Journal of Cleaner Production
·
2023
·
IF 11.1
Di Zhang,Hao Tang,Bing Zhao,Lijie Liu,Hongwei Pang,Xiangxue Wang,Shujun Yu
Radioactive uranium removal plays a key role in energy development and environmental security. Sulfide nanoscale zero-valent iron (S-NZVI) has good antioxidant capacity, dispersibility and activity to eliminate U(VI) from wastewater, but the removal efficiency is limited. To improve the reduction and adsorption capacity of S-NZVI, through treating Fe 3+ solution by nitro-functionalized UiO-66 (UiO-66-NO 2 ) with high porosity, UiO-66-NO 2 enhanced S-NZVI adsorbent (S-NZVI/UiO-66) was prepared by liquid phase reduction method. The smaller size and larger specific surface area of S-NZVI/UiO-66 were confirmed by a variety of characterization techniques. Based on the excellent surface structure and reactivity, the U(VI) removal capacity of S-NZVI/UiO-66 (895 mg g −1 ) was much better than S-NZVI (434 mg g −1 ) and UiO-66-NO 2 (267 mg g −1 ). The impacts of pH, background ion strength, coexisting ions and different water environments on adsorption were studied via macroscopic batch experiments. The results showed that S-NZVI/UiO-66 could remove U(VI) adequately in a wide pH range. The removal rate was basically not affected by the concentration of NaNO 3 , demonstrating that the adsorption process of U(VI) on S-NZVI/UiO-66 tended to inner surface complexation. From XPS technique combined with the results of batch adsorption experiments, it was clear that the elimination mechanisms of U(VI) by S-NZVI/UiO-66 were mainly the physical adsorption, electrostatic attraction and complexation of UiO-66-NO 2 , and the reduction and complexation of S-NZVI. Therefore, it is believed that S-NZVI/UiO-66 has a great potential to be an excellent adsorbent in the field of the environment remediation. Moreover, S-NZVI/UiO-66 promises to be a novel nanomaterial for solving the problem of radionuclide contamination in practical environments.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Boyu Jia,Tianbao Liu,Juanjuan Wan,Andrei Ivanets,Yujia Xiang,Lijuan Zhang,Xintai Su
Microbial reduction of hexavalent chromium (Cr (VI)) shows better efficiency and cost-effectiveness. However, immobilization of Cr (III) remains a challenge as there is a limited supply of electron donors. A greener and cleaner option for donating external electrons was using bioelectrochemical systems to perform the microbial reduction of Cr(VI). In this system, we constructed a polydopamine (PDA) decorated Shewanella oneidensis MR-1 ( S. oneidensis MR-1) bioelectrode with bidirectional electron transport, abbreviated as PDA@ S. oneidensis MR-1. The conjugated PDA distributed on the intracellular and extracellular of individual S. oneidensis MR-1 has been shown to accelerate electron transfer by outer membrane C-type cytochromes and flavin-bound MtrC/OmcA pathway by various electrochemical analyses. As expected, the PDA@ S. oneidensis MR-1 biofilm achieved 88.1% Cr (VI) removal efficiency (RE) and 58.1% Cr (III) immobilization efficiency (IE) within 24 h under the autotrophic conditions at the optimal voltage (−150 mV) compared with the control potential (0 mV). The PDA@ S. oneidensis MR-1 biofilm showed increased RE activity was attributed to the shortening of the distance between individual bacteria by PDA. This research provides a viable strategy for in situ bioremediation of Cr(VI) polluted aquatic environment.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Lifang Yang,Aoqi Li,Tan Dang,Yunfei Wang,Liang Liang,Jun Tang,Yanjuan Cui,Zizhong Zhang
S-scheme In 2 S 3 /Zn 3 In 2 S 6 microspheres were successfully prepared through hydrothermal means for enhanced photocatalytic H 2 evolution with simultaneous photodegradation of bisphenol A. The microspheres were assembled by embedding 2D In 2 S 3 nanosheets into 2D-3D Zn 3 In 2 S 6 hierarchical microspheres to enhance visible light absorption and separation/migration of photo-excited charge carriers. In bisphenol A aqueous solution, the photocatalytic H 2 evolution rate on In 2 S 3 /Zn 3 In 2 S 6 shows 15.7 and 7.9-folds improvements against that of the individual In 2 S 3 and Zn 3 In 2 S 6 . Meanwhile, the degradation efficiency of bisphenol A is up to 95.8 %. The S-scheme charge transfer mechanism in In 2 S 3 /Zn 3 In 2 S 6 microspheres maximizes exerting the redox capability of Zn 3 In 2 S 6 for H 2 evolution and In 2 S 3 for bisphenol A degradation.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xinxin Yuan,Zhiling Huang,Jinhua Li,Yue Meng,Zhenhai Gu,Bo Xie,Zheming Ni,Shengjie Xia
The steric effect caused by the lattice mismatch between the two phases hinders the separation and transfer of photogenerated carriers, which is one of the important factors limiting the activity of heterojunction photocatalysts. In this paper, semi - coherent interface Cu2O/Cu7S4 heterojunction was successfully constructed based on the epitaxy growth method of anion exchange. The degradation of tetracycline by semi - coherent interface Cu 2 O/Cu 7 S 4 -30 heterojunction under simulated visible light reached 95.3 % at 60 min, which is a significant improvement compared with single-phase catalysts and ordinary heterojunction catalysts (Cu 2 O/Cu 7 S 4 -mix). The experimental characterization and theoretical calculations confirmed the existence of unique S-Cu-O chemical bonds in the semi - coherent interface Cu 2 O/Cu 7 S 4 heterojunction. On the basis of heterojunction energy band bending and the formation of built-in electric fields, the S-Cu-O bonds can act as a specific bridge to further facilitate the separation, transfer and delivery of photoelectrons and holes, which contributes to the generation of more oxidatively active species (mainly superoxide radicals and holes). In addition, based on experimental characterization and theoretical calculations, the intermediates, degradation pathways and photodegradation mechanisms of the degradation process have also been discussed in detail.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yijie Wang,Hougang Fan,Xiaoyan Liu,Jian Cao,Huilian Liu,Xin Li,Lili Yang,Maobin Wei
Efficient electron transfer process and excellent CO 2 adsorption capacity are of great significance for improving CO 2 photoreduction efficiency. 3 D– 0 D ZnO/CsPbBr 3 S-scheme heterojunction hollow spheres were successfully prepared via a simple self-assembled process for efficient CO 2 photoreduction. Photocatalytic CO 2 reduction experiments showed that the ZnO/CsPbBr 3 had the excellent CO 2 photocatalytic conversion activity to CO, which was about 2.61 times higher than that of ZnO hollow micro-spheres and 1.9 times higher than that of pure CsPbBr 3 quantum dots (QDs). Photoelectrochemical characterization confirmed that the ZnO/CsPbBr 3 composite had good photoelectric conversion ability and carrier transfer ability, which was beneficial to the photocatalytic reaction. The suitable band gap structure and DFT calculation results showed that the formation of built-in electric field at the ZnO/CsPbBr 3 interface can greatly improve the S-scheme electron transfer ability, which can foster the CO 2 photoreduction. Besides, the introduction of 3D structure can improve the dispersion of CsPbBr 3 QDs and effectively enhance the CO 2 capture ability of the catalyst, which greatly promoted the CO 2 photoreduction reaction. The current work can present a novel S-scheme photocatalyst , which is looked forward to providing a certain perception into the advance of novel highly efficient CsPbBr 3 QDs-based photocatalysts for CO 2 resource utilization.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Ningxiang Wu,Xiao Gu,Shuhao Zhou,Xu Han,Huitao Leng,Panpan Zhang,Pan Yang,Ying Qi,Sheng Li,Jingxia Qiu
Membrane capacitive deionization (MCDI) technology is a promising water quality desalination technology. It is reasonably necessary to find suitable electrode materials with unique properties for high desalination performance. Herein, fish scales (FSs) are selected as precursors for obtaining carbon materials with a hierarchical porous structure with the contributions from hydroxyapatites (HAs) templates, which are naturally contained in the FSs. The characterizations of the derived carbon show that it possesses an ultra-high specific surface area of 3,761.71 m 2 g −1 , a lot of micro/mesopores, natural heteroatomic doping sites and excellent wettability. As a result, it shows an excellent desalination capacity of 29.14 mg g −1 and good electrode regeneration performance, proving that the fish scales-derived carbon is promising for MCDI application.
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2022
·Vol. 6
·期 6
·2101032
·
IF 9.173
Junjie Fu,Qingwen Tian,Yachao Du,Qianqian Chang,Yanping Guo,Shengjie Yuan,Zhi Zheng,Sixin Wu,Shengzhong (Frank) Liu
The photovoltaic performance of the kesterite Cu 2 ZnSn(S,Se) 4 solar cells is still far below its predecessor CuInGaSe 2 . One major reason is its severe interface nonradiative recombination at the mismatched Cu 2 ZnSn(S,Se) 4 /CdS heterojunction interface, leading to a large open-circuit voltage loss. Herein, a distinctive indium-incorporation (DI) strategy is developed to deposit an In 1− x Cd x S buffer layer for optimizing the heterojunction interface. The results reveal that adopting this DI method can effectively inhibit the formation of an undesirable secondary phase, and indium can be more easily doped into the bulk lattice of CdS to form additional beneficial shallow donor In Cd defects, which significantly improve the electrical properties of the CdS layer and the quality of the heterojunction interface. Besides, the energy band alignment is adjusted to facilitate the extraction and transfer of interfacial charges, and thus reducing the nonradiative charge recombination at the front Cu 2 ZnSn(S,Se) 4 /CdS heterojunction interface. Consequently, the combination of the above enhances the power conversion efficiency from 10.2% to 12.4%, one of the highest for this type of cells, which corresponds to an open-circuit voltage deficit ( V oc,def ) reduction to as low as 0.54 V. The strategy provides a rational design for optimizing the heterojunction interface of Cu 2 ZnSn(S,Se) 4 solar cells to reduce voltage loss and achieve high efficiency.
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Qian Zhu,Huiqin Gao,Yiwei Sun,Yujia Xiang,Xiangjing Liang,Andrei Ivanets,Xiaoqin Li,Xintai Su,Zhang Lin
The synergistic effect of heteroatoms is a viable method to enhance the adsorption performance of heavy metal onto carbon-based materials. However, the high cost, complex operation and a lot of pollution from the synthesis process have limited its development. Herein, a facile two-step pyrolysis method is used to prepare in situ N and S doped porous biochar from paper mill sludge for the removal of Cr(VI) from aqueous environment. The NSC-450 sample prepared under the optimum conditions has a large specific surface area of 3336.7 m 2 g −1 , an average pore size of 2.56 nm and a total pore volume of 2.10 cm 3 g −1 , manifesting the excellent adsorption capacity of 356.25 mg g −1 for Cr(VI). The adsorption of Cr(VI) by NSC-450 is consistent with the Langmuir isotherm and pseudo-second-order model, suggesting a spontaneous and endothermic chemisorption process. The analysis results show that the NH, graphitic nitrogen and thiophene structures have a positive effect on converting a large amount of Cr(VI) to Cr(III) by synergistic reduction, indicating obviously facilitating Cr(VI) removal compared to other sites. Therefore, in this material, the strong adsorption mechanism is mainly reductive complexation. Moreover, the effects of real water quality, anions, cations and fulvic acid on the adsorption behavior of Cr(VI) onto the NSC-450 were further investigated. The results demonstrate that the chromium removal rate remains above 82% even in actual electroplating wastewater, suggesting NSC-450 has great practical application prospect. This work offered a feasible method for high-value utilization of sludge, but also provided a novel perspective for the future design of heteroatom-doped carbon materials for promoting to eliminate hexavalent chromium from water environment.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yongsong Ma,Xianglin Liu,Mengyi Tang,Kaifa Du,Huayi Yin,Xuhui Mao,Dihua Wang
Heteroatom-doped carbon materials have been proved as potent catalysts for the remediation of organic contaminants. Herein, molten salt electrolysis (MSE) was employed to convert waste eggshell and Co 3 O 4 into N, P, S tri-doped core–shell catalyst (Co@NPSC), achieving the conversion of waste eggshell into value-added materials. Impressively, Co@NPSC/peroxymonosulfate (PMS) system exhibited an exceptional ultra-high turnover frequency (TOF) value of 83.86 min −1 for sulfamethoxazole (SMX) degradation with a low catalyst dosage of 0.001 g L –1 . Subsequently, density functional theory (DFT) simulation clarified the synergistic essences of catalytic oxidation (i.e., the Co@NPSC catalyst reduced the adsorption energy of PMS molecular on its surface, reduced itself work function, enhanced the length of the O-O bond ( I O-O ) of PMS molecule, and facilitated electron transfer for PMS activation). In addition, both theoretical predictions and acute toxicity assay results indicated that the degradation of SMX equals detoxification. This work provides a new insight into the reutilization of waste eggshell and the design of heteroatom-doped core–shell catalysts.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zhijia Zhang,Yuanyuan Yang,Wei Guo,Ganggang Chang,Junsheng Li
Lithium–sulfur (Li–S) batteries are considered promising next-generation energy storage systems due to their high energy density and low cost. However, their practical application still faces challenges such as the “shuttle effect” caused by polysulfides (LiPS). In this work, we use environmentally friendly bacterial cellulose (BC) as the substrate and prepare a flexible Ni-containing coordination polymer-modified carbonized BC interlayer (Ni-CBC). The combined electrochemical theoretical analysis shows that Ni-CBC not only captures LiPS effectively but also facilitates the electrochemical conversion of the adsorbed LiPS. As a result of these favorable features, the battery with the Ni-CBC interlayer delivers a stable discharge performance at 0.2C during long charge–discharge cycles and a high rate capacity of 852 mAh g–1 at 2C. This work suggests that cellulose-based materials with tailored functionality can improve the performance of Li–S batteries.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2022
·
IF 5.895
Hang-Zhi Zhu,Shan Jiang,Jun-Jie Wu,Xue-Rong Zhou,Peng-Yang Liu,Feng-Hong Huang,Xia Wan
Astaxanthin is a highly value-added keto-carotenoid compound. The astaxanthin 3S,3′S-isomer is more desirable for food additives, cosmetics, and pharmaceuticals due to health concerns about chemically synthesized counterparts with a mixture of three isomers. Biosynthesis of 3S,3′S-astaxanthin suffers from limited content and productivity. We engineered Yarrowia lipolytica to produce high levels of 3S,3′S-astaxanthin. We first assessed various β-carotene ketolases (CrtW) and β-carotene hydroxylases (CrtZ) from two algae and a plant. HpCrtW and HpCrtZ from Haematococcus pluvialis exhibited the strongest activity in converting β-carotene into astaxanthin in Y. lipolytica. We then fine-tuned the HpCrtW and HpCrtZ transcriptional expression by increasing the rounds of gene integration into the genome and applied a modular enzyme assembly of HpCrtW and HpCrtZ simultaneously. Next, we rescued leucine biosynthesis in the engineered Y. lipolytica, leading to a five-fold increase in biomass. The astaxanthin production achieved from these strategies was 3.3 g/L or 41.3 mg/g dry cell weight under fed-batch conditions, which is the highest level reported in microbial chassis to date. This study provides the potential for industrial production of 3S,3′S-astaxanthin, and this strategy empowers us to build a sustainable biorefinery platform for generating other value-added carotenoids in the future.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2022
·
IF 4.654
Cheng Lan,Heping Xie,Yifan Wu,Bin Chen,Tao Liu
Electrochemical seawater splitting using efficient HER (hydrogen evolution reaction) and OER (oxygen evolution reaction) electrocatalysts have become an appropriate method for the mass production of green hydrogen. In this study, a noble-metal free OER electrocatalyst consisting of Mo-doped Ni3S2 nanocluster arrays on Nickle foam (Mo–Ni3S2/NF)─fabricated using a modified one-step solvothermal approach─is developed and evaluated. The proposed electrocatalyst demonstrates exceptional OER activity, requiring overpotentials of only 212 and 291 mV to deliver OER current densities of 10 and 100 mA cm–2, respectively, in alkaline seawater. The presence of Mo promotes Ni–S coordination, resulting in strong electronic interactions and substantially enhanced OER kinetics. Meanwhile, surface sulfate ions and (oxy)hydroxide (NiOOH) generated during the OER lead to enhanced activity and corrosion resistance, enabling Mo–Ni3S2/NF to operate continuously at 100 mA cm–2 for 500 h in alkaline natural seawater. This study is expected to inform the progression of sulfur-based transition-metal electrocatalysts for seawater oxidation.
✓ 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）