JOURNAL OF CRYSTAL GROWTH
·
2018
·
IF 1.742
Ziqing Li,Yang Chen,Pengfei Zhu,Nianjing Ji,Xiulan Duan,Huaidong Jiang
The RbTiOPO 4 :Ta single crystal with dimensions of 4 mm × 31 mm × 18 mm was successfully grown by Top Seeded Solution Growth Technique. It is concluded that the doping Ta element can strongly influence the growth and morphology of the RbTiOPO 4 crystal. The evident morphology change of RbTiOPO 4 :Ta crystal with respect to RbTiOPO 4 crystal has been observed and the (1 0 0) crystal face was more developed than any other crystal faces. The possible reasons of the morphology change were analyzed through experimental and theoretical methods. Several methods were tried to increase crystallographic a direction dimension of RbTiOPO 4 :Ta crystals. Finally, the RbTiOPO 4 :Ta single crystal with crystallographic a direction dimension up to 6 mm was obtained by using thicker seed crystal. This way makes it possible to get isometric RbTiOPO 4 :Ta crystals, which is beneficial for nonlinear optical applications due to larger area in x-y plane.
研究领域:
材料科学
·
晶体学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Huiyong Wu,Jianfeng Zhang,Tingting Dong,Yue Cheng,Xuesheng Hu,Huizhou Liu,Liangrong Yang
To address the growing demand for lithium amidst its limited supply, it is crucial to explore diverse and economically viable lithium resources to alleviate the pressure. Oilfield brine offers significant potential, particularly due to their reduced land and freshwater requirements for lithium extraction, which dramatically lowers costs and provides environmental benefits. However, the recovery of lithium from oilfield brine is relatively under-explored yet due to highly excess of coexisted magnesium and particularly calcium as well as extensive pretreatment process. To tackle this challenge, we reported a direct lithium extraction method using tris(2-ethylhexyl) phosphate (TOP)-FeCl 3 solvent extraction system in this work. The proposed system achieved superior Li + binding affinity with 77 % extraction in single stage and especially ultrahigh selectivity for Li + /Mg 2+ (separation factor: 5737) and Li + /Ca 2+ (separation factor: 96) from real oilfield brine containing 52.1 g‧L -1 Mg 2+ and 84.4 g‧L -1 Ca 2+ . The results significantly outperform traditional tri-n-butyl phosphate (TBP)-FeCl 3 system, where Li + /Ca 2+ selectivity is neglectable. The extraction mechanism was investigated using UV–visible, Raman spectroscopy, ESI-MS and slope ratio method, suggesting [Li‧2TOP·2H 2 O][FeCl 4 ] may be the active lithium complex species during extraction process in our system. The increased hydrophobicity and extended carbon chain compared to TBP molecule may contribute to the extraordinary selectivity and stability. This work presents a comprehensive extraction process and offers new insights into optimizing extractant structures to achieve enhanced selectivity. These results demonstrate that TOP-FeCl 3 extraction system is highly promising for the industrial recovery of Li + from real oilfield brine.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2019
·
IF 3.315
Tao Zhang,Tao Jiang,Zhihong Liu
The N235–TOP–sulfonated kerosene system was applied for the recovery of Ge(IV) from a synthetic sulfuric acid leaching solution of secondary zinc oxide , containing Ge(IV), Zn(II), As(III), Fe(III), Si(IV), and Cd(II). The co-extraction of As(III) with Ge(IV) is a challenging problem in the extraction of Ge(IV) from aqueous solution by N235. However, TOP, as a modifier, suppressed the co-extraction of As(III) significantly. The effects of factors including N235 concentration, extraction time, tartaric acid to Ge(IV) molar ratio and temperature on the extractions of Ge(IV) and As(III) were studied. At an organic/aqueous (O/A) phase ratio of 1/1, aqueous phase pH of 1.2, extraction time of 10.5 min, tartaric acid-to-Ge(IV) molar ratio of 5.0, and temperature of 25 °C, the extraction efficiency of Ge(IV) reached 93.9%, whereas only 1.3% of As(III) was extracted by the 25%(v/v)N235–10%(v/v) TOP–sulfonated kerosene system in a single stage extraction. The Ge(IV) in the raffinate was less than 1.5 mg/L when employing a five-stage continuous countercurrent extraction at an O/A ratio of 1/10. In addition, aqueous NaOH solution of 0.5 mol/L was an appropriate reagent for the stripping of both Ge(IV) and As(III) at an O/A ratio of 1/1 and 25 °C for 10.0 min.
研究领域:
冶金工程
·
化学工程
✓ 已验证
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Li Wang,Jianfeng Zhang,Shixin Meng,Huiyong Wu,Yunze Zhao,Zhen Meng,Lei Feng,Huanting Wang,Yuan Cheng,Liangrong Yang,Huizhou Liu
The dissolution loss of extractant into aqueous solution during lithium solvent extraction from salt lakes poses a significant issue. We found that branched chains of neutral organophosphorus extractants provide suitable steric hindrance, enhancing lithium extraction efficiency and Li/Mg selectivity. Additionally, increasing the number of alkyl chains in organophosphorus extractants increases their hydrophobicity, thereby reducing extractant dissolution loss during the extraction process. Based on these findings, a novel extraction system comprising tri(2-ethylhexyl) phosphate (TOP), FeCl 3 , and 4-methyl-2-pentanone (MIBK) was explored. The extraction conditions, including the Fe/Li molar ratio, diluents, phase ratio, and stripping conditions, were thoroughly investigated and optimized. The extraction mechanism was elucidated at the molecular level using FT-IR, Raman, NMR, and density functional theory (DFT) calculations. The results demonstrated that the TOP-FeCl 3 -MIBK system achieved an 85 % extraction efficiency for Li + in a single stage, with a Li + /Mg 2+ separation factor reaching 5842, surpassing previously reported data in the literature. 31 P NMR and 7 Li NMR analyses revealed that the TOP and tributyl phosphate (TBP) complexes existed in different forms within the organic phase. Slope analysis indicated that the stoichiometric ratio of the extraction complex involving Li + , TOP, and MIBK was LiFeCl 4 ·TOP·MIBK. Furthermore, DFT calculations indicated that the TOP complex was more stable than the TBP complex after extraction. We anticipate that our findings will pave the way for the development of a series of novel extractants with higher Li/Mg selectivity by enhancing steric hindrance and incorporating longer alkyl chains to minimize dissolution loss. We expect this research to inspire the development of similar neutral organophosphorus extractants.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Xinyi Lv,Yuqin Su,Hengyang Xiang,Linxiang Yang,Xinrui Chen,Yifei Wang,Kun Zhang,Jiahao Tang,Yuhui Ye,Bo Cai,Xueying Ma,Xiaoyong Wang,Haibo Zeng
Perovskite quantum dots (PQDs) are expected to be an ideal candidate for wide-color gamut displays owing to their high color purity. However, their color purity is challenged by remarkable spectral broadening due to non-uniform size distribution and crystal defects. Here, a ligand-ion (TOP-Zn) complex-modulating nucleation strategy is proposed to depress spectral broadening. This is achieved by enhancing the steric hindrance effect during lead-halogen octahedral assembly and reducing the reaction activity/sites of the system. This strategy is universal and has been confirmed to be effective for blue, green, and red PQDs, achieving narrowed spectral full-width-at-half-maximum (FWHM) of 15, 17, and 25 nm, respectively. These FWHMs are record-breaking and contribute to a wide color gamut coverage of ≈130% National Television Standards Committee and ≈100% Rec. 2020 standard. Meanwhile, these PQD-based light-emitting diodes (PeLEDs) exhibit a high external quantum efficiency (EQE) of exceeding 20% at their pure color range. These results provide a feasible path to achieve ultra-uniform and pure-color luminescent PQDs for wide-color gamut displays.
研究领域:
材料科学
·
显示技术
·
纳米科技
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 36
·期 9
·095203
·
IF 2.9
Xiaozong Huang,Wen Li,Linghang Kong,Xiaoyan Lu,Chengzhi Yang,Bingsuo Zou
Due to the easy transformation to the non-luminous yellow δ-CsPbI3 phase in air, α-CsPbI3 nanocrystalline materials with red light emission find limited applications. Lifting its structural stability is a challenge in its quantum dot (QD) lighting field. Here we studied the doping of Mn2+ ions (5.0%) and processing by a small amount (0.315 ml) of TOP molecules on the OA-capped CsPbI3 nanocrystals. It is found that after the successful introduction of Mn2+ into the CsPbI3 nanocrystal, the grain size reduces, which leads to a stronger quantum confinement effect than the undoped QDs, which leads to the blue shift of PL and absorption spectra. The incorporation of Mn2+ simultaneously reduced defects and lifted the luminescence efficiency and lifetimes of QDs, the cause for the above optical behavior is due to the formation of excitonic magnetic polaron (EMP) excitons near the bandedge. On the other hand, the treated TOP molecule on the OA-capped NCs did not significantly affect their room-temperature luminescence. However, it improved the low-temperature emission performances of QDs significantly. Moreover, the TOP-treated QDs fixed in the PMMA film can transform into rod-like shapes in acidic environments, giving strong stability for emission, especially for the Mn-doped CsPbI3 QDs. This work has been done to improve the stability and emission efficiency of related QDs through the EMP formation near band-edge and surface modification of CsPbI3 NCs, favoring their potential applications in display and low-temperature light-emitting devices.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2018
·Vol. 410
·期 15
·3587-3595
·
IF 3.307
Chen Guilin,Wu Jianlin,Li Na,Guo Mingquan
Rhamnus davurica Pall. ( R. davurica ) has been used as a traditional medicine for many years in China and abroad and shown a wide spectrum of biological activities. Previously, we reported the phytochemical fingerprinting profile of R. davurica , its distinct anti-proliferative activities against HT-29 and SGC-7901 cell lines, and the topoisomerase I (Top I) ligands based on bio-affinity ultrafiltration and HPLC-MS (UF-HPLC-MS). Nevertheless, among the 32 peaks detected in the fingerprinting profile, the common bioactive constituents responsible for the anti-inflammatory and anti-proliferative activities in the extracts remain elusive. To further explore the specific responsible components for their diversified activities and their potential action targets/mechanisms, the method based on bio-affinity UF-HPLC-MS using therapeutic targets like Top I and cyclooxygenase 2 (COX-2) was established to rapidly screen and identify the ligands binding to these known target enzymes. As a result, 12 components were revealed as potential Top I ligands along with 11 components as potential COX-2 ligands, where several components were revealed to possess both activities. Further validations of these bioactive components have also been conducted and confirmed their highlighted activities. This integrated method of UF-HPLC-MS exhibits high efficiency in rapidly screening for multi-target bioactive components responsible for multiple pharmacological effects from the complex natural products and could be very useful to explain the complex action mechanisms of herb medicines in a complex multi-component and multi-target mode at the molecular level.
Schematic diagram of UF-HPLC-MS assay to screen for Top I and COX-2 ligands. The principle of the assay usually involves the following steps: incubation, ultrafiltration, and identification.
研究领域:
药理学
·
植物化学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2024
·
IF 2.6
yufei Song,Xiaojie Guo,Wenxiang Mu,Xutang Tao,Zeliang Gao
β-Ga2O3 is an ultra-wide bandgap semiconductor with immense potential applications in high voltage, electronic devices, and deep-ultraviolet optoelectronic devices, etc. However, to date, the growth of bulk β-Ga2O3 crystals has predominantly utilized melt methods, which are heavily dependent on specific growth vessels. In this work, bulk crystal β-Ga2O3 with a size of 7 × 13 × 4 mm3 is grown using TeO2-Li2CO3 as flux by a top-seeded solution growth (TSSG) method for the first time. It is noteworthy that the saturation point of β-Ga2O3 in the flux has been reduced to 1023 K, significantly lower than its melting point of 2073 K. The resulting β-Ga2O3 crystal exhibits well-formed faces, predominantly the (010), (100), (01(-)1), and (11(-)1(-)) forms, which closely align with the ideal morphological predictions made by the Bravais-Friedel and Donnay-Harker methods.The full-width at half maximum (FWHM) of the rocking curves for the (010) oriented plane is determined to be 140.4″. This work provides a potential β-Ga2O3 crystal growth method with a little platinum loss at a low temperature.
研究领域:
材料科学
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Jiajun Zheng,Wendong Zhu,Jiaxing Xiong,Qiuxiang Wang,Rong Xuan,Xinrui Sun,Xinlei Gan,Xiaohui Liu,Like Huang,Yuejin Zhu,Jing Zhang
Power generation and architectural beauty are equally important for designing efficient and esthetically appealing bifacial perovskite solar cells (PSCs). In this work, efficient and multicolored p-i-n-structured PSCs are achieved by taking advantage of a dielectric/metal/dielectric (DMD)-type (MoO3/Ni/Ag/MoO3) transparent counter electrode. The MoO3/Ni underlayer effectively promotes the formation of a continuous and conductive ultrathin Ag transparent film, especially the 1 nm Ni seed layer adjusts the interface energy level between perovskite/MoO3 and Ag, resulting in Ohmic contact of the electrode to promote charge extraction and collection. The upper MoO3 layer with varied thicknesses realizes a spectrally selective antireflection coating, enhancing the rear-side efficiency and forming vivid rear-side colors by optical tuning. As a result, colorful bifacial perovskite solar cells with 20.6% front-side efficiency and 57.6–74.4% bifacial factor are obtained together with colorful rear-side appearance. The bifacial PSCs exhibit good stability by protection from the upper MoO3 layer. This work highlights an effective electric and optic design of the top electrode for artistic bifacial PSCs.
研究领域:
材料科学
·
能源技术
·
光电工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOMACROMOLECULES
·
2022
·
IF 6.978
Xiang Hao,Ziwen Lv,Hairong Wang,Jun Rao,Qiaoling Liu,Baozhong Lü,Feng Peng
Polysaccharide nanocrystals have led to the development of multifunctional and sustainable materials, but most are glucose-based carbohydrates derived from valuable natural sources. Here, we present a top-down strategy that enables one, for the first time, to isolate xylose-based hemicellulose nanocrystals from available industrial biowastes. By leveraging the selective oxidation of alkaline periodate, as high as 34 wt % solid yield is accessible. The hemicellulose nanocrystals exhibit platelet-like shapes (10–20 nm thickness, 30–80 nm wide), crystalline features, and superior dispersibility in water. We also showcase their successful interface applications for one-dimensional (1D) carbon nanotube (CNT) nanoinks and two-dimensional (2D) transition-metal dichalcogenide (TMD) nanozymes, which are comparable to the traditional cellulose nanocrystals. The scalable, low-cost, and sustainable hemicellulose nanocrystals can be envisioned to provide an alternative for glucose-based polysaccharide nanocrystals, as well as hold promise for the high-value utilization of biowastes.
研究领域:
材料科学
·
纳米技术
·
可持续性
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2020
·Vol. 38
·期 12
·1286-1293
·
IF 3.154
Fan Yue,Wang De-Hui,Yang Jin-Long,Song Jia-Ning,Li Xiao-Mei,Zhang Cheng-Lin,Wang Dong-Sheng,Chen Long-Quan,Cui Jia-Xi,Deng Xu
Polymer microspheres with uniform size, composition, and surface property have gained extensive researches in past decades. Conventional bottom-up approaches are using monomers or oligomers to build up desired polymer microspheres. However, directly shaping high-molecular-weight polymers into well-ordered polymer microspheres remains a great challenge. Herein, we reported a facile and efficient top-down approach to fabricate microspheres with high-molecular-weight polymer microfibers. By harnessing interfacial engineering-control during the polymer microspheres formation, uniformly sized microspheres could be produced with widely ranged diameters (from 10 µm to the capillary length of each polymer melt). The size limitation of this approach could be further extended by a controllable Plateau-Rayleigh instability phenomenon. Principally, the top-down approach allows fabrication of microspheres by various polymer melts with surface energy higher than 25 mN/m. Our work paves a way for green, cost-effective, and customizable production of a variety of functional polymer microspheres without any chemical reaction assistant.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Solar RRL
·
2025
·
IF 4.7
Mengmeng Cheng,Wang Zhao,Teng Liao,Yuanzhu Jiang,Junyan Xiao,Yi-Bing Cheng
The incorporation of hole-transporting material (HTM) is crucial for optimizing the photovoltaic performance of perovskite solar cells (PSCs). However, the standard spin-coating method commonly used in laboratories is not conducive to the large-scale preparation of HTMs for devices. In this study, we present a novel approach that employs conductive porous overlayers, specifically multi-walled carbon nanotube (MWCNT) films, to facilitate the fabrication of HTM layers. By integrating MWCNT films with HTM precursor solutions, we achieved the simultaneous formation of the HTM layer and the top electrode. Furthermore, selecting an appropriate additional cover layer allowed us to create an HTM layer characterized by uniform thickness and optimal contact with the MWCNT-based electrode. This innovative method eliminates the need for specialized equipment and enables PSC devices to achieve a power conversion efficiency of 17.58% with good stability. This streamlined approach holds significant promise for enabling large-scale, cost-effective production of high-performance perovskite solar cells while addressing the challenges associated with conventional HTM preparation techniques.
✓ 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）