CHEMISTRY OF MATERIALS
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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.
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高影响因子
Journal of Environmental Chemical Engineering
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2024
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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.
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高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 23
·7893-7905
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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.
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高影响因子
COMBUSTION AND FLAME
·
2025
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IF 6.2
Zhiyuan Feng,Yunjie Liu,Yajing Xiao,Yunlong Zhang,Ruixuan Xu,Qi-Long Yan,Hongqi Nie
s High burning rate pressure exponent and incomplete combustion of Al constrains the further application of the composite propellant containing CL-20. In this study, various Al@CL-20 composites constructed by spray-drying method were applied to modify the HTPB/AP/Al/CL-20 propellant through interfacial control and synergistic effect of catalysts (GO CHZ-M, M =Co 2+ or Ni 2+ ) without changing the propellant formulations. The results show that the modified propellant have a greater heat of reaction (5977 J g -1 , increased by 7.3 %), a reduced ignition delay time of 477 ms, an 32.1 % increase in the burning rate at 1 MPa, and the pressure exponent decreased from 0.49 to 0.15 within 0–2 MPa (about 69.4 % reduction), the mechanism can be attributed to the catalytic decomposition of CL-20 and AP by the presence of GO CHZ-M. Moreover, the agglomeration of Al was remarkably inhibited by interfacial control and precise catalysis, the proportion of condensed phase combustion products with particle size larger than 10 μm decreased from 35.1 % to 23.4 %, while the active Al content in the products declined significantly, indicating that the combustion efficiency of the propellant was greatly improved.
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高影响因子
Science China-Materials
·
2020
·Vol. 64
·期 1
·158-168
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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.
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高影响因子
Green Energy & Environment
·
2026
·
IF 16.7
Na Wang,Wenting Lu,Fengyan Han,Weiping Xiao,Xiaofei Yang
The electron density of Ce active center is modulated via constructing the Ce–O–Bi configuration in Ce-doped BiOX (X = Cl, Br, I). • Halogen-induced differences in electronegativity and ionic radius effectively modulate Bi–O lattice symmetry and electronic properties. • The optimal 2.5%Ce-BOB catalyst delivers excellent H 2 O 2 selectivity, high production yield and favorable 2e - ORR kinetics. • In-situ electro-generated H 2 O 2 realizes efficient electro-Fenton degradation of organic dye pollutants. The selectivity of two-electron oxygen reduction reaction (2e - ORR) is predominantly determined by the adsorption strength of the key intermediate *OOH on the catalyst active sites, which has often been tuned by 3d transition-metal doping. Herein, we fabricate rare earth Ce doped bismuth oxyhalide (BiOX, X = Cl, Br, I) catalysts. The built in Ce–O–Bi local configuration triggers efficient charge rearrangement and tunes the surface electron density of Ce active centers. Meanwhile, the differences in ionic radius and electronegativity among halogen species can modulate the symmetry of the Bi–O lattice, thereby forming a typical volcano-type correlation between the bond length and 2e - ORR catalytic performance. The synergistic effect of Ce doping and halogen modulation endows the 2.5%Ce-BOB catalyst with optimal 2e - ORR performance. It delivers a H 2 O 2 selectivity of over 90% within the potential range of 0.2-0.6 V and achieves a H 2 O 2 production rate of 2631.4 mmol g -1 h -1 at 0.1 V. Furthermore, this optimized catalyst demonstrates potential application in organic wastewater treatment, where the degradation efficiency of methylene blue (MB) reaches approximately 95% in 40 min and that of rhodamine B (RhB) approaches 99% in 15 min. This work provides new insights into the rational design of electrocatalysts and environmental applications of electrosynthesized H 2 O 2 via the synergistic regulation of rare-earth metal doping and halogen modulation. The synergistic strategy integrating Ce-doping and halogen modulation finely tailors the electronic environment of Ce active centers, endowing the 2.5%Ce-BOB electrocatalyst with favorable H 2 O 2 selectivity, considerable production capacity and effective electro-Fenton degradation of organic dyes. Download: Download high-res image (284KB) Download: Download full-size image
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高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Peng Wu,Yuanyuan Ma,Hongyu Wang,Jianghong Wu,Sheng Fan,Yu Zheng,Yongfeng Li,Lifeng Ding
The electrochemical oscillation (EO) exhibited by Cu anodes during dissolution in H 3 PO 4 /Cl - mixed electrolytes significantly influence the efficacy of processes such as metal surface treatment, precision electroplating, and electrochemical mechanical polishing(ECMP). While Cl - ions have been identified as the key factor inducing oscillations, the mechanism governing their interaction with coexisting cations remains unclear. This study, integrating electrochemical analysis, anodic film surface characterisation, and density functional theory (DFT) calculations, reveals the decisive regulatory role of cations in oscillation mechanisms and corrosion film properties. The findings indicate that, when the influence of Cl - ion concentration is excluded, Na + ions primarily fulfil charge-balancing functions, while Ni 2+ and Al 3+ ions exert synergistic regulatory effects at the active interface. Ni 2+ ions form pure CuCl films through strong adsorption, prolonging oscillation periods. Conversely, Al 3+ ions promote the formation of CuCl/Cu(II)/AlO 4 /Al(OH) x composite films, accelerating film dissolution and shortening periods. The specificity of cations directly determines the stability and dissolution kinetics of films on the Cu anode surface. This study establishes the role of cations as key variables in the electrolytic process, providing a theoretical foundation for understanding EOs and passivation mechanisms.
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高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2022
·Vol. 97
·期 10
·2805-2814
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IF 3.709
Shuaibin Zhang,Bochao Yan,Zhihui Chen,Suping Zhang
BACKGROUND Levulinic acid, an important platform compound, is extensively used in textiles, dyes, antifreeze, animal feed, solvents and food additives. However, the use of lignocellulosic biomass to produce levulinic acid is difficult because of poor accessibility to cellulose and low hydrolytic yield. Thus a viable hydrolysis strategy and a suitable catalyst must be developed. RESULTS In this study, a bifunctional solid acid catalyst (HTC-SO 3 H) containing both cellulose binding sites ( Cl, COOH and OH) and catalytic sites ( SO 3 H) was prepared by a carbonization–grafting–oxidization method. X-ray photoelectron spectroscopy and Fourier transform infrared characterization confirmed the existence of Cl and the successful modification of the SO 3 H grafted hydrothermal carbon. The hydrogen bonds formed between cellulose and the binding sites ( Cl, OH and COOH) in the catalyst showed synergistic effects with the catalytic sites ( SO 3 H), leading to efficient hydrolysis of the furfural residue. A total of 74.81% (non-magnetic) and 70.18% (magnetic) levulinic acid yields were obtained after hydrolysis at 190 °C and 180 min in γ-valerolactone–H 2 O (1:1, v/v). Magnetic catalysts were synthesized using a co-precipitation method. Catalysts were recycled without any obvious reduction in catalytic activity. CONCLUSION Using sucralose as a raw material, the as-synthesized bifunctional solid acid catalyst improved the accessibility to cellulose and increased levulinic acid yield. Moreover, the grafted SO 3 H formed by hydroxyl hydration condensation exhibited superior stability. This study provides a valuable strategy for the efficient hydrolysis of lignocellulosic biomass. © 2022 Society of Chemical Industry (SCI).
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高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Zhengquan Yan,Lin Xing,Lin Zhao,Xinyi Zhang,Yingfan Zhang,Yulian Tang,Xuemei Zhou,Lei Hu,Nianlei Zhu
In this work, to efficiently eliminate the threat of toxic Cl − and Hg 2+ , a kind of AgRu bimetal mesoporous nanozyme co-stabilized by β-cyclodextrin and graphene oxide (AgRu@β-CD-co-GO) was first developed by a homogeneous redox and assembly method. The mesoporous microstructure and a large number of hydroxyl groups and GO aryl rings endowed AgRu@ β-CD-co-GO with superior peroxidase-mimic performance and enough active spots to adsorb more toxic Cl − and Hg 2+ . Under optimal conditions (pH 4.0, 350 μL 1.5 mM TMB and 200 μL 1.0 M H 2 O 2 and incubated for 30 min at 25 °C), AgRu@ β-CD-co-GO could accelerate the oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) into blue oxTMB in the presence of H 2 O 2 . Toxic Cl − or Hg 2+ would exclusively alter its peroxidase-like activity, accompanied with the characteristic UV–vis absorption intensity at 653 nm ( A 653 ) decreased and color changed from blue to colorless. AgRu@ β-CD-co-GO was successfully applied for visual detection of Cl − and Hg 2+ and enriched removal of them after their detection. The detection limits were low to be 3.2 × 10 −10 mol∙L −1 for Hg 2+ and 6.4 × 10 −8 mol/L for Cl − . After detection, more than 94.9% Hg 2+ and 93.8% Cl − could be removed by only a simple filtration. The mechanisms for peroxidase-mimic activity of AgRu@ β-CD-co-GO and its exclusive recognition of Hg 2+ and Cl − were proposed.
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高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Wenli Song,Bing Zhang,Wenli Zhou,Jilin Zhang,Liping Yu,Shixun Lian
All-inorganic perovskite quantum dots (PQDs, CsPbX3, X = Cl, Br, and I) show outstanding application prospects in the field of photoelectric devices. In recent years, the development of PQDs has greatly improved their stability to water, oxygen, and light. However, thermal quenching of PQDs greatly limits their practical application. Herein, we embed PQDs into ATiO3 (A = Ca, Ba, and Sr) of three different mesoporous spherical structures to explore the effect on thermal quenching of PQDs. Because of the unique mesoporous hollow microsphere structure and low thermal conductivity of SrTiO3, it can effectively block the heat transfer and improve the thermal quenching of PQDs. The photoluminescence (PL) intensity of CsPbBr3@SrTiO3 composites is 72.6% of the initial intensity after heating to 120 °C. Moreover, the PL intensity of CsPbBr3@SrTiO3 composites remains about 80% of the initial value even when stored in air for 20 days or irradiated by 365 nm UV light for 48 h. A neutral white light-emitting diode is assembled by a blue chip, CsPbBr3@SrTiO3 composites, and red phosphor of K2SiF6:Mn4+, which has a color temperature of 5389 K and a color gamut covered 133% of National Television Standards Committee (NTSC).
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PubMed
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Xiandong Wang,Yu Liu,Xinghui Zhang,Wenqing Tu,Qiyu Wang,Shuai Liu,Miao Zhang,Yongming Wu,Bixian Mai
As emerging alternatives to perfluorooctane sulfonate (PFOS), 6:2 chlorinated polyfluoroalkyl ether sulfonic acid (6:2 Cl-PFESA) and sodium p -perfluorous nonenox-benzenesulfonate (OBS) were frequently detected in the four freshwater fish species collected from Poyang Lake. Median concentrations of 6:2 Cl-PFESA and OBS in fish tissues were 0.046–6.0 and 0.46–5.1 ng/g wet weight, respectively. The highest concentrations of 6:2 Cl-PFESA was found in fish livers, whereas OBS was found in the pancreas, brain, gonads, and skin. The tissue distribution pattern of 6:2 Cl-PFESA is similar to that of PFOS. The tissue/liver ratios of OBS were higher than those of PFOS, suggesting that OBS has a greater tendency to transfer from the liver to other tissues. The logarithmic bioaccumulation factors (log BAFs) of 6:2 Cl-PFESA in three carnivorous fish species were greater than 3.7, whereas those of OBS were less than 3.7, indicating that 6:2 Cl-PFESA had a strong bioaccumulation potential. Notably, sex- and tissue-specific bioaccumulation of OBS has also been observed in catfish. Most tissues (except the gonads) exhibited higher OBS concentrations in males than in females. However, no differences were found for 6:2 Cl-PFESA and PFOS. Maternal transfer efficiency of OBS was higher than that of 6:2 Cl-PFESA and PFOS in catfish ( p < 0.05), indicating that OBS presents a higher risk of exposure to males and offspring through maternal offloading.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Dingliang Dai,Jianhao Qiu,Guanglu Xia,Yong Tang,Zhonghao Wu,Jianfeng Yao
Core-shell Bi-MOF@BiOX (X = I, Br and Cl) hybrids were fabricated by a one-pot solvothermal strategy via regulating the concentration and type of halogen ions in the Bi-based CAU-17 synthesis. By virtue of the competitive coordination effect to Bi 3+ between CAU-17 and BiOX, CAU-17 was converted into another Bi-MOF with similar structures and compositions. Moreover, Bi 3+ plays the role of “bridge” and endows an intimate interface contact between BiOX and the Bi-MOF, which immensely expedites the charge and mass transportation. The obtained Bi-MOF@BiOX hierarchical heterostructures were applied to photocatalytic elimination of solo and mixed pollutants (Cr(VI)/tetracycline and Cr(VI)/o-nitrophenol), and exhibited favorable performances. Choosing Bi-MOF@BiOI as a typical example, the corresponding performances for Cr(VI) reduction, tetracycline and o-nitrophenol degradation in their solo systems are 14, 10, 8 times higher than those of CAU-17, and 13, 7, 5 times higher than those of BiOI under visible light, respectively. Of note, the above photocatalytic performances could be further improved in the coexisting environment of Cr(VI) and tetracycline or o-nitrophenol, which is attributed to the elevated charge separation efficiency caused by the timely consumption of photo-excited electrons and holes. This work gives some insights into the delicate design of MOF photocatalysts and their applications in environmental restoration.
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高影响因子
危险品化学品经营许可证（带存储）