ACS Applied Energy Materials
·
2022
·
IF 6.959
Jiachen Han,Da Xu,Chun Sun,Hu Zhang,Tong Wei,Jiaqi Tao,Chao Fan,Wengang Bi
Perovskites have gained significant attention due to their excellent optoelectronic properties. However, the poor stability of perovskites hinders their practical applications. To address this issue, we propose a facile approach to synthesize stable CsPbBr3 nanomaterials by embedding them into a SiO2 matrix followed by an in situ PbSO4 shell coating on their surfaces. After the encapsulation, the CsPbBr3@PbSO4/SiO2 powder exhibits high photoluminescence quantum yield (PLQY, ∼85%) due to reduced defects. Most importantly, the CsPbBr3@PbSO4/SiO2 powder shows robust stability under many harsh conditions, such as maintaining its PL in water (for 1 year), concentrated hydrochloric acid (HCl) aqueous solution and hydrobromic acid (HBr) aqueous solution (for 25 days), boiling water (for 24 h), high temperature (500 °C for 24 h), and light irradiation (365 nm for 3 months). This work not only provides a strategy for the facile preparation of ultrastable and efficient perovskites but also shows great potential for practical applications such as solid lighting and backlight displays.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Yun Li,Yu Liu,Liyuan Chai,Xin Wang,Dezhou Zhang,Yongming Chen,Yunyan Wang,Shenghai Yang,Yong Ke,Cong Peng,Pingsheng Zeng,Xingwu Lu,Xiaobo Min
PbSO 4 is the main component of lead paste, lead smoke and other lead-containing solid wastes. It usually matches with the primary lead concentrate to co-smelt for lead extraction, mostly in the oxidation smelting stage. The lead waste quickly experiences different temperature and atmosphere fields from feeding the furnace to the completion of the reactions. This work investigated PbSO 4 decomposition kinetic and phase transformation mechanism during lead waste pyrometallurgical recycling. The results show that the activation energy of the decomposition reaction of PbSO 4 at 800 ℃∼1000 ℃ in Ar atmosphere is 121.35 kJ/mol. The PbSO 4 decomposition reaction in Ar and Air is a multi-step decomposition process, which may undergo PbSO 4 → PbO·PbSO 4 → 2PbO·PbSO 4 → 4PbO·PbSO 4 → PbO. PbO is not generated through direct decomposition of PbSO 4 . The results are expected to provide guidance for the lead wastes co-smelting process to achieve a target PbSO 4 decomposition product.
研究领域:
冶金学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOM
·
2021
·Vol. 73
·期 3
·881-891
·
IF 2.474
Li Yun,Taskinen Pekka,Wang Yuejun,Yang Shenghai,Tang Chaobo,Chen Yongming,Jokilaakso Ari
A promising lead-containing waste recycling method, with sulfur conservation and reductive sulfur-fixing co-smelting process (RSFCS), is proposed. This work investigated the PbSO 4 reduction equilibrium composition, phase conversions, and microscopic transformation mechanisms during the RSFCS process at different temperatures, times, and CO-CO 2 mixtures using thermodynamic modeling, thermogravimetric analysis, x-ray diffraction, and SEM-EDS analysis techniques. At the same time, the gaseous products were collected and analyzed. The results showed that three reduction paths existed: (1) PbSO 4 \( \to ^{{ {\text{CO/CO}}_{{2}} }} \) PbO·PbSO 4 +SO 2 \(\to ^{{ {\text{CO/CO}}_{{2}} }}\) 2PbO·PbSO 4 +SO 2 \(\to ^{{ {\text{CO/CO}}_{{2}} }} \) 4PbO·PbSO 4 +SO 2 \(\to ^{{ {\text{CO/CO}}_{{2}} }} \) PbO+SO 2 \( \to ^{{ {\text{CO/CO}}_{{2}} }}\) Pb; (2) PbSO 4 \( \to ^{{ {\text{CO/CO}}_{{2}} }} \) PbS; (3) PbSO 4 → PbO·PbSO 4 +SO 3 → 2PbO·PbSO 4 +SO 3 → 4PbO·PbSO 4 +SO 3 → PbO+SO 3 . Reduction temperature and CO concentration were determined as major factors in the PbSO 4 reduction. In a relatively weak reductive atmosphere and at low temperature, x PbO·PbSO 4 ( x = 1, 2, 4), PbO, Pb, and SO 2 were the major products. When temperature and the CO concentration increased, PbSO 4 was selectively reduced to PbS, with sulfur in the PbSO 4 fixed in PbS, instead of emitting SO 2 /SO 3 .
研究领域:
冶金学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Pengran Gao,Yi Liu,Weixin Lv,Rui Zhang,Wei Liu,Xianfu Bu,Guanghua Li,Lixu Lei
Three artificial mixtures of PbSO 4 and PbO 2 as well as the active materials obtained directly from the positive plates of spent batteries have been solvothermally treated in methanol at 140 °C for 24 h, which produce mainly PbO·PbSO 4 . The PbO·PbSO 4 can be easily desulphated with ammonium carbonate to produce PbCO 3 , which can be calcined to form α-PbO to be used as positive active material of lead acid batteries . The α-PbO powders are irregular particles and highly electrochemically active, which discharges around 165 mAh g −1 at 5 mA g −1 , 80 mAh g −1 at 200 mA g −1 and 60 mAh g −1 at 400 mA g −1 with excellent cyclic stability in 50 cycles. SEM investigations show that the as-formed PbO·PbSO 4 may inherit and enhance the morphological characteristics of PbSO 4 , and carbonation of PbO·PbSO 4 does not destroy the rod-like characteristics. For the active material from the positive plates of spent lead acid batteries, the discharge capacities are 170 mAh g −1 at the current density of 5 mA g −1 , and 60 mAh g −1 at 400 mA g −1 , which is also similar. In 50 cycles, its capacity loss is only 5%.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2013
·
IF 4.675
Pengran Gao,Weixin Lv,Rui Zhang,Yi Liu,Guanghua Li,Xianfu Bu,Lixu Lei
We have developed a novel route to make new batteries from spent ones, in which we obtain and regenerate the active materials of positive electrode and negative electrode respectively. For the spent lead acid batteries , the positive electrode active materials contain both PbSO 4 and PbO 2 . To make full use of them, we have to investigate the treatment of the mixtures rather than only PbO 2 , which we have reported previously. Here we report our investigation on three mixtures of PbSO 4 and PbO 2 in different mole ratios, as well as the electrode materials directly from the spent batteries. The mixtures are firstly desulphated, and then solvothermally processed in methanol at 140 °C for 24 h. The as-obtained solids contain both PbO·PbCO 3 and PbCO 3 , which have been calcined to form α-PbO. The α-PbO powders are similar irregular particles and highly electrochemically active, which discharge around 170 mAh g −1 at 5 mA g −1 , 80 mAh g −1 at 200 mA g −1 and 60 mAh g −1 at 400 mA g −1 with excellent cyclic stability in 50 cycles.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
WASTE MANAGEMENT
·
2025
·
IF 7.1
Yunyan Wang,Maixin Yu,Yu Liu,Xiaobo Min,Zelong Huang,Cong Peng,Yong Ke,Pingsheng Zeng,Xingwu Lu,Yun Li
At present, lead-containing wastes have increasingly become the raw materials together with primary lead concentrate for lead production to meet the ever-increasing lead demand market. PbSO 4 is the dominant component in the lead-containing wastes, nevertheless, its reaction behavior during lead smelting is not sufficiently investigated. This study investigated PbSO 4 decomposition behaviors and phase transformation mechanisms at oxidizing and reductive atmospheres and various gas flow rates. The investigations reveal that increasing the temperature and decreasing the oxygen partial pressure of the decomposition atmosphere can accelerate PbSO 4 decomposition degree. PbSO 4 decomposition intensity under different atmospheres follows the order of reducing atmosphere > inert atmosphere > oxidizing atmosphere. PbSO 4 decomposition path was identified: at a non-reductive atmosphere, the decomposition of PbSO 4 belongs to a multi-step decomposition process, PbSO 4 gradually decompose into xPbO·PbSO 4 (x = 1, 2, 4 in turn) and finally PbO. At a reductive atmosphere, the multi-step decomposition process was accelerated significantly, at the same time, the reduction decomposition path PbSO 4 → PbS was increasingly dominant with the extension of decomposition time. PbS and Pb were generated successively. Therefore, a suitable reducing atmosphere is suggested to co-smelt PbSO 4 -bearing wastes in primary lead smelting furnace.
研究领域:
冶金学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Junyang Yin,Feng Wu,Jiangnan Dai,Changqing Chen
Perovskite quantum dots (PQDs) are emerging as promising nanomaterials for optoelectronic applications. However, developing a cost-effective green synthesis process that simultaneously possesses satisfactory photoluminescence quantum yield (PLQY) and stability remains a severe challenge. Here, CsPbBr 3 @PbSO 4 nanocomposites with a near-unity PLQY of 99.8 % and robust ambient stability are synthesized in situ in water via 4-Bromobenzenesulfonic acid and ditetradecylamine ligands. Notably, these nanocomposites show no decline in PLQY even after being immersed in water for over 250 days, and also exhibit superior stability against heating, ultrasonication, UV irradiation, anion exchange, and erosion by polar solvents. First-principles calculations reveal that CsPbBr 3 @PbSO 4 nanocomposites can form a natural quantum well structure, which effectively promotes the radiative recombination of carriers in CsPbBr 3 QDs. Meanwhile, the remarkable stability is attributed to the ultrahigh decomposition enthalpy of PbSO 4 that serves as a strong barrier preventing the invasion of anions and polar media into the embedded CsPbBr 3 QDs. Finally, besides the convenient application of green fluorescent paper, a fingerprint recognition is demonstrated by fabricating a bright-green LED integrated with the CsPbBr 3 @PbSO 4 nanocomposites powder and a commercial UV chip. This work provides a new strategy for green synthesis and practical application of high-efficient and ultrastable PQDs.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Jihong Zheng,Fumin Li,Chong Chen,Qing Du,Mengqi Jin,Huilin Li,Mingxing Ji,Zhitao Shen
2,2′,7,7′-Tetrakis(N,N-di-p-methoxyphenyl-amine)-9,9′-spirobifluorene (spiro-OMeTAD), the most widely used hole transport material in high-efficiency perovskite solar cells (PSCs), still has serious defects, such as moisture absorption and poor long-term conductivity, which seriously restrict further improvement of the power conversion efficiency (PCE) and stability of the cell. Herein, to overcome these problems, inorganic salt PbSO4(PbO)4 quantum dots (QDs) are incorporated into spiro-OMeTAD as the hole transport layer (HTL) for the first time. The incorporated PbSO4(PbO)4 QDs significantly hinder the agglomeration of lithium bis(trifluoromethanesulfonyl)-imide and improve the long-term conductivity through the oxidative interaction between PbSO4(PbO)4 QDs and spiro-OMeTAD and hydrophobicity of the HTL. Furthermore, the spiro-OMeTAD:PbSO4(PbO)4 composite film can effectively passivate perovskite defects at the perovskite/HTL interface, resulting in suppressed interfacial recombination. As a result, the PSC based on the spiro-OMeTAD:PbSO4(PbO)4 HTL shows an improved PCE of 22.66%, which is much higher than that (18.89%) of the control device. PbSO4(PbO)4 also significantly improves the moisture stability for 50 days at room temperature (at RH ∼ 40–50%) without encapsulation. This work indicates that inorganic PbSO4(PbO)4 QDs are crucial materials that can be employed as an additive in spiro-OMeTAD to enhance the efficiency and stability of PSCs.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xiaohui Ma,Liqun Yang,Xueni Shang,Mengjia Li,Deyu Gao,Cuncun Wu,Shijian Zheng,Boxue Zhang,Jiangzhao Chen,Cong Chen,Hongwei Song
The trap-assisted nonradiative recombination at grain surface and grain boundary (GB) of perovskite films impede the further improvement of power conversion efficiency (PCE) and stability of perovskite solar cells (PSCs). In addition, the poor moisture stability of perovskite films hinders the commercial application of PSCs. Herein, we report a multifunctional GB modification strategy where the wide-bandgap hydrophobic PbSO 4 modification layer is in situ formed at the GBs of perovskite films through the reaction between methylamine sulfate and PbI 2 . It is revealed that multiple functions are achieved after the formation of PbSO 4 modification layer, including crystallization improvement, defect passivation, and hydrophobicity improvement. As a result, the PbSO 4 modified device exhibits a PCE enhancement from 19.53% to 21.90% as compared to the control device. Moreover, up to 71% of its initial PCE is maintained for the unencapsulated PbSO 4 modified device after aging under a relative humidity of 80 ± 5% for 250 h. This work proposes an effective multifunctional approach to modify the GBs of perovskite films for the purpose of simultaneous increasement of PCE and stability.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 10
·2593-2606
·
IF 2.5
Li Er-Mei,Zhu Li,Li Chao-Xiong,Shi Ling-Jun,Li Bing,Li Fang,Deng Ning,He Jian-Bo
Stannous sulfate is commonly used as an additive in the positive lead pastes of lead-acid batteries, but its real function and mechanism are still vague and need further study. The present work investigates the intrinsic effects of tin additives on the positive electrode performance under well-controlled experimental conditions. The tin additives are added in three ways: the SnSO 4 dissolved in 4.5 M H 2 SO 4 electrolyte, the metal Sn melted in metal Pb substrate, and the SnSO 4 mixed in homemade industrial lead pastes. A series of evolutions are clearly revealed in structure, composition, and redox activity of the positive active materials with the content of Sn. Both the SnSO 4 in the electrolyte and in the positive lead pastes have a significant inhibiting effect on the transformation between PbSO 4 and PbO 2 , leading to a decrease in the charge/discharge capacities with increasing content of SnSO 4 . A similar but weaker inhibiting effect was also found for the Sn melted in the Pb-Sn alloys. The SnSO 4 has a significant enhancement effect on the grain size of PbSO 4 /PbO 2 , which increases the resistance of the solid-phase transformation deep inside the grains during the charge/discharge. All these results do not support the use of SnSO 4 in the positive pastes of lead-acid batteries. Graphical abstract
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Chong Chen,Fumin Li,Liangxin Zhu,Zhitao Shen,Yujuan Weng,Qiang Lou,Furui Tan,Gentian Yue,Qingsong Huang,Mingtai Wang
The defects in perovskite crystals and the penetration of moisture/oxygen into the perovskite layer are major problems for perovskite solar cells (PSCs) to achieve long-term stability and high power conversion efficiency (PCE). However, there is still a lack of multifunctional passivation materials to solve these problems. Herein, for the first time, we report oleyl amine-coated PbSO 4 (PbO) 4 quantum-dots (QDs), as a passivation material with dual functions to simultaneously passivate the surface defects and block the penetration of moisture/oxygen into the perovskite layer for stable and efficient PSCs. The PbSO 4 (PbO) 4 QDs significantly reduce the defect density of the as-prepared CH 3 NH 3 PbI 3 films by passivating under-coordinated Pb ions and I anions and effectively enhance charge extraction efficiency at the TiO 2 /CH 3 NH 3 PbI 3 and CH 3 NH 3 PbI 3 /spiro-OMeTAD interfaces. Moreover, the hydrogen bond between H atoms of the OA and I atoms of the perovskite and the interface electric field at CH 3 NH 3 PbI 3 /OA interface also contribute to the improvement of efficiency and stability of PSCs. Finally, higher PCE (20.02%) is achieved by the PSCs with OA-coated PbSO 4 (PbO) 4 QDs compared to that (16.86%) of the PSCs without OA-coated PbSO 4 (PbO) 4 , corresponding to a 18.7% enhancement. Moreover, the PSCs with OA-coated PbSO 4 (PbO) 4 QDs maintain 90% of initial efficiency after operation for 280 h, indicating better stability than the PSCs without PbSO 4 (PbO) 4 QDs.
研究领域:
材料科学
·
能源技术
✓ 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）