CHEMICAL ENGINEERING JOURNAL
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2019
·
IF 8.355
Shizong Wang,Jianlong Wang
High efficient and stable activator is desired for the sulfate radical-based wastewater treatment. Cobalt sulfide and cobalt oxide have high catalytic activity for peroxymonosulfate (PMS), but poor stability. Here, a novel composite, nano Co 9 S 8 and CoO encapsulated by nitrogen and sulfur co-doped sludge-derived biochar (CoO/Co 9 S 8 @N-S-BC) was synthesized, characterized and applied for activating PMS. The results showed that CoO/Co 9 S 8 @N-S-BC can effectively activate PMS for sulfamethoxazole (SMX) degradation, and 0.08 mM of SMX could be completely degraded within 10 min. The influencing factors, such as pH, temperature, chloridion, carbonate and humic acid were investigated. The SMX degradation conformed to pseudo first-order kinetics with rate constant of 0.379 min −1 . Sulfate radicals (dominant) and hydroxyl radicals contributed to SMX degradation. Carbon defects, pyridinic N, quaternary N, the carbon atoms next to pyridinic N, C O groups, -C-S-C and Co(II), all contributed to PMS activation.
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ACS Applied Energy Materials
·
2022
·
IF 6.959
Hongxia Liu,Shun Zhang,Yan Zhang,Shuotong Zong,Wang Li,Can Zhu,Feng Luo,Jian Wang,Zhigang Sun
SnSe is a promising medium-temperature thermoelectric material due to its extremely low thermal conductivity and tunable electronic transport properties. In this work, n-type SnSe0.95 polycrystals doped with CeCl3 are synthesized by a melting method combined with a spark plasma sintering (SPS) process. The samples have highly textured structures and anisotropic thermoelectric properties. CeCl3 doping has a favorable effect on the electronic transport above 473 K, which may benefit from the excitation of the introduced impurity energy level. Moreover, the thermal conductivity is significantly reduced due to the phonon scattering by point defects. Finally, a peak ZT value of 1.17 is obtained at 773 K in SnSe0.95–0.5 mol % CeCl3, which paves the way for improving the thermoelectric performance of n-type SnSe via rare-earth halide doping.
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ACS Applied Polymer Materials
·
2023
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IF 5
Li Jiang,Danni Qin,Chengfang Zhang,Jinbin Cui,Xinyue Xu,Rui Hu,Ping Zhang,Liang Hu
Hydrogel sensors that can accurately determine X-ray doses are crucial in the clinic. In this article, we reported radiofluorogenic poly(N-isopropylacrylamide) (pNIPAm)-based microgels for X-ray dose measurements. PNIPAm-based microgels were injected with two fluorescent moieties: hydroxyphenyl fluorescein, which is a radiofluorogenic molecule, and CdSe quantum dots, which were relatively unaffected by X-ray irradiation. Using single-wavelength excitation, our microgels showed a linear change in ratiometric fluorescent signals as a function of increasing the X-ray dose from 0 to 15 Gy. Furthermore, our microgel sensors had good temperature stability (25 to 65 °C) and postirradiation stability within 4 days. Importantly, we harnessed our sensors to determine X-ray doses in soft tissues and B16-F10 cells, to monitor absorbed doses by eye lenses using dedicated accessories for radiation safety glasses, and to verify intestine doses in the 3D-printed abdominal phantom under different radiation energies (160 keV, 225 keV, and 6 MV)/dose rates (1.225, 4, and 4.487 Gy/min). In each case, the doses determined by our sensors are comparable to the results of commercial ionization chambers, thermoluminescent dosimeters, and clinical treatment planning systems. Therefore, we believe our microgel sensors provide a method for clinical-level X-ray dose measurements.
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Science Advances
·
2023
·Vol. 9
·期 43
·
IF 13.6
Wei Zhao,Yiwei Zheng,Meng Jiang,Tingting Sun,Aibin Huang,Lianjun Wang,Wan Jiang,Qihao Zhang
Ionic liquid–based ionogels emerge as promising candidates for efficient ionic thermoelectric conversion due to their quasi-solid state, giant thermopower, high flexibility, and good stability. P-type ionogels have shown impressive performance; however, the development of n-type ionogels lags behind. Here, an n-type ionogel consisting of polyethylene oxide (PEO), lithium salt, and ionic liquid is developed. Strong coordination of lithium ion with ether oxygen and the anion-rich clusters generated by ion-preferential association promote rapid transport of the anions and boost Eastman entropy change, resulting in a huge negative ionic Seebeck coefficient (−15 millivolts per kelvin) and a high electrical conductivity (1.86 millisiemens per centimeter) at 50% relative humidity. Moreover, dynamic and reversible interactions among the ternary mixtures endow the ionogel with fast autonomous self-healing capability and green recyclability. All PEO-based ionic thermoelectric modules are fabricated, which exhibits outstanding thermal responses (−80 millivolts per kelvin for three p-n pairs), demonstrating great potential for low-grade energy harvesting and ultrasensitive thermal sensing.
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AICHE JOURNAL
·
2023
·Vol. 70
·期 1
·e18276
·
IF 3.7
Di Hu,Hong Xu,Yongjian Zeng,Lu Lin,Zhiwei Jiang,Kai Yan
The selective hydrogenation of biomass-derived benzoic acid (BA) to cyclohexane carboxylic acid (CCA) is vital to producing fine chemicals from renewable sources. Herein, a novel nitrogen-doped carbon supported bimetallic catalyst (Ni 1 Co 1 /NC) was synthesized via a PVP-assisted method to catalyze the selective hydrogenation of BA to CCA. Compared with the non-doped Ni 1 Co 1 /C and single counterparts, Ni 1 Co 1 /NC exhibited a substantially enhanced activity, with 98.1% yield of CCA. The excellent performance was attributed to the NiCo synergistic effect and N-doped thin carbon layer, which could increase the total proportion of Ni 0 and Co 0 species via donating electrons to Co and thus improve the H 2 adsorption capacity, the hydrogenation activity of aromatic rings in BA and the stability. This work demonstrates a synergetic effect between NiCo bimetal and N-doped thin carbon layer. This would pave the way for the rational design and synthesis of high-performance non-noble catalysts used in BA hydrogenation.
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SYNTHETIC METALS
·
2023
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IF 4.4
Ronghui Guo,Zhimin Ye,Haiyan Zhuang,Qi Zhao,Lai Jiang,Aming Xie
Due to stronger tunability, higher stability, and low production costs, polymeric material-based carbon materials are considered to have the potential to become high-performance electromagnetic wave absorbing (EWA) materials. In this work, polymer-derived carbon is made by pyrolyzing thermoplastic polyimide (TPPI) and thermosetting polyimide (TSPI) at different temperatures. Using Raman and XPS analysis , the graphitization degree and defect content of carbonized TPPI and TSPI are obtained. The reflection loss is calculated by through their electromagnetic parameters. The prepared carbonaceous materials exhibit excellent EWA performance. Specifically, the maximum effective absorption band (EAB max ) of carbonized TSPI at 1500 C can reach 4.1 GHz with thickness of 1.8 mm, and that of carbonized TPPI at 900 C can reach 4 GHz at lower thickness of 1.6 mm. The different structures of TPPI and TSPI result in different degrees of graphitization and defect content at the same temperature, which further leads to differences in their EWA performance. This work provides inspiration for studying the influence of precursor structure on the EWA preformation of carbon materials obtained through pyrolysis.
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ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Caiyun Xu,Hongwei Yang,Zhizhong Xie,Dan Liu,Hua Zheng,Xi Li,Ruiming Zhang,Haolin Tang,Junsheng Li,Deyu Qu
The rapid growth in energy demands and environmental concerns have drawn great attention to the development of new functional materials for sustainable energy technologies. As an emerging material, mesoporous carbon-based materials exhibit unique properties and have been considered promising candidates for electrochemical hydrogen storage applications. However, pure mesoporous carbon as electrode material may suffer from sluggish electrolyte transportation kinetic and poor hydrophilicity. Two-dimensional layered structure with high exposure area and nitrogen doping, which provides the improved accessibility of ions as well as the hydrophilicity of carbon materials, can cope with these two challenges. Here, the nitrogen-doped layered mesoporous carbon sheets, prepared by the double-hard-template route, were characterized using various technologies and investigated the electrochemically stored hydrogen energy properties. The results exhibit that hydrogen storage can be achieved around 104 mAh g −1 at 100 mA g −1 , and the capacity retention was 85.4% at 2 A g −1 . Moreover, it also displays superior cycling stability with a retention of 98% upon 300 cycles. According to the obtained results, the layered mesoporous carbon sheets demonstrated suitable capacity as a potential and promising active material for hydrogen-proton-related devices.
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ACS Chemical Neuroscience
·
2023
·
IF 5
Mingming Xu,Hong Jin,Wei Ge,Lingbo Zhao,Zhaoliang Liu,Zeyu Guo,Zhen Wu,Jing Chen,Chengjie Mao,Xumin Zhang,Chun-Feng Liu,Shuang Yang
Urine is thought to provide earlier and more sensitive molecular changes for biomarker discovery than blood. Numerous glycoproteins, peptides, and free glycans are present in urine through glomerular filtration of plasma, cell shedding, apoptosis, proteolytic cleavage, and exosome secretion. Urine biomarkers have enormous diagnostic potential, and the use of these biomarkers is a long-standing practice. The discovery of non-urological disease biomarkers from urine is also gaining attention due to its non-invasive sample collection and ease of analysis. Abnormal protein glycosylation in plasma or cerebrospinal fluid has been associated with Parkinson’s disease, however, whether urine with Parkinson’s disease has characteristic glycosylation remains to be explored. Here, we use mass spectrometry-based glycomics and glycoproteomics approaches to analyze urine samples for glycans, glycosites, and intact glycopeptides of urine samples. Reduced abundance of N-glycans was detected at the level of total glycans as well as specific glycosites of glycopeptides. The most abundant N-glycan in urine is S(6)1H5N4F1; S(6)2H5N4 and N4H4F1 are highly present in serum and urine, and 10 biantennary galactosylated N-glycans in the urine of PD patients were significantly decreased. The downregulation of sialylation may be due to the reduction of ST3GAL2. Site-specific N-glycosylation analysis revealed that AMBP, UMOD, and RNase1 have PD-specific N-glycosylation sites. GO and KEGG analysis revealed that N-glycosylation changes may provide clues to identify disease-specific glycosylation biomarkers in Parkinson’s disease.
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ChemistrySelect
·
2023
·Vol. 8
·期 37
·e202301117
·
IF 2.1
Mengting Chen,Meihua Zhang,Xiaoshuang Liu,Yingxin Liu
Graphical Herein, we report a highly efficient synthesis of N -arylhydroxylamines through controllable hydrogenation of nitroarenes using hydrazine hydrate as a hydrogen donor over Pt/C catalyst at a low temperature (30 °C). The synthesis of N -arylhydroxylamines through the in-situ hydrogenation of nitroarenes over commercial Pt/C catalyst was investigated. The effects of various reaction conditions including hydrogen donor, solvent, catalyst dosage, temperature and reaction time on the selective hydrogenation of nitrobenzene (NB) to N -phenylhydroxylamine (PHA) were systematically investigated. The results showed that the yield of N -phenylhydroxylamine reached 87.2 % using hydrazine hydrate as hydrogen donor in N,N -dimethylformamide solvent at 30 °C for 60 min. And the catalyst showed no obvious activity loss after a 6-times recycle. Meanwhile, the developed methodology can also transform a range of nitroarenes to the corresponding N -arylhydroxylamines in excellent yields (74–99 %).
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ACS Applied Materials & Interfaces
·
2015
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IF 6.723
Hai-Xia Wu,Lei Tan,Zhao-Wen Tang,Mei-Yan Yang,Jian-Yun Xiao,Chuan-Jun Liu,Ren-Xi Zhuo
This work presented a highly efficient antibacterial Ti-surface which was grafted with poly(N-hydroxyethylacrylamide) (PHEAA) brush and further decorated with triclosan (TCS). The modified surfaces were characterized using contact angle measurements, X-ray photoelectron spectroscopy, and attenuated total reflectance Fourier transform infrared. The antibacterial performance of the modified surfaces was evaluated using the Streptococcus mutans and Actinomyces naeslundii attachment test. The Ti surface with PHEAA brush (Ti-PHEAA) was able to resist the adhesion of the bacteria, while the TCS-decorated Ti surface (Ti-TCS) showed the capability of killing the bacteria adhered on the surface. As we coupled the TCS to the PHEAA brush, the surface showed highly efficient antibacterial performance due to the combination of the resistance to the bacteria adhesion and its activity of killing bacteria.
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ACS Applied Energy Materials
·
2023
·
IF 6.4
Jinghong Chen,Wei Yuan,Yaopeng Wu,Xiaoqing Zhang,Simin Jiang,Bote Zhao,Yu Chen,Chenghao Yang,Liangxin Ding,Yong Tang,Xinrui Ding
Motivated by the advancements in portable and wearable electronics, the rising necessity for microscale energy storage electronics has prompted extensive research on the efficient and cost-effective preparation of high-performance electrode materials. Herein, a facile fabrication method of N-doped graphene-based electrodes is demonstrated for in-plane microsupercapacitors (MSCs) on flexible textile. Our approach involves a one-step direct hot stamping of 10 s for efficient reduction of graphene oxide (GO) and simultaneously N doping into reduced GO (N-rGO). The degree of N doping is controlled by varying the concentrations of precursor chitosan (CS) in GO. Benefiting from the enhanced N doping, the N-rGO 15% electrodes prepared with a CS-to-GO mass ratio of 0.15 exhibit excellent volumetric capacitance of 42.2 F cm–3, exceptional energy density of 3.01 mWh cm–3, and a maximum power density of 31.57 mW cm–3, along with the outstanding mechanical flexibility and cycle stability. Besides, serial integration of the MSCs interwoven on short sleeves was also performed to light a customized LED, suggesting its potential as a power source in wearable devices. Therefore, the proposed hot stamping strategy offers insights for the development of an integrated and multifunctional textile.
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OPTICS EXPRESS
·
2023
·Vol. 32
·期 1
·366-378
·
IF 3.8
Feida Li,Kangning Liu,Jun Dai
Flexible perovskite solar cells (F-PSCs) prevail in the clean energy field for their light weight, easy fabrication and installation, but the power conversion efficiency of F-PSCs needs further improvement. In this work, we numerically simulate and experimentally demonstrate the effect of the perovskite trap defects density on the power conversion efficiency. The pseudo-halide KBF4 is employed as the additive to passivate the trap defects in the perovskite films. The high electrophilicity of BF4- group ensures its entering into perovskite lattice, optimizing crystallinity and improving the qualities of perovskite films, K+ ions can effectively passivate grain boundaries and inhibit halide anion migrations. After KBF4 passivation, trap defect density of the perovskite film was decreased from 8.0 × 1015cm−3 to 3.9 × 1015cm−3, and also the carrier lifetime increased from 108.52 ns to 234.72 ns. Consequently, the power conversion efficiency (PCE) of the F-PSCs devices increased from 13.99% to 16.04%.
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