CATALYSIS TODAY
·
2022
·
IF 6.562
Yumeng Xia,Zehua Li,Ying Li,Kai Cai,Yunduo Liu,Jing Lv,Shouying Huang,Xinbin Ma
Dimethyl ether (DME) carbonylation is an important reaction for methyl acetate (MA) and ethanol production from syngas. Mordenite (MOR) has been used as an industrial catalyst due to the competitive catalytic properties, especially with extremely high selectivity of MA (>99%). Given the Brønsted acid sites (BAS) in 8-MR are proved the active centers, the properties of BAS are crucial factors that influence the reaction. Until now, most of the researches focus on increasing the number of BAS rather than tuning the acid strength. Here we modified H-MOR by Ga introduction using incipient wetness impregnation. Catalyst evaluation results suggest that Ga species can enhance DME conversion with a maintained MA selectivity. Combining with characterizations and DFT calculation, the textural and acidic properties along with the existing form of Ga species are determined. Further in-situ IR, theoretical and kinetics investigations demonstrated that the enhanced acid strength accelerates the reaction on Ga-modified MOR catalysts. This work inspires us that improving the acid strength is an efficient strategy for Brønsted acid-catalyzed reaction, such as DME carbonylation .
研究领域:
催化化学
·
理论计算化学
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JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Bang Lan,Renping Cao,Ting Chen,Lan Li,Ru Liu,Xuehua Yi,Shuijing Nie,Jing Wang
LaSrRO 4 :Mn 4+ (R = Al and Ga) are prepared by the high-temperature solid-phase method in air. Their luminescence properties, crystal structure, concentration dependent spectra, time-resolved spectra, fluorescence lifetime, and luminous mechanism are systematically researched, respectively. Mn 4+ ion is the luminescence center of LaSrRO 4 :Mn 4+ (R = Al and Ga). The excitation spectra of LaSrRO 4 :Mn 4+ (R = Al and Ga) under monitored at 715 nm lie in the range 210 – 650 nm with two main excitation peaks at ∼360 nm and 520 nm. With the excitation at 360 and 520 nm, LaSrRO 4 :Mn 4+ (R = Al and Ga) emit far-red light and have the emission spectra covering the region from 650 to 800 nm due to the 2 E g → 4 A 2g transition of Mn 4+ ions. The ideal Mn 4+ concentration in LaSrAlO 4 :Mn 4+ and LaSrGaO 4 :Mn 4+ are ∼ 0.4 mol% and 0.6 mol%, respectively. The spectral properties of samples verify the crystal field s via the Tanabe-Sugano energy level diagram of Mn 4+ ion. LaSrRO 4 :Mn 4+ (R = Al and Ga) have the emission spectra match with the absorption spectra of the plant photosensitive pigments red light and far-red light, which infers their promising application in plant growth light-emitting diode (LED) lamp
研究领域:
材料科学
·
光学
·
植物学
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jing Su,Yubin Kang,Yichen Zhu,Zhi Wen,Mingchun Li,Qiangqiang Zhu,Yue Zhai,Tengfei Wu,Le Wang
Owing to their environmental friendliness and excellent luminescent properties, lead-free copper-based halide perovskites have attracted significant attention for use in next-generation optoelectronic devices. In this work, Ga-doped Cs3Cu2I5 phosphors derived from CsCu2I3 were synthesized using a high-temperature solid-state method. Ga doping effectively modulated the crystal growth behavior and electronic structure, enabling high-performance emission tuning. The optimized material exhibited high-color-purity blue emission centered at ∼446 nm, with a CIE color purity as high as 97.7%. Owing to its exceptional optical properties, a blue LED device was fabricated, exhibiting stable and high-color-purity emission, thereby highlighting its practical potential for high-resolution display technologies and solid-state lighting applications. Furthermore, the material demonstrates remarkable water-induced color-switching behavior, enabling reversible color changes upon exposure to water. This characteristic renders it a promising candidate for applications in anticounterfeiting and information encryption. This study provides new insights and strategic directions for the development of copper-based perovskites aimed at achieving high-color-purity blue emission and multifunctional intelligent material applications.
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Functional Materials Letters
·
2025
·
IF 1.1
Jie Zhao,Ming Guan,Can Cui,Saifang Huang
To enhance the room-temperature lithium-ion conductivity and interfacial stability of Li 7 La 3 Zr 2 O 1 2 (LLZO) solid-state electrolytes, a co-doping strategy with Ga 3 + and Nb 5 + was employed. By systematically optimizing the sintering protocol — including heating rate, temperature, and dwell time — highly dense and phase-pure cubic-phase LLZO ceramics were successfully synthesized. The co-doping approach effectively stabilized the cubic garnet structure and regulated the lattice framework to facilitate Li + transport pathways. Under optimized conditions, compared to undoped LLZO (0.31 mS cm − 1 , 0.362 eV), the co-doped ceramic exhibited significantly enhanced total ionic conductivity (0.81 mS cm − 1 ) and reduced activation energy (0.207 eV), confirming the superior transport performance enabled by the co-doping strategy. Furthermore, the electrolyte showed good wettability and interfacial compatibility with metallic lithium, enabling stable cycling performance in symmetric Li∥Ga/Nb-LLZO∥Li cells over short durations. These results confirm the practical potential of the co-doped LLZO electrolyte in all-solid-state lithium batteries. This study provides a viable pathway for the material design and processing of high-performance LLZO-based solid electrolytes.
研究领域:
材料科学
·
固体离子学
·
储能技术
·
陶瓷工艺
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TRANSITION METAL CHEMISTRY
·
2025
·Vol. 51
·期 1
·6
·
IF 1.7
Ma Xueying,Yu Guomin,Li Yinghua,Li Hui,Wang Hongfang,Jia Xu,Cui Tiebing
To address the challenge of antibiotic residue remediation, this study employed a hydrothermal method to in-situ construct a bimetallic indium/gallium-based MIL-68 heterostructure on the surface of two-dimensional montmorillonite (MMT). By integrating metal node electronic structure regulation with interface engineering strategies, it provides a feasible approach to improve the low charge carrier separation efficiency in metal-organic framework (MOFs) materials. Experimental results demonstrate that when the MMT loading is 20%, the composite material exhibits obvious enhanced photocatalytic performance for the degradation of 40 mg/L tetracycline solution, with a degradation rate of up to 97% within 60 min using 10 mg of catalyst. This improvement is attributed to the synergistic effect of In/Ga bimetals and the interface charge transfer channels of the MMT 2D matrix, which together induce a Z-type charge carrier migration mechanism, enhancing the separation efficiency of photo-induced electron-hole pairs. After four cycles, the MIL-68(In/Ga)/MMT composite showed good cycling stability and demonstrated broad-spectrum degradation capability, achieving degradation rates of 99% and 79% for rhodamine B and methyl orange, respectively. This composite material shows good photocatalytic performance in dye degradation, providing new research insights for the field of photocatalytic degradation of pollutants.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Kang An,Siran Zhang,Hong Wang,Ningyan Li,Ziyang Zhang,Yuan Liu
Direct hydrogenation of CO 2 into ethanol has been considered as an up-and-coming way to achieve CO 2 utilization. Ethanol can be generated by reverse water gas shift as well as CO hydrogenation over Co-based catalysts, where the regulation of Co 0 − Co δ+ is critical. Herein, we designed a supported Co-based catalyst doped with gallium, which was derived from Co-Al-O spinel precursor to facilitate synergistic catalyzing for CO 2 -to-ethanol transformation. The selectivity of ethanol reached 20.1 % in a continuous flow fixed micro-reactor over reduced CoGa 1.0 Al 1.0 O 4 /SiO 2 catalyst at 270 °C and 3.0 MPa. Results of characterization show that the existence of the strong interaction between Ga oxide and cobalt induced the configuration of Co 0 − Co δ+ active pairs, which promotes the process of ethanol synthesis by coupling the dissociation (CH x *)/non-dissociation (CO*) of the intermediates. The strategy by tuning the interaction between cobalt and gallium and/or aluminum oxide brings an avenue to tailor Co 0 − Co δ+ active pairs for the hydrogenation of CO and CO 2 .
研究领域:
催化化学
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能源化学
·
材料化学
·
环境化学
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工业催化
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Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 23
·12429-12437
·
IF 14.511
Shuang Li,Yunxiang Hou,Di Li,Bo Zou,Qingtang Zhang,Yang Cao,Guodong Tang
SnSe is considered one of the most intriguing new thermoelectric materials. Polycrystalline SnSe offers a wide range of thermoelectric applications due to its facile synthetic processing and machinability. Herein, we have achieved a high average ZT of 0.8 as well as a high peak ZT of 1.86 in solution-synthesized porous Zn and Ga codoped SnSe nanosheets, generating a maximum energy conversion efficiency of 13.3%. High-density micro/nanopores are induced in the SnSe matrix, which are more effective for scattering phonons and reducing the thermal conductivity. The high density of micro/nanopores, nanosheet structure and dislocations contribute to an ultralow lattice thermal conductivity (0.157 W m−1 K−1 at 873 K). Meanwhile, Ga incorporation can induce band convergence and create resonance levels, producing a large Seebeck coefficient. Ga and Zn codoping contributes to a sharp increase in carrier concentration and an obviously increased electrical conductivity. The enhanced Seebeck coefficient and increased carrier concentration help in achieving a significant enhancement of the power factor over a wide temperature range in the porous Zn and Ga codoped SnSe nanosheets. Consequently, high thermoelectric performance is realized over a wide temperature range via the decoupling of electron–phonon transport in SnSe. This work opens up a great opportunity for designing prospective materials for thermoelectric applications with the aid of the solution synthesis route.
研究领域:
材料科学
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凝聚态物理
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纳米科技
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能源材料
·
半导体物理
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热电转换
·
无机功能材料
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ORGANIC ELECTRONICS
·
2019
·
IF 3.495
Zhu Ma,Weiya Zhou,Zheng Xiao,Hua Zhang,Zhuoyun Li,Jia Zhuang,Changtao Peng,Yuelong Huang
Planar perovskite solar cells (PSCs) have been demonstrated as a promising architecture for efficient, large-scale, flexible and tandem solar cell. To date, unfortunately, most planar PSCs suffer from current-voltage hysteresis, which derives from interface mismatch, surface defects , ion migration, and ferroelectric property et al. Here, we demonstrate a facile strategy to significantly reduce the hysteresis and improve the performance of planar PSCs by doping gallium (Ga) into tin oxide (SnO 2 ) nanocrystal electron-transport layer using low-temperature solution‐processed method. It is revealed that the Ga-doped SnO 2 ETL owning better band alignment with the perovskite absorption layer , which is helpful for electron extraction. It is found that gallium doping severely decreases the trap state density in SnO 2 , leading to a lower recombination rate and negligible hysteresis. With the optimized doping concentration of Ga ions , the champion device achieves a highest PCE of 18.18% and the hysteresis index is reduced from 23.9% to 1.7%.
研究领域:
光伏技术
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材料科学
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纳米技术
·
可再生能源
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高影响因子
JOURNAL OF POROUS MATERIALS
·
2026
·
IF 3.2
Liu Jihua,Hua Ge,Zhang Chao,Wang Yifei,Ma Hong,Wu Jianbing,Wu Zhiwei
Controlled defect construction in zeolites provides an effective approach to modulating metal dispersion and stability. In this work, a series of Zn-loaded Ga-silicalite (GS-1) catalysts were prepared via nitric acid leaching to investigate how Ga extraction–induced silanol nests influence Zn dispersion and catalytic behavior in propane dehydrogenation (PDH). The selective removal of Ga generated increased populations of silanol nests while largely preserving the MFI framework, which was accompanied by improved dispersion and structural stabilization of Zn species, likely through Zn–O–Si interactions. Catalytic evaluation at 550 °C and 0.1 MPa revealed that the acid-treated catalysts exhibited suppressed deactivation behavior under PDH conditions. Among the catalysts studied, 5%Zn/0.6GS-1–12 N catalyst achieved the most balanced performance, with a deactivation constant reduced from 0.0546 to 0.0201 h − 1 . These results highlight the role of Ga extraction–induced defects in regulating metal–support interactions and mitigating catalyst deactivation in PDH.
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ANALYTICAL CHEMISTRY
·
2026
·Vol. 98
·期 31
·23301-23313
·
IF 7.3
Liang Shuang,Chen Dongyao,Ma Liming,Feng Xinyi,Gu Dongxue,Yu Kedi,Chen Zhengbo
The
issue of tetracycline (TC) residues in the environment poses
a serious threat to ecosystems and public health, therefore, there
is an urgent need to develop efficient and convenient detection methods.
This study successfully prepared Ga/Zn NC single-atom (SA) nanozymes
with peroxidase-like catalytic activity. Based on the differential
inhibitory effects of different TCs on the Ga/Zn NC SA nanozymes’
catalytic activity, a three-channel colorimetric sensor array is constructed
by regulating the temperature, resulting in differentiated colorimetric
response signals for TCs. Combined with linear discriminant analysis,
the sensor array successfully achieved qualitative differentiation
and quantitative analysis of seven TCs within the range of 1 nM to
100 μM. Further combining the sensor array with machine learning
algorithms such as random forests, accurate identification and prediction
of TCs in blind samples and various actual environmental samples have
been achieved. The sensor array provides a new method for efficient
differentiation and detection of TCs in complex samples, and has good
application prospects in environmental monitoring and food safety
fields.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Siqi Zhang,Xiao Li,Yinhui Yi,Zixiang Liao,Yue Ren,Kunqi Fan,Zhiyuan Wang,Pengpeng Yu,Libo Li,Tianyan You
Pt NPs was loaded to enhance the laccase-like activity of Cu-based nanozyme. • Design of a three-channel colorimetric sensing array based on the nanozyme. • The array enabled the simultaneous identification and detection of multiple phenol. • The developed sensor array showed superior analytical ability for phenol detection. Phenolic compounds represent a class of hazardous environmental pollutants characterized by high toxicity, low biodegradability, and a strong tendency to bioaccumulate, leading to considerable risks for ecological safety and human health. In this work, a novel bimetallic nanozyme Pt@GA-Cu was synthesized by loading platinum nanoparticles (Pt NPs) onto a copper-based laccase-like material. The synergistic interaction between Pt and Cu significantly enhanced the electron transfer rate and catalytic efficiency, resulting in better laccase-like performance than that of the individual materials. By this enhanced performance, a time-dependent three-channel colorimetric sensor array was constructed. With the integration of machine learning (ML), specifically linear discriminant analysis (LDA) and hierarchical cluster analysis (HCA), the as-developed sensor successfully not only distinguished four distinct phenolic compounds (2,4-DP, 4-cP, CAT, and 2,6-DMP) with high accuracy, but also exhibited exceptional discriminative capabilities even when deployed within intricate multi-component phenolic solutions. Furthermore, to evaluate the functionality of the sensor in practical condition, real water samples were tested using standard addition methods, and satisfactory recovery rates (93.15–112.5%) and low relative standard deviations (<2.2%) were obtained. This study provides an efficient and reliable strategy to rapidly detect and differentiate among various phenolic pollutants, offering considerable potential for environmental monitoring applications. A Pt-loaded Cu nanozyme-based time-dependent colorimetric array with machine learning simultaneously discriminates and detects four phenolic pollutants. Download: Download high-res image (179KB) Download: Download full-size image
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Materials
·
2026
·Vol. 19
·期 9
·1685
·
IF 3.7
Runze Zhou,Xinqiang Yuan,Longfei Zhang,Chi Zhang,Hongxing Dong,Long Zhang
Highlights Data-driven framework for fluoride-glass prediction and inverse design. The genetic-algorithm–optimized backpropagation neural network jointly predicts refractive index and density. Bayesian hyperparameter tuning enhances accuracy and robustness. Constraint-aware inverse design ranks feasible compositions by targets & similarity. SHapley Additive exPlanations analysis is employed to quantify feature importance and enhance the interpretability of the model. With the increasing application of novel glass materials in the field of optics, traditional empirical and trial-and-error approaches to glass development are gradually becoming insufficient to meet escalating performance demands. In this study, we propose a neural network-based machine learning method for the design of advanced fluoride glass materials. Predictive models for density and refractive index were first developed based on online fluoride glass datasets. Moreover, SHapley Additive exPlanations (SHAP) analysis was adopted to uncover the quantitative composition-property relationship. Then, the well-trained model was employed for inverse design, identifying specific compositions that fulfill desired properties in terms of density and refractive index. Finally, several recommended compositions were experimentally validated and the measured density and refractive index matched well with the corresponding input values, thereby confirming the effectiveness of the proposed method in designing new fluoride glass materials.
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