate promising application
potential in color-conversion display devices, wide-color-gamut backlight
systems and screen-printable emissive display films.
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Xiaodong Chen,Jing Liao,Ke Yin,Lu Cheng,Zhewen Yang,Zewei Liu,Bichun Huang
Carbon materials derived from single biomass feedstock typically have serious defects such as low porosity and poor distribution of functional groups. In this work, a series of porous carbons with different mass ratios of porphyra and corn stalk (7:3, 1:1, and 3:7) were prepared by ingeniously utilizing co-pyrolysis coupled with KOH activation. The prepared porous carbon samples were characterized by N 2 adsorption/desorption isotherms, Field emission scanning electron microscopy, Transmission electron microscopy, X-ray diffraction, Raman spectroscopy, Elemental analysis, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and Thermo-gravimetric analysis. Results showed that the prepared CPPC73 possessed excellent adsorbent properties, including high specific surface area (2719 m 2 /g), large pore volume (1.225 cm 3 /g), hierarchical porous structure, and optimal distribution of N-containing functional groups. Chlorobenzene (CB) dynamic adsorption experiments indicated that CPPC73 had higher adsorption performance (1134 mg/g) than unmodified POPC (795 mg/g). A combination of density functional theory (DFT) calculations, correlation analysis, and Grand canonical Monte Carlo (GCMC) calculations was performed to clarify the CB adsorption mechanism. Correlation analysis and GCMC calculations confirmed that pores in the range of 0.7–2.0 nm were the best adsorption sites for CB. Furthermore, DFT calculations indicated that N/O-containing functional groups on the carbon surface enhanced the interaction between porous carbon and CB, especially the pyrrolic-N. This work offers a new strategy to convert waste seaweed into a high-performance adsorbent for Cl-VOCs removal.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2021
·
IF 4.076
Jinhui Wang,Xinyuan Zhang,Fei Liang,Zhanggui Hu,Yicheng Wu
Recently, neutral cyanurate acid and negative (iso-)cyanurates (HxC3N3O3)(3–x)– (x = 0–2) with strong conjugated π-bonds have been proposed as a new possible type of structural motifs for exploring high-performance birefringent materials. Especially, ionic cocrystals (ICCs) with neutral H3C3N3O3 molecules have attracted much attention due to their extended ultraviolet transparent range and concurrently improved birefringence. Herein, three ICC single crystals, RbCl·(H3C3N3O3)2 (I), CsCl·(H3C3N3O3)2 (II), and RbBr·(H3C3N3O3)2 (III), combining cyanurate acid and alkali halides have been designed and synthesized in ethanol solution. They simultaneously exhibit wide band gaps more than 5.4 eV, large birefringence (Δnexp ≈ 0.096–0.115, Δncal ≈ 0.071–0.105 at 800 nm), and high thermal stability above 325 °C. In addition, theoretical calculations have also been performed to evaluate the relationship of the molecular arrangement and their anisotropic optical properties. This work suggests that cyanurate-based cocrystals could be a promising structural family for the discovery of ultraviolet birefringent crystals.
研究领域:
材料化学
·
光学材料
·
晶体工程
·
无机化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yuran Li,Zhicheng Xu,Jian Wang,Bin Wang,Tingyu Zhu
Activated carbon exhibits a high adsorption capacity for chlorinated volatile organic compounds (Cl-VOCs), while the desorption of Cl-VOCs is not desirable in the thermal regeneration progress of activated carbon. Chlorobenzene was selected as the model substance to explore whether Cl-VOCs can be oxidized as expected in the regeneration atmosphere of O 2 -free at the temperature range of 150–450 °C. The modification of activated carbon by Cu or Fe has been shown to considerably improve the decomposition activities. According to the breakthrough curves and detection results from XPS and in situ DRIFTS, the decomposition mechanism of C 6 H 5 Cl on Cu and Fe active sites is illustrated. The adsorbed C 6 H 5 Cl is firstly dechlorinated to form C 6 H 6 and *Cl, and then it was found there are two pathways for the C 6 H 6 oxidation. C 6 H 6 is indirectly oxidized to form C 6 H 5 OH and benzoquinone species, or directly ring-opened to generate ethylene and 1,3-butadiene, and further oxidized to produce CO 2 , CO and H 2 O. The C 6 H 6 oxidation is determined by the decomposition of acetate on Cu/AC, but the decomposition of benzoquinone and maleate on Fe/AC. The Fe 3 O 4 and Fe 2 O 3 active sites have a higher dechlorination activity but accelerate the deposition of FeCl 2 , FeCl 3 and organic Cl-containing components. The CuO active center has a higher oxidation performance with a higher CO 2 selectivity. About 83.0–83.5% of adsorbed chlorobenzene has been oxidized, and the main Cl-containing product is HCl accounting for approximately 77.8–81.0%, a small amount of Cl forms polychlorinated organic compounds or metal chlorides occupying 2.0–5.7%. As the regeneration temperature decreases, the total amount of Cl-containing species is reduced due the lower oxidation and dechlorination activity of catalysts. The decomposition products of Cl-VOCs in the thermal regeneration process of activated carbon were clarified and quantified, which provides a theoretical basis to control Cl-VOCs in regeneration gas.
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高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Hao Xiong,Hanyou Zhang,Baisheng Sa,Ping Li,Lingyan Lin,Aijun Yang,Jiansheng Li,Jinquan Hong,Linqin Jiang,Yu Qiu
All-inorganic halide perovskite nanocrystals (PNCs) have attracted extensive attention due to their potential for the next-generation displays. The ammonium and halide composition affect strongly the photoelectrical properties and the long-term stability of PNCs. In this work, we present a novel class of mixed all-inorganic (Cs,NH 4 )Pb(Br,X) 3 (X = Cl, Br, I) NCs prepared via cation/anion co-exchange reaction between CsPbBr 3 NCs and the mechanochemically reacted NH 4 Pb n X 2n+1 (X = Cl, Br, I, n = 1 or 2) powders. The cubic morphologies of (Cs,NH 4 )Pb(Br,X) 3 NCs with different halogen element combinations were successfully obtained. In the meanwhile, the extended emission ranges from deep-blue (453 nm) to warm-yellow (564 nm). Higher PLQY and higher stability against ambient air and UV light were achieved simultaneously by controlling the ion co-exchanging process. The photoluminescence quantum yield (PLQY) of (Cs,NH 4 )Pb(Br,X) 3 (X = Cl, Br, I) NCs were also significantly enhanced compared with that of pure CsPbBr 3 after ions exchanging (>85% versus 58%). In addition, the stability of (Cs,NH 4 )Pb(Br,X) 3 (X = Cl, Br, I) NC thin films under the UV-irradiation and in the ambient atmosphere were also dramatically improved. The cation/anion co-exchanging synthetic strategy developed in our research provides a new pathway to modulate and realize mixed-ion PNCs with high optoelectronic performance.
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