CRYSTAL GROWTH & DESIGN
·
2020
·
IF 4.089
Jindong Chen,Chensheng Lin,Shunda Yang,Xiaotian Jiang,Shuangshuang Shi,Yingshuang Sun,Bingxuan Li,Shenghao Fang,Ning Ye
Two ternary infrared nonlinear optical materials Cd4SiS6 (1) and Cd4SiSe6 (2) with polar space group Cc were obtained by mixing d10 configurations-central tetrahedra motifs and nonlinear optical (NLO)-active distorted MIVQ4 tetrahedra motifs in a non-alkaline earth metals-containing system. They exhibited an interesting three-dimensional (3D) framework structure, and millimeter-level single crystals were successfully grown by a chemical transport reaction. Comprehensive optical measurements indicated that they achieve coexistence of good second-harmonic generation (SHG) responses (1.3 and 1.9 × AgGaS2 at 74–106 μm particle size) and high laser-induced damage thresholds (8.6 and 7.1 × AgGaS2 at 1064 nm laser) and wide infrared (IR) transparent regions (0.45–17.6 μm for 1, 0.64–20.3 μm for 2). Furthermore, theoretical studies revealed that their SHG effects originate from two functional building motifs (FBMs) CdQ4 and SiQ4 tetrahedra, shedding light on the exploration of new IR NLO materials with mixed FBMs.
研究领域:
材料科学
·
非线性光学
·
红外光子学
·
晶体化学
·
固态化学
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高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 31
·10660-10672
·
IF 6.4
Yonggang Zhao,Congyan Xu,Zhineng Zhou,Yufei Chen,Ying Zhang,Lang Wu,Xu Su,Xinghuan Hu,Shurong Wang
High-temperature sulfoselenization is essential in producing Cu2ZnSn (S,Se)4 (CZTSSe) thin-film solar cells. At high temperature, the Cu2ZnSn(S,Se)4 phase-transition speed is fast, which causes grain transition to mature quickly, followed by grain decomposition. Although grain surfaces are relatively flat at low temperatures, the small grain and more grain boundaries lead to low efficiency. In this study, a dynamic-temperature sulfoselenization process was adopted to utilize both the advantages of high and low temperatures comprehensively. Different constant- and variable-temperature sulfoselenization processes were developed for annealing Cu–Zn–Sn–S precursor films prepared in the air using dimethyl sulfoxide (DMSO) and 2-methoxyethanol (MOE) dual solvent systems. As a result, CZTSSe films with a flat, holeless, and dense surface, and a single-layer large grain penetrating the whole cross-section were fabricated by a proper variable-temperature sulfoselenization process. Finally, 11.11% total-area power conversion efficiency (12.22% active area efficiency) of CZTSSe solar cells (without antireflection coating) based on the variable-temperature sulfoselenization process was achieved successfully. Compared with the highest efficiency of 9.10% of CZTSSe film solar cells fabricated from the stable-temperature sulfoselenization annealing process, the efficiency was improved by 22%. The variable-temperature annealing processes in this study can also be applied to the preparation of other multi-element thin-film semiconductor materials.
研究领域:
材料科学
·
光伏技术
·
半导体薄膜
·
可再生能源
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DOI
高影响因子
CRYSTENGCOMM
·
2018
·Vol. 20
·期 9
·1220-1231
·
IF 3.304
Jianhua Zhang,Qingshan Fu,Yongqiang Xue,Zixiang Cui
Trigonal selenium (t-Se) nanomaterials with different morphologies present distinct properties and great potential applications in electric devices. However, controlled synthesis of t-Se nanomaterials with various morphologies is difficult in a typical preparation process. Therefore, it is imperative to develop an easily controlled and high-efficiency method to prepare t-Se with various morphologies. Herein, a precursor conversion method was proposed to prepare t-Se nanomaterials with different morphologies. That is, uniform amorphous selenium (a-Se) nanospheres were prepared by reducing sodium selenite with glucose, and then t-Se nanomaterials with morphologies of spheres, tubes, rods, belts and wires were obtained by different subsequent treatments for the conversion of a-Se into t-Se. The results demonstrate that the t-Se nanospheres were obtained by hydrothermal treatment at 150 °C, t-Se nanorods and nanotubes by ultrasonication of a-Se in water and with the addition of PVP K30 for nanotubes, t-Se nanowires by the aging of a-Se in ethanol and in a dark environment, and t-Se nanobelts by increasing the concentration of a-Se in ethanol. The conversion processes from a-Se nanospheres into t-Se 1D nanostructures comply with a “solid–solution–solid” formation mechanism, while the conversion from a-Se nanospheres into t-Se nanospheres complies with the mechanism of crystalline phase transformation. The method provides us a mild and easily controlled route for the preparation of t-Se nanomaterials with desired morphologies.
研究领域:
纳米科学
·
材料化学
·
晶体生长
·
功能材料
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Wenqing Wang,Fan Wu,Hao Li,Jianming Pan
A photocatalytic self-propelled nanomotor adsorbent was developed for Pd(II) recovery. • Self-propulsion overcomes diffusion-limited adsorption kinetics. • EPR reveals the ROS-mediated mechanism of long-term propulsion. • Selective Pd(II) recovery is achieved in complex acidic wastewater. The recovery of palladium (Pd) from complex acidic industrial wastewater is severely restricted by sluggish interfacial mass transfer and inherent diffusion-limited adsorption kinetics. To address this long-standing bottleneck, asymmetric N/Se-codoped resorcinol-formaldehyde nanomotors (Se-RF@NMs) were rationally fabricated via an emulsion-confined anisotropic growth strategy for photocatalytic self-propulsion-boosted Pd(II) recovey. Under light irradiation, the photoresponsive resin framework enables continuous in-situ H 2 O 2 generation. Meanwhile, the adsorption-induced in-situ reduction of Pd(II) further accelerates catalytic H 2 O 2 decomposition to generate oxygen microbubbles, endowing nanomotors with sustainable autonomous motion and dynamically promoting interfacial ion transport. EPR characterization confirms that photogenerated holes and reactive oxygen species sustain the cyclic H 2 O 2 generation-decomposition system, effectively stabilizing the self-propulsion behavior of Se-RF@NMs. Benefiting from the synergistic coupling of photocatalytic self-propulsion and N/Se-based selective coordination adsorption, the optimized Se-RF@NMs achieve a superior Pd(II) adsorption capacity of 196.75 mg g −1 , as well as excellent selectivity in multi-metal competitive systems and practical industrial wastewater matrices. This work elucidates a photocatalysis-driven active mass transfer enhancement mechanism, establishing a feasible paradigm to break the intrinsic diffusion limitation of conventional adsorption. It provides new insights into the rational design of intelligent self-propelled catalytic adsorbents for high-efficiency precious metal recovery in complex and harsh water environments. Download: Download high-res image (152KB) Download: Download full-size image
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高影响因子
PeerJ
·
2026
·
IF 2.9
Huiqing Ma,Lijia Sun,Huaibo Yuan,Wenhong Liu
The synthesis of Selenium nanoparticles (Se NPs) using plant extracts has been widely recognized for many advantages. In this study, Epigallocatechin gallate (EGCG) was used as the reducing agent for sodium selenite to obtain Epigallocatechin gallate-Selenium nanoparticles (EGCG-Se NPs) whose hypoglycemic potential was evaluated. The Ultraviolet-visible(UV-Vis) spectra, Fourier Transform Infrared Spectroscopy (FTIR) profiles, and X-ray Photoelectron Spectroscopy (XPS) analysis of EGCG-Se NPs all confirmed the Se-O coordination bonds between Se NPs and EGCG, which is conducive to improving the stability of the molecular structure of the complex. The ellipsoidal structure (20–90 nm) and amorphous state of EGCG-Se NPs were characterized via X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). Dynamic light scattering (DLS) and zeta potential analyses confirm that EGCG-SeNPs exhibit sustained colloidal stability under physiologically relevant buffer conditions (pH 7.2–7.4). The EGCG-Se NPs have a significant dose-responsive inhibitory effect on α-amylase (6.1–15.9%) and α-glucosidase (2.8–5.7%). In vitro studies have demonstrated the potential of this complex for both the supplementation of selenium and blood glucose regulation, warranting further in vivo validation.
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2026
·Vol. 65
·期 34
·19902-19910
·
IF 4.6
Feng Xinlian,Zhu Ting,Wu YuChi,Ji Shumin,Ji Yadong,Yu Zhongwei,Zhang Nan,Yin Shuhu,Xu Jun
Developing efficient and durable electrocatalysts toward
the acidic
oxygen evolution reaction is crucial for the advancement of renewable
hydrogen energy technologies. Ruthenium dioxide stands out as one
of the most promising acidic OER catalysts. However, the unsatisfactory
stability of RuO 2 and the sluggish proton-coupled electron
transfer kinetics of OER hinder its practical application. Herein,
we introduce Se doping to form a Se–Ru–O asymmetric
configuration into RuO 2 to tailor electron redistribution
and achieve both high activity and stability. The obtained Se-RuO 2 shows superior electrocatalytic activity with a small overpotential
of 212 mV at 10 mA cm –2 and a long durability of
230 h. Electrochemical tests and density functional theory calculations
demonstrate that Se-RuO 2 exhibits enhanced deprotonation
kinetics and optimized adsorption energy of reaction intermediates,
thereby boosting OER activity. Morever, the electronic interactions
mediated by the asymmetric Se–Ru–O bond diminish the
covalency of Ru–O bonds and thus boost the stability of RuO 2 . This work offers a facile strategy for the development of
high-performance catalysts incorporated with nonmetallic elements.
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Lianchen Zhang,Runlong Zhai,Yaru Cheng,Feng Teng,Peng Hu,Haibo Fan,Jiaming Song,Yang Jiao
Improving the zero-bias photocurrent density of the photoelectrochemical (PEC) photodetector boosts its responsivity and aids in developing portable, low-energy-consumption devices. Constructing a high-quality heterojunction facilitates the separation and transport of photogenerated carriers, playing a crucial role in enhancing photocurrent density. In this work, a three-dimensional (3D) heterojunction of t-Se-coated SnS2 nanoflower arrays was successfully constructed via a simple hydrothermal approach followed by electrochemical deposition. When serving as a photoelectrode for the PEC photodetector, it significantly boosts the photocurrent density and the responsivity. Under white light illumination (258.0 mW/cm2), the photocurrent density achieves 1 mA/cm2, which is 13.3 times and 200 times that achieved when individual t-Se films and SnS2 nanosheet arrays were employed, respectively. At the optimal response wavelengths (400 nm for SnS2 and 600 nm for t-Se), the responsivity is enhanced by factors of 6.3 and 65.7. A broadband (400∼900 nm) and rapid photoresponse is demonstrated, with the response time less than 40 ms. Type II energy band alignment between SnS2 and t-Se, along with the unique morphology of the 3D heterojunction, significantly contributes to the enhanced performance of the device.
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高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 27
·2311830
·
IF 27.4
Mengxuan Yu,Ji Yang,Xingchen Zhang,Mohan Yuan,Jianbing Zhang,Liang Gao,Jiang Tang,Xinzheng Lan
Colloidal Quantum Dots (CQDs) of mercury telluride (HgTe) hold particular appeal for infrared photodetection due to their widely tunable infrared absorption and good compatibility with silicon electronics. While advances in surface chemistry have led to improved CQD solids, the chemical stability of HgTe material is not fully emphasized. In this study, it is aimed to address this issue and identifies a Se-stabilization strategy based on the surface coating of Se on HgTe CQDs via engineering in the precursor reactivity. The presence of Se-coating enables HgTe CQDs with improved colloidal stability, passivation, and enhanced degree of freedom in doping tuning. This enables the construction of optimized p-i-n HgTe CQD infrared photodetectors with an ultra-low dark current 3.26 × 10 −6 A cm⁻ 2 at −0.4 V and room-temperature specific detectivity of 5.17 × 10 11 Jones at wavelength ≈2 um, approximately one order of magnitude improvement compared to that of the control device. The stabilizing effect of Se is well preserved in the thin film state, contributing to much improved device stability. The in-synthesis Se-stabilization strategy highlights the importance of the chemical stability of materials for the construction of semiconductor-grade CQD solids and may have important implications for other high-performance CQD optoelectronic devices.
研究领域:
材料科学
·
光电子学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Chunyan Fan,Xuxin Song,Yao Tang,Zehao Zang,Yangyang Ren,Lanlan Li,Xiaofei Yu,Xiaojing Yang,Zunming Lu,Xinghua Zhang
Designing catalysts that simultaneously optimize both hydrogen and oxygen evolution reaction (HER and OER) emerges as a critical materials challenge. Co(OH)₂ is recognized as an effective OER electrocatalyst, but the low HER activity limits its application in overall water splitting. In this work, we synthesized sulfur (S) and selenium (Se) doped Co(OH) 2 catalysts with significantly enhanced HER activity using an electrochemical deposition method. The S-Co(OH) 2 and Se-Co(OH) 2 catalysts own low HER overpotentials of 48 mV and 59 mV at 10 mA cm −2 . And they require 1.56 V and 1.64 V at the same current density for water splitting, the sustain stable performance for > 100 h at current densities (100 mA cm −2 ) show their practical durability. Density Functional Theory (DFT) calculations and experimental results reveal that non-metal doping induces electronic reconfiguration of Co and optimizes the ΔG H* value for intermediate formation, thus accelerating hydrogen generation and enhancing the intrinsic HER activity. This work presents an effective strategy for incorporating non-metal elements into transition metal-based catalysts, and provides insight to boost HER intrinsic activity and achieve bifunctional catalytic performance for water splitting.
研究领域:
电化学
·
催化
·
材料科学
·
能量转换
·
纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yi Wang,Yuxin Wang,Yueting Wang,Jin Zhao,Yang Gao,Jingyi Liang,Tianjun Hu,Baoliang Lv,Ergui Luo,Jianfeng Jia
Carbon-based metal-free materials are emerging as leading candidates to replace noble-metal catalysts in the oxygen reduction reaction (ORR). Herein, we introduce a facile secondary carbonation technique for fabricating Se and N co-doped metal-free catalysts using a zeolite imidazole framework (ZIF-8) as the precursor. The optimal electrocatalyst, designated SeNC-900, exhibited good ORR performance under both alkaline and acidic conditions, with half-wave potentials of 0.864 V and 0.731 V (vs. RHE), respectively. Density functional theory (DFT) calculations reveal that the enhanced activity of SeNC-900 originates from Se doping, which triggers an increase in the intrinsic defects of sp 3 -hybridized C. Concurrently, the sp 3 -hybridized C, in concert with Se dopant, modulates the electronic structure of the active C atoms. This work not only underscores the significance of tuning the electronic structure to boost catalytic performance by enriching intrinsic defects but also presents a fresh insight into the effect of heteroatom doping on carbon-based materials for electrocatalysis.
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiaomeng Ni,Jingjing Liu,Fangxian Xu,Jing Zhang,Sai Jiang,Bijun Fang,Huafei Guo,Ningyi Yuan,Jianning Ding,Shuai Zhang
Doping the light absorber layer of antimony chalcogenides with extrinsic ions is an effective approach for improving their photovoltaic quality. These dopant ions generally reside at positions other than the crystal lattice or form an alloy (e.g., AgSb(S,Se) 3 ) with a poor device performance. Therefore, incorporating such ions into an antimony chalcogenide lattice such that there is a positive influence on device quality would be highly useful. Herein, doping of Nd 3+ for Sb 2 (S,Se) 3 is carried out via a modified hydrothermal deposition process. Notably, these ions are incorporated into the crystal lattice and migrate to the CdS/Sb 2 (S,Se) 3 interface after doping, which are characterized using X-ray diffraction, X-ray photoelectron spectroscopy, and time-of-flight secondary ion mass spectrometry. Nd 3+ doping produces benign effects on the crystal orientation, film morphology, optoelectronic properties, and defect passivation of the Sb 2 (S,Se) 3 films. Consequently, all the photoelectrical parameters of Sb 2 (S,Se) 3 solar cells doped with Nd 3+ are enhanced, delivering a remarkable efficiency of 8.24 %. Furthermore, the best device stored in air only shows a slight decrease in efficiency in the 2400-h aging test. Overall, this study provides an effective doping strategy to improve the photovoltaic quality of Sb 2 (S,Se) 3 films.
研究领域:
材料科学
·
能源工程
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DOI
高影响因子
Small
·
2024
·
IF 13
Lei Zhang,Jianzha Zheng,Cong Liu,Yifei Xie,Hanyu Lu,Qinrong Luo,Yulong Liu,Huidong Yang,Kai Shen,Yaohua Mai
Antimony selenosulfide (Sb 2 (S,Se) 3 ) is an emerging quasi-1D photovoltaic semiconductor with exceptional photoelectric properties. The low-symmetry chain structure contains complex defects and makes it difficult to improve electrical properties via doping method. This article reports a doping strategy to enhance the efficiency of Sb 2 (S,Se) 3 solar cells by using alkali halide (CsI) as the hydrothermal reaction precursor. It is found that the Cs and I ions are effectively doped and atomically coordinate with Sb ions and S/Se ions. The CsI-doping Sb 2 (S,Se) 3 absorbers exhibit enhanced grain morphologies and reduced trap densities. The consequential CsI-doping Sb 2 (S,Se) 3 based solar cells demonstrate favorable band alignment, suppressed carrier recombination, and improved device performance. An efficiency as high as 10.05% under standard AM1.5 illumination irradiance is achieved. This precursor-based alkali halide doping strategy provides a useful guidance for high-efficiency antimony selenosulfide solar cells.
研究领域:
材料科学
·
光伏技术
·
半导体物理
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）