TOXICOLOGICAL AND ENVIRONMENTAL CHEMISTRY
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2025
·
IF 1.1
Haiyan Peng,Min Wu,Chao Yan,Jian Wan,Hongmao Zhang,Shumao Ding
Carbon nanotubes (CNTs) are ubiquitous in the environment and are widely used in industry and medicine, but their unspecified safety has raised concerns. This study aims to explore the potential hazards of carbon nanotubes. This study exposed different concentrations of single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) to HeLa cells. The results showed that exposure to SWCNTs and MWCNTs resulted in slow growth and decreased survival of HeLa cells. The oxidative stress and autophagy of the cells were intensified, the cell division was abnormal, and the number of S-phase cells was reduced. After 100 μg/ml MWCNTs exposure, the proportion of apoptotic cells increased, and the transcript levels of apoptosis-related genes like Caspase-3 and Bcl-2 were upregulated. In addition, each group’s differentially expressed proteins (DEPs) were mainly related to the regulation of protein catabolic process, glycogen metabolic process, nucleotide synthesis and processing, response to reactive oxygen species, and regulation of cell division and apoptosis. These findings suggest that CNTs induce toxic effects through oxidative stress, exacerbating autophagy and apoptosis, and reducing cell viability. Therefore, the harmful effects of CNTs on organisms should be comprehensively considered in their production and utilization.
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高影响因子
Journal of the American Chemical Society
·
2013
·
IF 10.677
Yu Zou,Xiong Su,Jiang Jiang
Cu2ZnSnS4 (CZTS) nanocrystals with different morphologies and phases have been synthesized in hot organic solvents such as dodecanethiol and oleylamine. The crystallographic phases could be controlled by the sulfur precursor and the ligand species of the metal salts used for the synthesis. When a highly reactive sulfur precursor and metal acetates were used, wurtzite CZTS nanocrystals were obtained. On the other hand, using a low-reactivity sulfur precursor or metal chlorides produced CZTS nanocrystals in a kesterite phase. The experimental results from systematic investigations indicated that the reaction rate between Zn and S precursors played a determining role for the growth of CZTS nanocrystals with different crystalline phases. A relatively faster reaction between Zn and S precursors in comparison to the Sn–S reaction favored the formation of a metastable wurtzite phase, which could be accelerated by increasing the reactivity of the S precursor. This work provided a safe and economical way to synthesize high-quality phase-controlled Cu2ZnSnS4 nanocrystals, especially wurtzite nanorods, for potential photovoltaic applications. Moreover, preliminary results show that the proposed mechanism also applies to the phase-controlled synthesis of other quaternary Cu2MSnS4 (M = Cd2+, Mn2+) nanocrystals.
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高影响因子
Journal of Energy Chemistry
·
2019
·
IF 5.162
Ziyang Jia,Hongzhang Zhang,Ying Yu,Yuqing Chen,Jingwang Yan,Xianfeng Li,Huamin Zhang
Lithium–sulfur (Li–S) batteries have great potential as an electrochemical energy storage system because of the high theoretical energy density and acceptable cost of financial and environment. However, the shuttle effect leads to severe capacity fading and low coulombic efficiency. Here, graphitic carbon nitride (g–C 3 N 4 ) is designed and prepared via a feasible and simple method from trithiocyanuric acid (TTCA) to anchor the polysulfides and suppress the shuttle effect. The obtained g–C 3 N 4 exhibits strong chemical interaction with polysulfides due to its high N–doping of 56.87 at%, which is beneficial to improve the cycling stability of Li–S batteries. Moreover, the novel porous framework and high specific surface area of g–C 3 N 4 also provide fast ion transport and broad reaction interface of sulfur cathode, facilitating high capacity output and superior rate performance of Li–S batteries. As a result, Li–S batteries assembled with g–C 3 N 4 can achieve high discharge capacity of 1200 mAh/g at 0.2 C and over 800 mAh/g is remained after 100 cycles with a coulombic efficiency more than 99.5%. When the C–rate rises to 5 C, the reversible capacity of Li–S batteries can still maintain at 607 mAh/g.
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JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Beibei Liu,Xiaohua Ren,Long Chen,Xiaoxin Ma,Qiong Chen,Qidi Sun,Lin Zhang,Pengchao Si,Lijie Ci
High efficient adsorption of radioiodine in nuclear waste has attracted extensive attentions all over the world. In this work, we fabricated sulfur and nitrogen co-doped graphene aerogels (SN-GA) through one-step hydrothermal method, and investigated its iodine adsorption behavior including adsorption kinetics and isotherms in water. Our results reveal that SN-GA exhibits a 3D porous architecture with thiophene-S, oxidized-S, pyridine-N, pyrrole-N and graphite-N co-doped into the sp 2 carbon frameworks. The adsorption experiment showed SN-GA has a maximum iodine adsorption capacity of 999 mg g −1 determined by Langmuir isotherm, and the adsorption process could be better described by the pseudo-second-order model.
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 5
·886
·
IF 5.719
Qianwen Jin,Yajing Yan,Chenchen Hu,Yongguang Zhang,Xi Wang,Chunyong Liang
The advantages of high energy density and low cost make lithium–sulfur batteries one of the most promising candidates for next-generation energy storage systems. However, the electrical insulativity of sulfur and the serious shuttle effect of lithium polysulfides (LiPSs) still impedes its further development. In this regard, a uniform hollow mesoporous Ni(OH)2@CNT microsphere was developed to address these issues. The SEM images show the Ni(OH)2delivers an average size of about 5 μm, which is composed of nanosheets. The designed Ni(OH)2@CNT contains transition metal cations and interlayer anions, featuring the unique 3D spheroidal flower structure, decent porosity, and large surface area, which is highly conducive to conversion systems and electrochemical energy storage. As a result, the as-fabricated Li-S battery delivers the reversible capacity of 652 mAh g−1after 400 cycles, demonstrating excellent capacity retention with a low average capacity loss of only 0.081% per cycle at 1 C. This work has shown that the Ni(OH)2@CNT sulfur host prepared by hydrothermal embraces delivers strong physical absorption as well as chemical affinity.Keywords:Li-S battery;carbon nanotube;nickel hydroxide;cathode
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高影响因子
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
·
2014
·Vol. 98
·期 21
·8947-8962
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IF 3.811
Liu Jiyuan,Yang Xueqing,Zhang Yalin
In insects, glutathione S -transferases (GSTs) are enzymes involved in detoxification of insecticides. However, few data are available for the codling moth, Cydia pomonella (L.). In this study, we cloned a delta class GST gene CpGSTd1 from C. pomonella . Real-time quantitative PCR shows that CpGSTd1 was up-regulated with aging, and the mRNA level of CpGSTd1 was higher in the fat body and silk glands than in other tissues. The expression level of CpGSTd1 exposure to insecticide suggests that CpGSTd1 is up-regulated after chlorpyrifos-methyl and lambda-cyhalothrin treatments. Both lambda-cyhalothrin and chlorpyrifos-methyl altered GST activity in vivo. The purified CpGSTd1 protein exhibits a high catalytic efficiency with CDNB and was inhibited by lambda-cyhalothrin and chlorpyrifos-methyl in vitro. Metabolism assays indicate that lambda-cyhalothrin was significantly metabolized while chlorpyrifos-methyl was not metabolized by CpGSTd1. Binding free energy analysis suggests that CpGSTd1 binding is tighter with lambda-cyhalothrin than with chlorpyrifos-methyl. Our study suggests that CpGSTd1 plays a key role in the metabolism of insecticides in C. pomonella .
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高影响因子
MRS Communications
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2022
·Vol. 12
·期 5
·780-785
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IF 2.935
Zhang Jianqiao,Luo Fengting,Pi Mingyu,Ran Feng,Chen Shijian
The development of non-noble metal-based electrocatalysts is still a challenge for electrochemical water-splitting technology. Herein, we successfully fabricated a novel three-dimensional sulfur (S)-doped WP 2 nanowires (NWs) on carbon cloth (CC) as a self-supported electrode for electrocatalytic HER in alkaline media. The optimized S-doped WP 2 NWs acquire the low overpotentials of 180 mV at 100 mA cm −2 . The S-doping is proved to enlarge the specific surface area, reduce the charge transfer resistance, and optimize the electronic structure of WP 2 NWs/CC. This study opens an avenue for enhancing the electrocatalytic activity via non-metal doping. Graphical abstract
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2021
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IF 3.196
Xiaolong Shi,Yuanzuo Li,Lihai Wang
Two novel analogues (AF3-1 and AF3-2) of natural pigments that were originally found in wine product, pyranoanthocyanidins, were designed based on pyrano-4′-dimethylamino-10-phenyl-flavylium (AF3) by respectively introducing another electron donor(s), dimethylamino and two methoxyl groups, to the phenyl moiety. They were synthesized and then successfully applied as sensitizers in DSSC to study effect of the additional donor(s) on the DSSC performance for such pyranoanthocyanidin. The introduced second dimethylamino substituent of AF3-1 slightly red shifts the absorption spectrum. Both title dyes show relatively strong ability to shield the photoanode surface from electrolyte and to restrain the electron recapture process. Yet it is difficulty for them to adsorb on the semiconductor surface effectively and to avoid undesirable dye aggregation. DSSCs based on the designed pyranoanthocyanidin turn out to have much higher V oc but decreased J sc compared to AF3. PCE of DSSC assembled with the better of the two pyranoanthocyanidins, AF3-1, is 1.79%, on the same level as that of the reference sensitizer.
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Small
·
2025
·
IF 12.1
Kangning Zhang,Hao Yang,Chuanhao Liu,Xixiu Zhou,Dongyang He,Jiao Qu
Photocatalysis has emerged as a highly promising strategy to address global energy and environmental challenges. Although S-scheme heterojunctions offer a robust strategy for enhancing the migration efficiency of photo-generated charge carriers, their capability to precisely regulate the generation of reactive oxygen species for bacterial inactivation remains unclear. Here, a 2D/2D S-scheme heterojunction is constructed that enables ultrafast interfacial electron transfer and, upon introducing a polar surface, further achieves a marked enhancement in H 2 O 2 production. As a result, the catalyst exhibits markedly enhanced photocatalytic water disinfection performance, achieving a complete 7-log inactivation of E. coli within 40 min under simulated-sunlight irradiation (λ = 200–2500 nm). This work provides new insights into harnessing the potential of S-scheme heterojunctions for the precise control of ROS generation during water disinfection.
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高影响因子
Research
·
2025
·
IF 10.7
Yongzhi Xiong,Mengyuan Qiu,Yihan Wang,Qi Liu,Dong Ouyang,Yajun Liu,Changzhou Chen,Jianchun Jiang,Mengmeng Fan,Kui Wang
Efficient utilization of renewable biomass resources is one of the feasible approaches to address the massive consumption of fossil fuels accompanying severe resource crises and environmental pollution. Currently, 2,5-furandicarboxylic acid derived from the oxidation of biomass-based 5-hydroxymethylfurfural (HMF) is a valuable chemical as the alternative to the fossil resource-derived terephthalic acid. However, the development of high-performance and low-cost Cu-based electrocatalysts for the efficient HMF oxidation reaction (HMFOR) remains an enormous challenge. Guided by our theoretical prediction, we proposed a coordination-pyrolysis strategy to fabricate highly dispersed copper sulfide (CuS) nanosheets supported on N-doped porous carbon precatalyst (CuS@NC). The covalent S species trigger the deep reconstruction of CuS nanosheets, and the in situ generated SO 4 2− not only promotes the formation of Cu 2+δ species but also facilitates the cleavage of α–C–H and –O–H bonds in HMF. The optimized CuS@NC achieved a high current density of 335 mA cm −2 at 1.50 V vs. reversible hydrogen electrode, representing a remarkable 628% enhancement over the control catalyst. This study integrates theoretical predictions with experimental investigations to systematically elucidate how S species promote the deep reconstruction of CuS nanosheets to enhance the HMFOR performance and proposes a scalable strategy for preparing ultra-uniform transition metal sulfide precatalysts.
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高影响因子
HIGH PERFORMANCE POLYMERS
·
2024
·
IF 1.8
Yaqing Wen,Ge Zhu,Jie Li,Xingzhong Fang,Guofei Chen
Two series of novel poly(ester-amide-imide)s (PEsAIs) with pendant phthalimide side group were synthesized by copolymerization of phthalimide-hydroquinone bis(trimellitate anhydride) (PI-TAHQ), p-phthaloyl chloride (TPC) and other fluorinated monomers using the two-step method. These PEsAIs had glass transition temperatures (Tgs) in the range of 228 °C–296°C and coefficients of thermal expansion (CTEs) of 18–55 ppm·K−1. These films had good mechanical properties with tensile modulus of 3.7–5.7 GPa, tensile strengths of 92–153 MPa and elongations at break of 2.2%–8.3%. All films displayed good transparency with transmittances at 400 nm (T400nm) of 43%–79% and transmittances at 850 nm (T850nm) exceeding 89%, and these PEsAIs were amorphous. Especially, PEsAI-d-60 presented the best comprehensive performance with Tg of 296°C, low CTE of 18 ppm·K−1 and high transmittance (T400nm of 79%, T850nm of 91%), which exhibited the potential of this novel poly(ester-amide-imide) containing pendant phthalimide substituent in optical transparent materials.
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CRYSTENGCOMM
·
2020
·Vol. 22
·期 36
·6019-6025
·
IF 3.117
Junli Wang,Fan Guan,Lijun Zhao,Longhua Li,Junhao Zhang,Tingting Wang
Composition engineering is an active topic of research for optical and electronic (nano)crystals and functional materials. We here demonstrate the control over the ratios and distributions of selenium and sulfur in ternary Sb2(Se,S)3 alloy nanorods (NRs), which were synthesized from a molecular chalcogen precursor, selenium disulfide (SeS2). By increasing the anion/cation precursor ratios (SeS2/SbCl3) from 0.5 : 1 to 1 : 1 and 1.5 : 1, an increase in both the Se fractions and the lengths × diameters of NRs is achieved with the Se and S distributions in Sb2(Se,S)3 varying from homogeneity to inhomogeneity. Within the inhomogeneous NRs obtained at high SeS2/SbCl3 ratios containing excessive chalcogen (Se + S), S decreases but Se increases from the center to the periphery as revealed by EDS elemental analyses performed on individual NRs. In particular, the 1D growth anisotropy of NRs allows for a large chalcogen concentration gradient along the axial direction of the resulting NRs from their middle to the two ends. Such non-uniform Se and S distributions can be rationally interpreted by analyzing the growth kinetics and processes of Sb2(Se,S)3 NRs and would give rise to uncommon (opto)electronic properties towards future nanowire-based devices.
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