FUEL
·
2024
·
IF 6.7
Juzhi Leng,Xinru Yang,Qi Zeng,Wenting Chen,Shupeng Guo,Min Zhong,Lili Liu,Yunlei Chen,Pengju Yang,Mingqi Li
Photochemical reduction of CO 2 (CO 2 RR) to syngas is an attractive approach for carbon–neutral recycling. Manipulating binding strength to reactive species on catalyst surfaces is challenging but essential for achieving efficient syngas production with a desired CO/H 2 ratio. Here, we demonstrate that the binding strength to key reaction intermediates (*CO 2 , *H and *CO) on the Co 3 O 4 surface can be fine-tuned by incorporating varying amount of Zn atoms. Dedicated experiments and theoretical simulations unveil that Zn doping allows for simultaneous control of both CO 2 adsorption/activation and the adsorption affinity of *CO on Zn-Co 3 O 4 catalysts, resulting in a significant enhancement in CO 2 to CO conversion. Moreover, Zn doping can alter the hydrophilicity of the catalyst surface, affecting the water adsorption behavior and adjusting the hydrogen evolution reaction (HER) activity. As a result, the CO/H 2 ratio can be readily tuned via varying the Zn doping level. This study presents an effective and economical method approach to manipulate the electronic structure of catalyst surfaces for controlling the kinetics of CO 2 RR and HER reactions, providing valuable insight into the design of highly active transition metal oxides (TMOs) based photocatalysts for syngas production with a tailored CO/H 2 ratio.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Minghao Zhou,Shijiao Zhang,Yanlai Wang
By employing semiconductor composite strategies and morphology control, Zn-doped CuInS 2 quantum dots with a ZnS shell structure (ZCIS@ZnS QDs) have been synthesized and combined with TiO 2 nanowires or nanoparticles (NWs/NPs) for photodetector applications. In the composite material, the QDs are uniformly attached to the surface of TiO 2 NWs/NPs. The photodetector constructed with ZCIS@ZnS QDs and TiO 2 NWs/NPs (ZCIS@ZnS@TiO 2 NWs/NPs) demonstrated superior photodetection performance. It exhibited excellent responsivity (∼6.2 mA/W) and detectivity (∼1.6 × 10 12 Jones) under ultraviolet (UV) illumination (∼365 nm). This non-toxic and environmentally friendly composite material provides a promising alternative for applications in various fields.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qi-Hua Yang,Gui-Hua Li,Yu-Chen Ao,Shu-Juan Zhao,Han-Qi Wei,Le Fu,Zhi-Wei Luo,Tian-Liang Zhou,Chu-Jie Wang,Ge-Mei Cai
As a new generation of environmentally friendly halide materials, Cs 3 Cu 2 I 5 shows up the promising application in scintillation, LED, and photoelectric detection fields. However, liquid phase methods cannot produce Cs 3 Cu 2 I 5 on a large scale, and the preparation process is accompanied by serious pollution. Although the ball milling method can solve the problems caused by the liquid phase synthesis method, the Cs 3 Cu 2 I 5 obtained has many surface defects and low luminescence efficiency. In this work, a strategy of doping-assisted ball-milling synthesis using ZnI 2 is proposed. Similar to the chemical preparation of Cs 3 Cu 2 I 5 , the iodine-rich environment during the modified ball milling process can also play a role in repairing surface defects. And it has been demonstrated through experiments and first principles calculations that the distortion of [Cu 2 I 5 ] 3- under ground/excited state can be adjusted through doping Zn into the Cu1 site, the formation barrier of self-trapped excitons is reduced, and the luminous efficiency of Cs 3 Cu 2 I 5 is significantly improved. Subsequently, using the simple hot-pressing method, the representative Cs 3 Cu 2 I 5 :1.0Zn sample was combined with commercially available polypropylene to fabricate Cs 3 Cu 2 I 5 :1.0Zn@PP film. Finally, the potential applications of the newly-developed film in portable and customizable WLED and scintillation fields were explored.
研究领域:
材料科学
·
光学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2023
·Vol. 129
·期 4
·1-10
·
IF 2.7
Luo Junsong,Guo Yiming,Liu Lian,Yu Zhou,Zhao Yong,Huang Mei,Xu Min,Duan Xuru,Zhang Yong
Nb 3 (Al 1– x Zn x ) ( x = 0–0.05) wires were obtained after single rapid heating, quenching and low temperature transformation (single-RHQT) process. It is found that Zn element can make crystal plane diffraction peaks of Nb 3 Al phase shift to higher angle, and the interplanar crystal spacing decreases gradually, which indicates that Al atoms in Nb 3 Al lattice are replaced by Zn atoms with smaller diameters. And the addition of Zn can reduce Δ T c and make the superconducting phases purer, and magnetic performances such as critical temperature ( T c ), critical current density ( J c ), irreversible field ( B irr ) are better than that of the pure sample. Nb 3 (Al 0.99 Zn 0.01 ) wire shows the highest J c value of about 5.9 × 10 4 A/cm 2 at 4.2 K and 8 T, and the highest T c value of 16.8 K was found in Nb 3 (Al 0.98 Zn 0.02 ). The influence of multiple rapid heating, quenching and low temperature transformation (multi-RHQT) process on Nb 3 (Al 1– x Zn x ) wires was mainly explored, and 2 at% and 3 at% Zn samples were selected with relatively high Δ T c values for five times RHQT treatment. It is observed that the multi-RHQT process can further reduce Δ T c , and more homogeneous superconducting phases are discovered compared with that of single-RHQT process. The elements are also evenly distributed in the multi-RHQT-processed Nb 3 (Al 1– x Zn x ) wires, leading to the improvement of J c , B irr performances compared to single-RHQT samples. Multi-RHQT-processed Nb 3 (Al 0.98 Zn 0.02 ) and Nb 3 (Al 0.97 Zn 0.03 ) samples show the J c values of 1.7 × 10 5 A/cm 2 and 1.2 × 10 5 A/cm 2 (4.2 K, 8 T), which are nearly ten times as many as that of single-RHQT samples, and Nb 3 (Al 0.97 Zn 0.03 ) has the highest B irr values of 19.6 T (4.2 K) and 10.7 T (10 K). Flux pinning of the Nb 3 (Al 1– x Zn x ) ( x = 0.01–0.05) wires follows the surface pinning mechanism, where grain boundary and stacking faults are considered as pinning centers.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
C.H. Yang,H.L. Pan,Y.K. Yang,H.T. Wu
A series of Zn-doped Li 2 (Mg 1-x Zn x ) 3 TiO 6 (x = 0, 0.05, 0.10, 0.15, 0.2) ceramics were formed via the conventional solid-state process. Influence of Zn 2+ on the crystal structures, phase compositions, sintering characteristics and properties of Li 2 (Mg 1-x Zn x ) 3 TiO 6 (0 ≤ x ≤ 0.2) ceramics were systematically studied. XRD results showed that a single phase with the cubic rock-salt structure was formed for Li 2 (Mg 1-x Zn x ) 3 TiO 6 (0 ≤ x ≤ 0.15) and the second phase of Zn 2 TiO 4 could be detected with a further increase of the Zn 2+ contents. Some intrinsic parameters were calculated in order to investigate the correlations between these parameters of Mg/Zn O bonds and microwave dielectric properties . As the Zn 2+ content increases, optimum ε r values exhibited an increasing trend, which could be explained by the variations of the polarizability and bond ionicity of Mg/Zn O bonds. The decrease of maximum Q·f values for Li 2 (Mg 1-x Zn x ) 3 TiO 6 (x = 0, 0.05, 0.10, 0.15, 0.2) ceramics could be predicted by the decrease of the packing fraction and lattice energy of Mg/Zn O bonds. τ ƒ values showed close relationship with the bond energy and thermal expansion coefficient of Mg/Zn O bonds. Excellent combined microwave dielectric properties with ε r = 15.46 (at 10.9 GHz), Q·f = 125,453 GHz (at 8.6 GHz) and τ f = −32.35 ppm/°C were obtained for Li 2 (Mg 0.85 Zn 0.15 ) 3 TiO 6 ceramic sintered at 1600 °C.
研究领域:
材料科学
·
电子材料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 62
·35353-35359
·
IF 2.936
Yanyan Zheng,Chengyan Liu,Lei Miao,Hong Lin,Jie Gao,Xiaoyang Wang,Junliang Chen,Shaohai Wu,Xin Li,Huanfu Cai
As promising candidates for the progress of low-temperature thermoelectric devices, MgAgSb-based thermoelectric materials have drawn a great deal of attention. However, due to complicated phase changes, high content of impurities and high volatilization of Mg, it is difficult to synthesize pure phase MgAgSb-based thermoelectric materials via conventional methods. Here, MgAgSb alloy was successfully synthesized by a combination of common planetary ball milling and spark plasma sintering. Furthermore, the introduction of Zn improved the purity of alloys, leading to optimization of the electrical transport properties. As a result, the power factor was improved from 1087 μW m−1 K−2 for MgAg0.9Sb0.95 to 1394 μW m−1 K−2 for Mg0.97Zn0.03Ag0.9Sb0.95 at 473 K, and the ZT reached ∼0.7 at 473 K. These results suggest that MgAgSb-based thermoelectric materials have a good thermoelectric application potential and this study can be used as guidance for the synthesis and performance improvement of other thermoelectric materials. Our synthesis route sets forth a new avenue for accelerating commercial applications of MgAgSb-based thermoelectric power generation or refrigeration.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Dexu Zhang,Xiaoying Peng,Jie Zhang,Shixuan Zhu,Zhihong Xue,Shubin Xiong,Shuai Xiong,Bo Sheng,Yiqiang He,Guiming Peng,Jiadong Zhang
Graphitic carbon nitride (g-C 3 N 4 ) has become a favored universal photocatalyst. Despite its numerous advantages, the photocatalytic efficiency of g-C 3 N 4 is hindered by the substantial recombination of photoexcited charge carriers and holes. In this work, we demonstrate that Zn-doped tubular carbon nitride photocatalyst (Zn-tCN) can serve as highly efficient catalysts for H 2 O 2 photosynthesis. Mechanism studies confirm that the presence of Zn in g-C 3 N 4 prolongs the lifetimes of photogenerated carriers and inhibits their recombination, which triggers the reduction of O 2 to reaction intermediates ( O 2 − ), as supported by in situ electron paramagnetic resonance (EPR) spectroscopy. More importantly, sacrificial agent experiments coupled with in situ EPR results confirmed that the reaction mechanism involves a concerted two-electron transfer process. The optimal catalyst displays a H 2 O 2 productivity of 162.4μmol g –1 h −1 under visible-light irradiation without a sacrificial agent, which is 11.7 times higher than that of pristine g-C 3 N 4 (13.8μmol g –1 h −1 ). This work proposes a synthetic strategy for the preparation of high-performance Zn-doped g-C 3 N 4 , which offers insights and perspectives for developing highly active photocatalysts and deepening the understanding of photocatalytic mechanisms.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Lin Li,Daocheng Hong,Bohao Liu,Tianci Su,XiuLi Yang,Lu Yue,Wenhui Zhang
Porous zinc doped indium oxide (Zn-In 2 O 3 ) nanobelts were synthesized using a straightforward hydrothermal method. The effects of different metal doping (Zn, Sn, Sm, Yb, Cu) and various concentrations of Zn on the morphology and gas-sensing properties of In 2 O 3 were investigated. The gas sensing evaluations reveal that among all tested sensors, the porous 7.5% Zn-In 2 O 3 nanobelt sensor exhibits the highest response, reaching 127 (S= R a / R g ) to 50 ppm acetone at a low operating temperature of 140°C, which is approximately 21 times greater than that of pure In 2 O 3 . Additionally, this sensor demonstrates rapid response/recovery time, a low detection limit of 40 ppb, good selectivity, excellent repeatability, and long-term stability toward acetone. In-situ diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy and density functional theory (DFT) calculations are employed to elucidate the mechanisms behind the enhanced gas-sensing performance of the porous Zn-In 2 O 3 nanobelts. The superior gas-sensing characteristics are attributed to the distinctive porous nanobelt architecture, abundant oxygen vacancies, large specific surface area, and the effects of Zn doping.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Kun Li,Xiao Chang,Xurong Qiao,Shifan Yu,Xiaofang Li,Fujun Xia,Qingzhong Xue
Metal-organic frameworks (MOFs) derived metal oxides, as a promising gas-sensing material, have received extensive attention because of its unique advantages of abundant pore structures, high surface areas and diverse compositions. In this work, hierarchical flower-like Zn-doped Co 3 O 4 derived from Zn/Co-MOF is prepared through a process of solvothermal synthesis and annealing. 3 mol% Zn-doped Co 3 O 4 exhibits the highest response of 52.3 toward 100 ppm acetone at 200 °C, which is nearly 20 times higher than that of pure Co 3 O 4 . Additionally, 3 mol% Zn-doped Co 3 O 4 based sensor displays a ppb-level detection limit for acetone, outstanding selectivity, excellent long-term stability and good independence to humidity. The probable reasons for the improved sensing properties are attributed to the changes of carrier concentration, specific surface area and chemisorbed oxygen amount due to Zn doping.
研究领域:
材料科学
·
化学传感器
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Xuan Jiang,Zhaodong Nan
Multiple oxidation states of first-row transition-metal cations were always doped in g-C3N4 to enhance the catalytic activity by the synergistic action between the cations in the Fenton-like reaction. It remains a challenge for the synergistic mechanism when the stable electronic centrifugation (3d10) of Zn2+ was used. In this work, Zn2+ was facilely introduced in Fe-doped g-C3N4 (named xFe/yZn-CN). Compared with Fe-CN, the rate constant of the tetracycline hydrochloride (TC) degradation increased from 0.0505 to 0.0662 min–1 for 4Fe/1Zn-CN. The catalytic performance was more outstanding than those of similar catalysts reported. The catalytic mechanism was proposed. With the introduction of Zn2+ in 4Fe/1Zn-CN, the atomic percent of Fe (Fe2+ and Fe3+) and the molar ratio of Fe2+ to Fe3+ at the catalyst’s surface increased, where Fe2+ and Fe3+ were the active sites for adsorption and degradation. In addition, the band gap of 4Fe/1Zn-CN decreased, leading to enhanced electron transfer and conversion from Fe3+ to Fe2+. These changes resulted in the excellent catalytic performance of 4Fe/1Zn-CN. Radicals •OH, •O2–, and 1O2 formed in the reaction and took different actions under various pH values. 4Fe/1Zn-CN exhibited excellent stability after five cycles under the same conditions. These results may give a strategy for synthesizing Fenton-like catalysts.
研究领域:
材料科学
·
环境催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Yi Lu,Ahmed Mahmoud Idris,Ping Lu,Xinyan Jiang,Jin Wang,Hao Zheng,Xiandan Liang,Sheng Li,Zhengquan Li
Photocatalytic selective oxidation represents a sustainable approach for valuable chemical transformations, yet achieving high yield and selectivity of products remains a significant challenge. In this work, we demonstrate that electronic structure modulation of CsCuCl 3 halide perovskites enables highly selective photocatalytic oxidation of toluene to benzaldehyde (BD). By strategically doping Zn into CsCuCl 3 , we achieved control over the electronic modulation of catalytic sites, leading to a remarkable BD yield of 4.08 mmol g −1 h −1 with 85.4 % selectivity under visible light irradiation. Mechanistic investigations revealed that Zn doping creates an optimal electronic structure, which simultaneously facilitates O 2 activation to form superoxide radicals and promotes selective C–H bond activation of toluene. Density functional theory calculations showed that Zn doping induces charge redistribution at Cu and Cl sites, optimizing surface energetics for both O 2 and toluene adsorption while lowering kinetic barriers for the rate-determining steps. The enhanced charge carrier separation efficiency, confirmed by spectroscopic and electrochemical analyses, further contributes to the superior catalytic performance. This work establishes electronic structure engineering as a powerful strategy for developing high-performance single-component photocatalysts and provides new insights into the selective photocatalytic oxidation reactions.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 27
·10218-10225
·
IF 5.7
Tingfeng Ma,Bin Li,Yongkang Zhu,Senwei Wu,Xiujian Zhao,Xinhong Chu,Shouqin Tian
Tungsten oxides have attracted much attention and research in the field of photochromic smart windows, but their application is limited by their slow light response and poor reversibility. In order to overcome the limitations, Zn2+-doped W18O49 nanoparticles were prepared using a facile hydrothermal method and they exhibited good photochromic performance with a quick coloring rate under UV irradiation because more oxygen vacancies in the crystal lattice caused by Zn doping could facilitate the reduction of W6+ to W5+, which was confirmed from XRD and XPS results. In addition, the Zn-doped W18O49 nanoparticle-based films showed excellent photochromic properties with a high visible transmittance (Tlum) of 85.33%, a large solar modulation efficiency (ΔTsol) of 47.18% and a fast photochromic speed (3 min) as well as good cycling stability. These properties are better than those reported in most previous works. Therefore, this work can provide a promising photochromic material with high performance for smart windows.
研究领域:
材料科学
·
纳米技术
✓ 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）