JOURNAL OF POWER SOURCES
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2022
·
IF 9.794
Dekun Shi,Zhaojun Shi,Lixin Zhang,Yaan Cao
A series of halogen ions (Cl − , Br − , or I − ) modified Bi 2 MoO 6 (Bi 2 MoO 6 –Cl, Bi 2 MoO 6 –Br, or Bi 2 MoO 6 –I) are synthesized via a one-step solvothermal method . It is determined that the halogen ions (Cl − , Br − , or I − ) are modified on the surface of Bi 2 MoO 6 as the -Bi-Cl, -Bi-Br, or -Bi-I species (the connected Bi 3+ is coordinated with three lattice O2- ions in Bi 2 MoO 6 ). The -Bi-Cl, -Bi-Br, or -Bi-I species on the Bi 2 MoO 6 surface can act as highly active sites to polarize and activate the N 2 and H 2 O molecules adsorbed on the surface of catalysts. Moreover, due to the surface-modified -Bi-Cl, -Bi-Br, or -Bi-I species, the visible light absorption is improved, the separation of photogenerated charge carriers is promoted, as well the band structure is better matched with the redox potential of photoreduction of N 2 . As a result, the photocatalytic activity of Bi 2 MoO 6 –Cl, Bi 2 MoO 6 –Br, or Bi 2 MoO 6 –I is improved for photoreduction of N 2 into NH 3 compared with Bi 2 MoO 6 . Overall, this work provides new insights into the doping states of halogen ions, the surface-active sites, the band structure, the photocatalytic activity, and the mechanism for photoreduction of N 2 into NH 3 for Bi 2 MoO 6 with modification of halogen ions (Cl − , Br − , or I − ).
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CELLULOSE
·
2022
·Vol. 29
·期 14
·7629-7647
·
IF 6.123
Shen Chengpeng,Hu Chuanshuang,Zhang Weiwei,Lin Xiuyi,Qi Wei,Zhang Zhen,Gu Jin
Abstract Exploring environmentally benign and economic methods for the preparation of nanocelluloses with controllable morphology would promote their industrial production and utilization. Herein, cellulose I and II nanocrystals (CNC I and CNC II) of rod and sphere shapes were prepared directly from microcrystalline cellulose (MCC, cellulose I) via treatment by acidified zinc chloride molten salt hydrates. Upon adding a small amount of HCl (0.50/0.75/1.0 M) to ZnCl 2 (55/60/65%), the levels of cellulose swelling and hydrolysis could be tuned. Rod-like CNCs I (length: 181.3–279.3 nm) were obtained with 55% ZnCl 2 . Rod-like CNCs with size reduction along with spherical CNCs were produced as ZnCl 2 concentration increased to 60%. Further raising the ZnCl 2 concentration to 65% resulted in CNC II with exclusively spherical shape (diameter: 25.8–292.3 nm). Under the same ZnCl 2 concentration, CNCs produced with high HCl concentration exhibited improved crystallinity (up to 68.4%) and thermal stability (T max up to 343.5 °C). Furthermore, spherical CNC II displayed excellent suspension stability and emulsifying ability to stabilize oil/water Pickering emulsions. The best one stabilized 26% more emulsion volume than the commercially available CNCs and the emulsions showed shear and heat stability. Therefore, this study provides a sustainable method for production of CNCs with tailored characteristics and broad application potentials. Graphical abstract
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ACS Nano
·
2021
·
IF 15.881
Yang Yu,Guojian Yang,Shengrui Zhang,Mo Liu,Shujue Xu,Chunyu Wang,Minjie Li,Sean Xiao-An Zhang
Circular dichroism (CD) chiral sensing is very promising to meet the ever-increasing demands for high-throughput chiral analysis in asymmetric synthesis. However, it is still very challenging to sensitively quantify the composition of enantiomers in a wide concentration range because the existing sensing systems show either linear CD response resultant from stoichiometric chiral transfer or nonlinear CD response resultant from amplified chiral transfer and thus have the drawbacks of low sensitivity and narrow quantification range, respectively. Herein, we propose a sensing system of two-dimensional (2D) Au(I)-thiolate nanosheets. The disordered interligand interactions on the confined surfaces of nanosheets enable the formation of discrete amplified chiral domains around the adsorbed chiral analytes, resulting in a linearly amplified chiral transfer behavior, which provides a solution for highly sensitive and wide-range quantification of enantiomer compositions. Taking (1R, 2R)-(−)- and (1S, 2S)-(+)-1,2-diamino cyclohexanes as example analytes, the concentration and full-range enantiomeric excess (ee) values have been quickly determined by adsorbing them on the surface of Au(I)-MPA (MPA: 3-mercaptopropionic acid) nanosheets in the concentration range of 1.0 × 10–6 to 4.0 × 10–5 M. By engineering the surface functional groups, Au(I)-thiolate nanosheets can be extended to sense other types of analytes, and several polyols with multiple chiral centers have been sensed by boronic acid functionalized nanosheets at the 10–7 M level. The high performances, good extendibility, and one-pot high-yield aqueous synthesis ensure these Au(I)-thiolate nanosheets can be developed as a practical and powerful chiral sensing platform.
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JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Hailong Zhang,Jianying Qi,Fang Liu,Zhangxin Wang,Xiaoming Ma,Di He
Thallium (Tl) often enters the environment via mineral exploitation and utilization. The main restriction of Tl removal is the interference of high concentrations of coexisting ions in wastewater, therefore, enhancing the selectivity for Tl is essential to its treatment. Magnetic Prussian blue particles (Fe 3 O 4 @PB), an ion-sieving material with an open structure, were synthesized through a “one-pot” method at room temperature for the highly selective removal of Tl + . The removal percentage of Tl + was over 92% even when the concentration of coexisting ions (e.g. Zn 2+ , Cd 2+ , Cu 2+ , and Pb 2+ ) were 10,000 times higher than the initial concentration of Tl + . The maximal experimental removal capacity was 528 mg Tl/g Fe 3 O 4 @PB, and the removal percentage remained steady at pH 3–10. The high selectivity of Fe 3 O 4 @PB for Tl + is attributed to the fact that hydrated Tl + has a smaller hydrated diameter and a lower hydration free energy than other coexisting ions, while the rapid adsorption kinetics of Tl + results from the negative surface charge and the network of nanocapillaries of the Fe 3 O 4 @PB. Overall, a new low-cost material that is easy to synthesize and has superior Tl + removal capacity with extremely high selectivity for Tl + was obtained for effective magnetic removal of thallium from wastewater.
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CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Jingwen Luo,Zhiwei Zhang,Yingchun Zeng,Yanming Dong,Lixin Ma
Components of the extracellular matrix (ECM) are overexpressed in fibrotic liver. Collagen is the main component of the liver fibrosis stroma. Here we demonstrate that chondroitin sulfate coated multilayered 50-nm nanoparticles encapsulating collagenase and silibinin (COL + SLB-MLPs) break down the dense collagen stroma, while silibinin inhibits activated hepatic stellate cells. The nanoparticles were taken up to a much greater extent by hepatic stellate cells than by normal hepatocytes, and they down-regulated production of type I collagen. In addition, chondroitin sulfate protected the collagenase from premature deactivation. COL + SLB-MLPs were delivered to the cirrhotic liver, and the collagenase and silibinin synergistically inhibited fibrosis in mice. Immunofluorescence staining of liver tissues revealed that CD44, mediated by chondroitin sulfate, delivered the nanoparticles to hepatic stellate cells. This strategy holds promise for degrading extracellular stroma and thereby facilitating drug penetration into fibrotic liver and related diseases such as liver cirrhosis and liver cancer.
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MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Shi-Yun Cen,Xin-Yue Ge,Yao Chen,Ai-Jun Wang,Jiu-Ju Feng
Enhancement in the signals of electrochemical immunosensors via advanced nanomaterials is beneficial for developing immunoassay of cardiac troponin I (cTnI) with high sensitivity and selectivity. By virtue of K 3 [Fe(CN) 6 ] as a signal probe, an advanced label-free electrochemical immunosensor was fabricated for ultrasensitive detection of cTnI with trimetallic alloyed AuPtPd porous fluffy-like nanodendrites (AuPtPd FNDs), followed by assembly of the antibody (Ab). By virtue of the structural advantages, electronic effects and synergetic catalysis of the trimetals, such nanostructures showed large specific surface area to increase the loading of the cTnI Ab and amplify the electrochemical signals of the probe. The sensor displayed a wide linear range (0.01 ~ 100.0 ng mL −1 ) and a low detection limit ( LOD = 3 pg mL −1 ) under the optimal conditions, which showed great potential for detecting cTnI in serum samples. Furthermore, this biosensor provides an effective detection platform for analysis of other cardiac markers in practical samples.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Lida Xing,Chuanshuang Hu,Weiwei Zhang,Litao Guan,Jin Gu
Cellulose nanofibrils (CNFs) with cellulose I and II allomorphs were efficiently prepared by sulfuric acid hydrolysis of eucalyptus cellulose under three different conditions followed by mechanical treatments: (i) classical sulfuric acid hydrolysis of cellulose I (CNF-I), (ii) sulfuric acid hydrolysis of mercerized cellulose II (MNF-II), and (iii) solubilization and hydrolysis of cellulose I by concentrated sulfuric acid and subsequent recrystallization in water (RNF-II). Crystal structure, surface chemistry, morphology and thermal properties of three CNFs were investigated and compared. Three CNFs of 2–10 wt% were mixed with PVA to prepare biodegradable composite films. CNF allomorph had significant impact on crystal structure, mechanical and thermal properties of the PVA composites. The maximum Young's modulus of CNF-I/PVA, RNF-II/PVA and MNF-II/PVA were increased by 62, 32 and 44%, respectively. Addition of CNFs raised onset degradation temperature (T onset ) and thermal decomposition temperature (T max ) of PVA nanocomposite, while decreased the melting temperature (T m ). Temperature window (T onset − T m ) for the melt processing of nanocomposites (10 wt% CNF loading) were increased 2.8, 3.2 and 2.5 times for CNF-I/PVA, RNF-II/PVA and MNF-II/PVA, respectively. All composite films remained excellent transparency with addition of CNFs. This comparative study provided important knowledge of selecting CNF allomorph for fabrication of high-performance CNF/PVA composites.
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JOURNAL OF MOLECULAR LIQUIDS
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2022
·
IF 6.633
Pengshuai Zhang,Haiyan Luo,Lan Cui,Jixiu Deng,Shiyu Xie,Danfeng Liu,Shuqi Wang,Xiaoying Si,Zichao Wang,Yameng Wan,En Zhang,Xing Li,Lu Zhang
Solid-liquid equilibrium solubility of artemisinin (ART) Form I in twelve mono-solvents namely N, N-dimethylformamide (DMF), oxolane (THF), n -propanol (NPA), 4-methylpentan-2-one (MIBK), ethyl formate (EF), butyl acetate (BAC), 2-ethoxyethanol (EGEE), 1,4-Dioxane, 2-methoxyethanol (EGME), 2-propoxyethanol (EGPE), propyl acetate (NPAC) and 2-butoxyethanol (EGBE) from 283.15 K to 323.15 K were determined by a laser dynamic method under 0.1 MPa. The minimum solubility of ART (Form I) was found in NPA at 283.15 K (0.004541), the maximum mole fraction solubility of ART (Form I) was observed as 0.2523 in DMF at 323.15 K. At the temperature of 298.15 K, the experimental mole fraction solubility order of ART Form I in the tested solvents was DMF (0.1559) > 1,4-Dioxane (0.09117) > THF (0.08301) > MIBK (0.05054) > EF (0.04902) > NPAC (0.03860) > BAC (0.03658) > EGME (0.02031) > EGEE (0.01859) > EGPE (0.01817) > EGBE (0.01689) > NPA (0.007185). The solubility behavior was computationally correlated by Margules model, Wilson model, NRTL model, NRTL-SAC model, Buchowski-Ksiazczak λh model and UNIQUAC model, the total RMSD was no>0.025 in the selected models. With the help of Hansen solubility parameters (HSPs) analysis, molecular similarities of ART (Form I) in twelve mono-solvents were investigated. Besides, Hirschfeld surface analysis (HSs) was considered to evaluate the intermolecular interaction of artemisinin. Moreover, thermodynamic properties including Δ mix H , Δ mix G , Δ mix S , lnγ 1 , l n γ 1 ∞ of ART (Form I) in the selected solvents were estimated. All the negative Δ mix G and positive Δ mix S values indicated that the mixing process were spontaneous and entropy-increasing.
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Analytical Methods
·
2023
·Vol. 15
·期 35
·4555-4562
·
IF 3.1
Yu Cao,Haizhu Shi,Zhuo Lan,Kunlin He,Qian Chen,Chungu Zhang,Shun Feng,Lianhai Shan
Screening bioactive compounds from natural products is one of the most effective ways for new drug research and development. However, obtaining a single extract component on a large scale and with high purity from a complex matrix is still an arduous and challenging task. Herein, one metal mediated magnetic molecularly imprinted polymer (mMIP) was rationally designed and prepared for specifically capturing Aristolochic acid I (AAI). The preparation was done with copper(II) as binding pivot, (3-aminopropyl) triethoxysilane as functional monomer, and Fe3O4 as core, by a one-step sol–gel method. Under the optimized conditions, the apparent maximum binding amount of copper mediated mMIP (Cu-mMIP) reaches as high as 349.72 mg g−1, the highest among the reported AAI-MIPs. Moreover, the nanoparticles exhibit excellent specificity and selectivity, good reproducibility and stability, high superparamagnetism (60.32 emu g−1), and high imprinting efficiency (an imprinting factor of 7). By simulating an industrial-scale separation, 16.56 mg AAI (purity of 95.11%) is obtained after six cycles with 100 mg nanoparticles from 20 g Caulis aristolochiae manshuriensis (Guan-mu-tong). Notably, this takes only 3 hours and consumes 50 mL of methanol. The study provides a potent tool for the green, fast, and specific extraction of high-purity ingredients from natural plants in the manufacturing industry and conventional analysis in the lab.
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Acta Biomaterialia
·
2023
·
IF 9.7
Xiaowei Wang,Wenjun Zhang,Sheng Zeng,Liudi Wang,Bin Wang
Hepatic fibrosis is a common pathological process in chronic liver diseases, characterized by excessive reactive oxygen species (ROS), activated hepatic stellate cells (HSCs), and massive synthesis of extracellular matrix (ECM), which are important factors in the development of liver cirrhosis, liver failure, and liver cancer. During the development of hepatic fibrosis, ECM collagen produced by activated HSCs significantly hinders medication delivery to targeted cells and reduces the efficiency of pharmacological therapy. In this study, we designed a multifunctional hyaluronic acid polymeric nanoparticle (HA@PRB/COL NPs) based on autophagy inhibitor probucol (PRB) and collagenase type I (COL) modification, which could enhance ECM degradation and accurately target HSCs through specificity binding CD44 receptor in hepatic fibrosis therapy. Upon encountering excessive collagen I-deposition formed barrier, HA@PRB/COL NPs performed the nanodrill-like function to effectively degrade pericellular collagen I, leading to greater ECM penetration and prominent HSCs internalization capacity of delivered PRB. In mouse hepatic fibrosis model, HA@PRB/COL NPs were efficiently delivered to HSCs through binding CD44 receptor to achieve efficient accumulation in fibrotic liver. Further, we showed that HA@PRB/COL NPs executed the optimal anti-fibrotic activity by inhibiting autophagy and activation of HSCs. In conclusion, our novel dual-functional co-delivery system with degrading fibrotic ECM collagen and targeting activated HSCs exhibits great potentials in the treatment of hepatic fibrosis in clinic. Statement of significance The excess release of extracellular matrix (ECM) such as collagen in hepatic fibrosis hinders medication delivery and decreases the efficiency of pharmacological drugs. We aimed to develop a nano-delivery carrier system with protein hydrolyzed surfaces and further encapsulated an autophagy inhibitor (PRB) to enhance fibrosis-related ECM degradation-penetration and hepatic stellate cells (HSCs) targeting in hepatic fibrosis niche (HA@PRB/COL NPs). The COL of HA@PRB/COL NPs successfully worked as a scavenger to promote the digestion of the ECM collagen I barrier for deeper penetration into fibroid liver tissue. It also accurately targeted HSCs through specifically binding to the CD44 receptor and subsequently released PRB to inhibit autolysosome and ROS generation, thus preventing HSCs activation. Our HA@PRB/COL NPs system provided a promising therapeutic strategy for hepatic fibrosis in a clinic setting.
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ACS Nano
·
2023
·
IF 17.1
Yingying Niu,Xin Zhou,Wei Gao,Maixia Fu,Yule Duan,Jiandong Yao,Bing Wang,Mengmeng Yang,Zhaoqiang Zheng,Jingbo Li
Driven by the rapid development of autonomous vehicles, ultrasensitive photodetectors with high signal-to-noise ratio and ultraweak light detection capability are urgently needed. Due to its intriguing attributes, the emerging van der Waals material, indium selenide (In2Se3), has attracted extensive attention as an ultrasensitive photoactive material. However, the lack of an effective photoconductive gain mechanism in individual In2Se3 inhibits its further application. Herein, we propose a heterostructure photodetector consisting of an In2Se3 photoactive channel, a hexagonal boron nitride (h-BN) passivation layer, and a CsPb(Br/I)3 quantum dot gain layer. This device manifests a signal-to-noise ratio of 2 × 106 with responsivity of 2994 A/W and detectivity of 4.3 × 1014 Jones. Especially, it enables the detection of weak light as low as 0.03 μW/cm2. These performance characteristics are ascribed to the interfacial engineering. In2Se3 and CsPb(Br/I)3 with type-II band alignment promote the separation of photocarriers, while h-BN passivates the impurities on CsPb(Br/I)3 and promises a high-quality carrier transport interface. Furthermore, this device is successfully integrated into an automatic obstacle avoidance system, demonstrating promising application prospects in autonomous vehicles.
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Journal of Materials Chemistry C
·
2023
·Vol. 12
·期 4
·1386-1395
·
IF 6.4
Wang Fu,Wuqi Liu,Yaju Wei,Dan Liu,Songyu Li,Di Zhao,Xiaoping Wu,Lingbo Xu,Ping Lin,Can Cui,Xuegong Yu,Peng Wang
In studies addressing contact recombination, carrier-selective contacts (CSCs) have played a key role in crystalline silicon (c-Si) solar cells resulting in a higher photoelectrical conversion efficiency (PCE). Recently, wide-bandgap metal compound materials with extreme work functions or suitable energy band alignment have drawn considerable interest for CSC materials. Among them, cuprous iodide (CuI) is a very promising hole-selective layer, however, very little research has been conducted for c-Si solar cells. In this work, we have demonstrated that solution-processed CuI films act as effective full-area hole-selective contact layers for p-Si solar cells. Moreover, iodine (I2) doping suppresses the generation of I− vacancies (VI), and enhances the film conductivity due to an increase in copper vacancies (VCu). Aluminum ion (Al3+) doping further promotes the generation of more VCu and increases the work function of the CuI film. The proposed I2 and Al3+ co-doping strategy for CuI films significantly improves the passivating contact performance of the Al3+–I2:CuI/p-Si heterojunction, contributing to the significantly improved PCE from 15.12% to 18.28%, which is the highest for solution-processed copper-based hole transport layers for c-Si solar cells to date. The results demonstrate the great potential of the CuI hole-selective layer applied for highly efficient c-Si solar cells.
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