JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2023
·
IF 4.3
Hao Zou,Xiaokun Liao,Xingjian Lu,Xiaoyan Hu,Yue Xiong,Jun Cao,Jiaqi Pan,Chaorong Li,Yingying Zheng
Herein, phenylalanine-bound carbon dots (CDs) with dual fluorescence emission peak behavior were reported, one of which was excitation-dependent and the other was not. The amino and carboxyl groups on the surface of CDs had a certain influence on their fluorescence. When the amino and carboxyl groups on the surface of CDs were removed, their fluorescence was significantly weakened. The prepared CDs had solvent effect, and the emission peak of CDs shifted according to the change of the polarity of the solvent. Based on this, a method was developed for detecting water content in ethanol using CDs as a ratio probe. The change in the ratio of the intensity of the two emission peaks corresponded to the change of water content in ethanol. The detection linearity was good. In addition, the resulting CDs had good biocompatibility and could be enormously transported into cancer cells by the amino acid transporter on the surface of cancer cells, while normal cells only had a small amount of CDs through endocytosis, which laid the base for the distinguishing cancer cells from normal cells. The unique fluorescence properties of the prepared CDs achieved their applications in both water detection and cell differentiation.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2019
·Vol. 15
·期 17
·1805478
·
IF 10.856
Kai Jia,Jiahua Ye,Guoxin Zhuang,Zanyong Zhuang,Yan Yu
Fabrication of low-dimensional nano-MOFs as well as nanoparticles/metal-organic frameworks (MOFs) hybrids has sparked new scientific interests but remains a challenging task. Taking Cu 3 (BTC) 2 as a proof of concept, it is demonstrated thats NH 3 ⋅H 2 O solution of a confined pH value can readily shape the bulk Cu 3 (BTC) 2 into nanoscale Cu 3 (BTC) 2 , beyond the need to control the crystal growth kinetics of MOFs. Adjusting the pH of NH 3 ⋅H 2 O within a much small range (10–11) allows fine tuning over the size and shape of nanoscale Cu 3 (BTC) 2 . Particularly at pH = 11, NH 3 ⋅H 2 O exhibits weak reducibility that triggers a reduction of part of Cu 3 (BTC) 2 into Cu 2 O, while shaping the other into Cu 3 (BTC) 2 nanowires. Benefiting from the coincidence of reduction and etching effects, the newly generated Cu 2 O dots can in situ anchor onto adjacent Cu 3 (BTC) 2 nanowires at highly dispersive state, forming a well-defined sponge-like architecture built of Cu 2 O dots and nano-Cu 3 (BTC) 2 . The CuO x derived from annealing of the Cu 2 O dots/nano-Cu 3 (BTC) 2 hybrid preserves the sophisticated sponge architecture and high porosity, and exhibits promising applications in phenol scavenging, with efficiency outperforming its counterparts and many other Cu-based catalysts reported in literature. It is anticipated that the findings here pave the way for the rational design of intricate nano-MOFs in a more efficient way.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2018
·Vol. 44
·期 5
·3135-3150
·
IF 1.674
Wang Cheng-zhi,Zhao Yong-gang,Zhang Cheng,Yan Xin,Cao Peng
Honeycomb cordierite-based Mn–Ce/Al 2 O 3 (Mn–Ce/Al 2 O 3 –C) and Fe–Mn–Ce/Al 2 O 3 (Fe–Mn–Ce/Al 2 O 3 –C) catalysts were prepared by an impregnation method and investigated in low-temperature selective catalytic reduction (SCR) of NO with NH 3 at 100 °C. The Fe–Mn–Ce/Al 2 O 3 –C catalyst exhibited not only higher catalytic activity, but also much better SO 2 and H 2 O resistance in the presence of 30 ppm SO 2 and/or 5 vol% H 2 O than Mn–Ce/Al 2 O 3 –C. After doping Fe, the NO conversion of Mn–Ce/Al 2 O 3 –C catalyst displayed an increasing trend from 79 to 84% in the absence of SO 2 and H 2 O at 100 °C under a gas hour space velocity of 1667 h −1 . The results of characterization indicated that addition of Fe was advantageous to increase BET surface area, pore volume and inhibit loss of surface Mn and Ce species. Additionally, it was helpful for generating higher concentration of Mn 4+ , more chemisorbed oxygen and more uniform dispersion of amorphous Mn and Ce in the surface of catalyst, which were beneficial to interact with reactants. Furthermore, in contrast to Mn–Ce/Al 2 O 3 –C, the SCR activity of Fe–Mn–Ce/Al 2 O 3 –C catalyst in the presence of H 2 O, SO 2 and H 2 O and SO 2 were 79, 75 and 64%, with the increase of 14, 18 and 19%, respectively. It is indicated that the addition of Fe could inhibit sulfate formation and thus enhance SO 2 resistance. XPS results reveal that the doping of Fe into the ceria lattice led to some Ce 4+ transferred into Ce 3+ in order to maintain the electrical neutrality, thereby facilitating the reduction of Ce 4+ → Ce 3+ and the formation of oxygen vacancies. NH 3 temperature-programmed desorption (TPD) results imply that the doping of Fe onto Mn–Ce/Al 2 O 3 –C can remarkably improve the distribution and concentration of acid sites. All the above factors contributed to the improvement of overall NH 3 SCR performance of the Fe–Mn–Ce/Al 2 O 3 –C catalyst compared with that of the Mn–Ce/Al 2 O 3 –C catalyst.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2016
·
IF 1.835
Dawei Li,Guangqian Li,Pingfeng Bian,Zhe Shen,Mengfan Fu,Wenjun Fang,Weidong Yan
Epigallocatechin gallate (EGCG) is the most abundant and active components in tea. In this text, the density and viscosity of ternary aqueous solution of EGCG containing LiCl/NaCl/KCl were determined at temperatures ranging from 288.15 to 308.15 K at atmospheric pressure. The density data was used to compute the apparent molar volumes (Vφ), limiting partial molar volumes (Vφ0), and transfer partial molar volumes (ΔtrsVφ0). The viscosity B-Coefficients were calculated from the measured viscosity data using the extended Jones–Dole equation. The values of density and viscosity increased continuously with the increasing of molality of EGCG and decreased with the temperature increasing. The positive values including (Vφ, Vφ0, ΔtrsVφ0, viscosity B-Coefficients, the free energies of activation for solvent Δμ10≠, and for solute Δμ20≠) and Helper’s constant (∂2Vφ0/∂T2)p close to zero indicated the presence of strong solute–solvent interactions and the structure–making effect of EGCG in the investigated solutions. The apparent molar isobaric expansions (Eφ0) decreasing with temperature suggested that the solute–solvent interactions became weaker as temperature increased. These significant parameters could provide necessary data about molecular interactions occurring in simulated body fluids.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Linjia Li,Yiran Zhang,Xiaochao Wang,Junfeng Lu,Jiaqi Feng,Shu Zhao,Wei Qiu,Zhen Huang,He Lin
Integrated carbon capture and utilization (ICCU) technology based on Ca-Ni-based dual-function materials (DFMs) is an important carbon reduction measure. However, the severe performance degradation of DFMs caused by H 2 O is a challenge for ICCU. This study aims to improve the H 2 O resistance of Ce-doped Ni-Ca-based DFMs by Mg-Y co-doping. After 10 cycles with H 2 O, the carbon capture capacity, methane yield, and methane production rate were maintained at 11 mmol/g, 10.5 mmol/g, and 121.18 μmol/g·min, respectively. Changing the water vapor content (0 ∼ 10 %) has little effect on its performance. Characterizations (XRD, TEM, XPS, H 2 -TPR, CO 2 -TPD, NH 3 -TPD, H 2 -TPSR, and in-situ DRIFTS) and experiments (carbonation and conversion by H 2 O experiments) revealed a directional induced hydrogen spillover mechanism: The strong interactions of Ni-Mg and Ni-Y reduce the particle size and inhibit agglomeration; meanwhile, H 2 O can activate the Y-doped Ni-based catalyst in the carbonation process, inducing hydrogen spillover into the methanation reaction path during the subsequent conversion process, where Mg-promoted generated formaldehyde species act as a vital intermediate. It provides a novel idea to enhance the H 2 O resistance of DMFs to achieve stable ICCU performances.
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Yi-Gang Chen,Xiwei Hu,Yao Guo,Sangen Zhao,Bingbing Zhang,Xia Zhang,Xian-Ming Zhang
A challenging topic for tetrahedra-based deep-ultraviolet (deep-UV, wavelength λ < 200 nm) birefringence crystals is how to generate both large birefringence and high deep-UV transmittance. Edge-sharing tetrahedra can induce large structural distortion and thus could produce strong optical polarization anisotropy to realize the challenging topic, but edge-sharing tetrahedra frequently require extreme synthesis conditions to overcome large repulsion interaction between tetrahedra. Herein, under mild hydrothermal conditions, an α-Be3(H2O)2(PO4)2 crystal with edge-sharing BeO4 and its polymorph β-Be3(H2O)2(PO4)2 with common corner-sharing BeO4 were synthesized, both featuring a three-dimensional stable structure constructed by BeO4, BeO2(H2O)2, and PO4 tetrahedral units. Remarkably, α-Be3(H2O)2(PO4)2 manifests superior birefringence of 0.101 and high deep-UV transmittance of 167 nm, with the largest birefringent quality factor (BQF) of 0.75 among the known tetrahedra-based deep-UV materials. By contrast, β-Be3(H2O)2(PO4)2 manifests a small birefringence of 0.019 and 160 nm deep-UV transmittance, with only a mediocre BQF of 0.15. Further, computational investigations reveal that edge-sharing BeO4 makes a dominant contribution to the great birefringence. This study could push the synthesis of edge-sharing-tetrahedra materials and offers an alternative strategy toward designing high-performance tetrahedra-based deep-UV birefringence materials.
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Chemistry and Pharmacy
·
2025
·
IF 5.8
Yang Liu,Shuo Zhang,Tingwei Zhang,Yongcan Jin,Huining Xiao,Chaofeng Zhang
5-Hydroxymethylfurfural (HMF) is a versatile biomass-derived platform compound, but its production from glucose and cellulose remains challenging. In this study, several nano-metal oxides (Al 2 O 3 , TiO 2 , ZrO 2 , and SnO 2 ) with distinct Lewis acidities were combined with a trace amount of HCl to catalyze the conversion of glucose to HMF in a methyl isobutyl ketone (MIBK)/H 2 O–NaCl biphasic system. Without HCl, fructose was formed and accumulated in the aqueous phase due to insufficient Brønsted acidity, limiting further dehydration to HMF. The addition of HCl effectively overcame this bottleneck, with Al 2 O 3 and HCl showing the best synergy. Under optimized conditions, a HMF yield of 69.1 % was achieved at 180 °C, and Al 2 O 3 exhibited excellent recyclability. This work demonstrates a promising approach for combining homogeneous and heterogeneous catalysis for efficient conversion of renewable carbohydrates into platform chemicals.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Wenzhao Wei,Donggang Wang,Haibin Sun,Fangyong Yu,Xue Guo,Qiangqiang Hu,Yurun Feng,Hongli He,Xin Kong
Medium-entropy BaZr 0.1 Ce 0.5 Y 0.2 Dy 0.2 O 3-δ (BZCYD) electrolytes with a configurational entropy of 1.22 R are prepared by doping Dy element into low-entropy BaZr 0.1 Ce 0.7 Y 0.2 O 3-δ ( BZCY, 0.80 R). The entropy increasing strategy makes dramatically contribution to the improved chemical stability against CO 2 and H 2 O, and the relevant mechanism is clarified by the density functional theory (DFT). The BZCYD electrolyte shows stable phase composition and micro-structure after CO 2 heat treatment at 700 °C for 3 h and H 2 O treatment boiled for 3 h, while generation of impurities of BaCO 3 and Ba(OH) 2 accompanied by destroyed micro-structure are formed in the BZCY electrolyte under the same conditions. The total conductivity decay rates of BZCYD electrolyte after CO 2 heat treatment and H 2 O treatment are 44.1 % and 52.5 %, respectively, which exhibit significantly better than those of BZCY electrolyte (88 % and 74 %). According to the first-principles calculation, BZCYD electrolyte has higher CO 2 reaction energy barrier (5.21 eV) and H 2 O reaction energy barrier (7.30 eV), as well as lower CO 2 adsorption energy (−5.182 eV) and H 2 O adsorption energy (−0.742 eV), so it has better chemical stability. The peak power density of the anode-supported single cell with BZCYD electrolyte is 510 mW cm −2 at 700 °C in humid H 2 .
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2022
·
IF 6.137
Rumin Ma,Jingpeng Li,Shenjie Han,Zaixing Wu,Yongjie Bao,Sheng He,Yuhe Chen
In this study, different morphologies of WO 3 ⋅H 2 O/TiO 2 (WT) heterojunction films were successfully synthesized on bamboo biotemplate via facile two-step hydrothermal deposition methods. The WO 3 ·H 2 O self-assembled by nanosheets or nanoplates on anatase TiO 2 -coated bamboo (TiO 2 -B) exhibited a distinctive surface color. The addition of WO 3 ·H 2 O could significantly extend the optical responses of TiO 2 -B in the ultraviolet to the visible region. Based on the various analysis techniques, the formation mechanisms of the WO 3 ·H 2 O hierarchical architectures with different crystal structures were also proposed. In addition, the photoactivity and post illumination activity of WT films were examined by constructing ·O 2 ˉ and ·OH in light and in light-off, respectively. The results showed that WT films with different crystal structures exhibited different photoactivity and energy storage abilities, and the photoactivity of WT films was negatively correlated with their energy storage ability. The presence of an anatase TiO 2 thin film on the bamboo surface provided abundant active sites for WO 3 ·H 2 O growth, which formed direct S-scheme heterojunctions for solar energy conversion and storage. Therefore, we anticipate that solar-driven energy storage heterojunctions with accessible and rich crystal morphologies will provide new insights for various applications, such as efficient wastewater treatment , self-cleaning coating, and air purification.
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 10
·3121-3130
·
IF 7
Qian-Qian Chen,Chun-Li Hu,Bing-Xuan Li,Jiang-Gao Mao
Exploration of new iodates is crucial due to their splendid applications in the nonlinear optical (NLO) field. Two new IIIA metal iodate–selenates, namely, [M(OH)2]3(IO3)(SeO4)·H2O (M = Ga and In), have been successfully synthesized using the hexagonal tungsten oxide (HTO) framework as an ideal structural template. Isostructural [M(OH)2]3(IO3)(SeO4)·H2O (M = Ga and In) crystallize in the polar space group P63mc. Their structures feature ∞[MO2(OH)2]3− (M = Ga, In) layers composed of corner-shared circular M3O6(OH)9 trimeric units based on MO2(OH)4 octahedra. The SeO4 groups are capped above half of the trimeric units of the layers while the IO3 groups are capped below the remaining trimeric units of the layers. Both compounds exhibit moderate phase-matchable second-harmonic generation (SHG) responses (2.9× and 3.8× KH2PO4) under 1064 nm laser radiation and the same band gap of 3.38 eV. Results of theoretical calculations revealed that their SHG effects originated from the synergistic effect of MO6, IO3 and SeO4 groups. So far reports on iodate–selenates are scarce and this work provides a new perspective to design new NLO materials through polar HTO-type topologies and a mixed-anionic strategy.
研究领域:
材料科学
·
晶体学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 20
·5377-5385
·
IF 7.779
Ru-Ling Tang,Gang-Xiang Liu,Wen-Dong Yao,Li-Nan Zhang,Wenlong Liu,Sheng-Ping Guo
Phosphite materials have aroused wide attention due to their diverse open frameworks and promising magnetic and optical performances. Here, the first barium scandium phosphite, BaSc2(HPO3)4(H2O)2, was obtained via a facile hydrothermal route. BaSc2(HPO3)4(H2O)2 crystallizes in the polar space group Pn and exhibits a 3D {[Sc2(HPO3)4]2−}∞ anion framework constructed by distorted ScO6 octahedra and HPO32− anion groups. BaSc2(HPO3)4(H2O)2 can exhibit a phase-matchable SHG response of about 0.94 × KH2PO4 at 1064 nm, and a moderate birefringence (0.036@1064 nm) to satisfy the phase-matchable behavior requirement. Deep investigation of its structure–property relationship based on theoretical calculations has also been presented in this work.
研究领域:
材料科学
·
晶体学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Zehui Shang,Chunying Zhu,Taotao Fu,Youguang Ma
A liquid-liquid AEP/DEEA/n-butanol/H 2 O absorbent is developed. • Multi-variable optimization of absorption and desorption is performed. • NMR reveals carbamate and bicarbonate/carbonate absorption pathways. • Desorption energy AEP/DEEA/n-butanol/H 2 O is 66% of that of 30 wt% MEA/H 2 O. High regeneration energy remains a major obstacle to the practical application of alkanolamine-based absorbents for CO 2 capture. To reduce the regeneration energy demand, a liquid-liquid phase-change absorbent composed of polyamine 1-(2-aminoethyl)piperazine (AEP), 2-(diethylamino)ethanol (DEEA), n-butanol and H 2 O was developed. The effects of composition and operating conditions on the absorption–desorption performance were systematically investigated, identifying 1.8:1.2 AEP/DEEA, 4:3 n-butanol/H 2 O, 30 wt% total amine, and 303.15 K as suitable microchannel absorption conditions. 13 C and 1 H NMR analyses showed that AEP mainly absorbed CO 2 via the carbamate pathway, whereas the tertiary amine site of AEP and DEEA mainly promoted CO 2 hydration to form HCO 3 − /CO 3 2− . Under the optimal composition of 18 wt% AEP, 12 wt% DEEA, 40 wt% n-butanol, and 30 wt% H 2 O, the volume fraction and CO 2 loading of the rich phase reached 48.68% and 3.42 mol CO 2 ·kg −1 solution, respectively. Under desorption at 363.15 K with 2 mL lean-phase addition for 60 min, the desorption efficiency and cyclic capacity reached 58.91% and 1.95 mol CO 2 ·kg −1 solution, respectively, while the apparent desorption energy consumption was only 66% of that of 30 wt% MEA. Overall, this phase-change absorbent achieved effective synergy among rapid absorption, reversible regeneration, and phase-separation intensification, demonstrating its potential for low-energy CO 2 capture.
✓ 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）